Academic literature on the topic 'Steel tube AISI 4130'
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Journal articles on the topic "Steel tube AISI 4130"
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Rajan, K. M., and K. Narasimhan. "Failure Studies on Flow Formed High Strength Pressure Vessel: A Case Study." Journal of Pressure Vessel Technology 125, no. 3 (August 1, 2003): 253–59. http://dx.doi.org/10.1115/1.1593702.
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High strength thin walled flow formed tubes are manufactured from AISI 4130 medium carbon low alloy steel. Starting with an ultimate tensile strength of 650 MPa, the material has recorded a tensile strength of 1250–1300 MPa corresponding to a percentage thickness reduction of 88. It has been observed that material with higher impurity levels and inclusion ratings are more vulnerable to development of micro cracks at higher percentage thickness reduction. Deformed inclusions like MnS act as stress raisers leading to initiation of micro cracks. Hard to deform inclusions like silicates create high stress concentration at inclusion-matrix interface, leading to de-cohesion and finally cracking. The presence of dissolved gas contents, particularly hydrogen, are harmful in flow forming. Hydrogen embrittlement is a serious problem which is likely to lead to cracking of the flow formed tube. It could be concluded from this study that clean steel (electro slag refined) processed through hardening and tempering route with a maximum percentage reduction in thickness of 88 or less can give consistently very high strength of the order of 1250–1300 MPa for AISI 4130 steel.
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Purnama, Nurul Chandra. "ANALISIS KEGAGALAN SOOTBLOWER TERHADAP PERPINDAHAN PANAS DI PIPA BOILER." Jurnal Teknik Mesin 6, no. 3 (November 12, 2017): 187. http://dx.doi.org/10.22441/jtm.v6i3.1968.
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Kementerian Energi dan Sumber Daya Mineral (ESDM) menyebut konsumsi listrik nasional saat ini masih terbilang mini, yaitu seperempat dari indikator negara maju di dunia. Dengan angka 956 per Kilowatt-hour (kWh) per kapita, konsumsi listrik Indonesia baru mencapai 23,9 persen dari konsumsi listrik negara maju sebanyak 4 ribu kWh per kapita. Salah satu komponen utama pada sistem pembangkit adalah boiler. Uap hasil produksi Boiler ini digunakan untuk memutar turbine yang akan menggerakkan generator guna menghasilkan listrik. Sootblower merupakan peralatan penunjang pada boiler yang berfungsi untuk membersihkan jelaga. Oleh karena itu peranan sootblower sangat penting dalam menjaga effisiensi boiler. Tujuan dari dilakukan analisis ini adalah mampu mengidentifikasi penurunan perpindahan panas yang terjadi pada pipa boiler, mengidentifikasi faktor penyebab kegagalan pada Sootblower, mengurangi energi yang terbuang akibat pengoperasian Sootblower. Metode penelitian untuk melakukan pelaksanaan analisis sootblower ini terdiri atas berbagai bagian, antara lain: studi literatur, proses pengumpulan data, kemudian data diolah dan dilakukan analisis guna mengetahui penyebab kegagalan pada sootblower. Hasil dari analisis kegagalan pada sootblower ini didapatkan bahwa sootblower gagal beroperasi karena ada masalah pada lance tube yang sering bengkok sehingga mempengaruhi proses perpindahan panas di pipa boiler, oleh sebab itu di rekomendasikan untuk penggantian material lance tube dari carbon steel A105 dengan defleksi 1,1 m menjadi chrome moly (AISI 4130) dengan defleksi 1,05 cm dan dilakukan perawatan sootblower lebih baik dan rutin lagi.
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Rajan, K. M., P. U. Deshpande, and K. Narasimhan. "Effect of heat treatment of preform on the mechanical properties of flow formed AISI 4130 Steel Tubes—a theoretical and experimental assessment." Journal of Materials Processing Technology 125-126 (September 2002): 503–11. http://dx.doi.org/10.1016/s0924-0136(02)00305-9.
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Gür, C. H., and E. B. Arda. "Effect of tube spinning and subsequent heat treatments on strength, microstructure and residual stress state of AISI/SAE type 4140 steel." Materials Science and Technology 19, no. 11 (November 2003): 1590–94. http://dx.doi.org/10.1179/026708303225008022.
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Heidary, O., O. Mirzaee, A. Honarbakhsh Raouf, and E. Borhani. "Texture development during austempering process of an AISI 4130 steel." Materials Science and Engineering: A 793 (August 2020): 139751. http://dx.doi.org/10.1016/j.msea.2020.139751.
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Jeelani, S., and M. Musial. "A study of cumulative fatigue damage in AISI 4130 steel." Journal of Materials Science 21, no. 6 (June 1986): 2109–13. http://dx.doi.org/10.1007/bf00547954.
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Allou, Djilali, Djamel Miroud, Billel Cheniti, Brahim Belkessa, and Mhamed Ouadah. "Mechanical and Electrochemical Properties of AISI4130/Austenitic Steels Dissimilar Welded Joints." Diffusion Foundations 18 (September 2018): 65–72. http://dx.doi.org/10.4028/www.scientific.net/df.18.65.
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The microstructure and mechanical properties of AISI 4130 and austenitic stainless-steel overlay dissimilar weld joint using Shield Metal Arc Welding (SMAW) process were investigated. Two different filler alloys have been employed (ENiCrFe-3 and E309 MoL-17). A type II boundary was formed close to the fusion boundary at the AISI 4130 side, due to the diffusion of carbon from the carbon steel (CS) base metal towards the weld metal. On the other side, the joints strength and hardness profiles were almost independent of filler alloy, where the highest hardness value was recorded in the area between the line fusion and the type II boundary. The polarization tests performed in different regions of the welded joints in H2SO4solution (PH 4.7) revealed a high corrosion resistance of both filler alloys.
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Casalino, Giuseppe, Mahmoud Moradi, Mojtaba Karami Moghadam, Ali Khorram, and Patrizia Perulli. "Experimental and Numerical Study of AISI 4130 Steel Surface Hardening by Pulsed Nd:YAG Laser." Materials 12, no. 19 (September 26, 2019): 3136. http://dx.doi.org/10.3390/ma12193136.
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Laser surface transformation hardening (LSTH) of AISI 4130 was investigated by a Nd:YAG pulsed laser. Laser focal height (LFH), pulse width (LPW), scanning speed (LSS), and power (LP) varied during the experiments. The microstructure of the treated zone was characterized by optical (OM) and field emission scanning electron microscopy (FESEM). Micro-hardness was measured in the width and depth directions. Results showed that the hardness and depth of hardened layer increased by decreasing the LSS and the laser focal position (LFP), and by increasing the LPW. The results were compared with those obtained by furnace heat treatment of the same steel. Eventually, a finite element model was employed for the simulation of the LSTH of AISI 4130 steel and calculation of the heat-treated zone. The results showed that the model can predict with accuracy the temperature profile and the size and the shape of the laser hardened region.
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Bultel, Hélène, and Jean-Bernard Vogt. "Influence of heat treatment on fatigue behaviour of 4130 AISI steel." Procedia Engineering 2, no. 1 (April 2010): 917–24. http://dx.doi.org/10.1016/j.proeng.2010.03.099.
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Gukendran, R., R. Parameshwaran, and K. Ponappa. "Characterization of Case Hardened AISI 4130 Steel Using Eddy Current Testing." Archives of Metallurgy and Materials 62, no. 3 (September 26, 2017): 1833–37. http://dx.doi.org/10.1515/amm-2017-0277.
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Abstract Casting is the manufacturing process of pouring the hot liquiduos state metal in to the mold cavity and then allowed it to solidify to obtain the final casting. There are many defects are found in the casting components during the inspection. Some defects are tolerated while others are required to repair. Otherwise the casting component is to be eliminated due to the poor quality level. The aim of the non-destructive inspection is to determine, the flaws, discontinuities on the material, and characteristics of the material. Based on the results by non-destructive evaluation the personnel take the decision on the material object is to be accepted or not as per the criteria. In this paper the hardness attribute of the case hardened AISI 4130 steel samples are studied using Vickers Hardness test. Then the hardness property is correlated with the Eddy Current Testing method. According to the acceptance criterion the suitability of the material is analyzed for the corresponding application or not. In this paper Eddy Current Testing response is analyzed for the AISI 4130 samples to determine the mechanical properties of the material. The main objective of the paper is to investigate the effect of the hardness property of the casting material during various case depth obtained via case hardening process. This technique is effective and best practice for the heat treatment shop floors. By this technique the results are investigated based on the cracks and microstructure of the casting material.
Dissertations / Theses on the topic "Steel tube AISI 4130"
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Coelho, Fernando. "Influência do ângulo de preparação da junta no aço tubular AISI 4130 soldado pelo processo TIG." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153585.
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Submitted by Fernando Coelho (coelho-fernet@ig.com.br) on 2018-04-17T15:09:25Z
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As indústrias metalúrgicas de diversos segmentos buscam continuamente aperfeiçoar seus processos e reduzir custos de produção de estruturas metálicas. Variações em um processo térmico padronizado ou na configuração do produto podem causar alterações na microestrutura e nas propriedades mecânicas do, bem como, no comportamento mecânico do material. Assim, o presente estudo avaliou os efeitos das variações do ângulo de chanfro da junta em tubos de aço redondos AISI 4130 sem costura, quando soldados no processo TIG (Tungsten Inert Gas). Os tubos foram cortados com arco de plasma e preparados com ângulos, 30°, 45° e 60°, e 1 milímetro de altura da raiz. A soldagem foi realizada em dois passes, sendo o primeiro passe na raiz pelo método autógeno e o segundo de preenchimento com metal de adição arame-eletrodo AWSER80S-B2. As juntas soldadas foram submetidas a análises metalográficas de macrografia e microscopia óptica, para avaliação metalúrgica das zonas fundida e afetada pelo calor. Também foi realizado ensaio mecânico de tração e microdureza Vickers para verificar o desempenho mecânico e a dureza do material. A variável de interesse do estudo foi evidenciada por meio da estabilização do processo de corte e soldagem com uso de uma máquina rotativa digital desenvolvida no presente estudo. Os resultados obtidos evidenciaram uniformidade entre os cordões produzidos, variações nas geometrias dos cordões, no tamanho de grão e nas fases de transformação da microestrutura, com impacto na dureza da ZF (Zona Fundida), assim como no desempenho mecânico verificado com ensaios de tração. Conclui-se que, variações no ângulo da junta alteram a área de contato do arco com a poça de fusão, assim como, da poça de fusão com a ZAC. Com isso têm-se diferentes eficiências de transferência de energia térmica por condução, com diferentes ciclos térmicos que resultam em fases e transformações metalúrgicas distintas.
The metallurgical industries at several segments are continuously looking for improving their process and decrease metallic structures production costs. Modifications in a standardized thermal process or in the product configuration can leads to microstructure changes and in the mechanical properties,as well, in the mechanical behavior from the material. Thus, the current study made an assessment of the angle variation effect in steel round tubes joint AISI 4130 without seam, when welded by mechanized TIG process (Tungsten Inert Gas). The steel tubes were cross cut with plasma and prepared in three different angles 30°, 45° and 60°, with 1 millimeter height of root. The welding was made in two passes, the first one in the root by autogenous methode and the second one for filling using eletrode wire AWS ER80S-B2. The welded joints were submitted to metallographic test of macrograph and optical micrographics for metalurgical assessment in the melted zone and the heat affected zone. In addiction was made traction tests and micro hardness Vickers for verify the mechanical behavior and hardness from the material. The interest variable in this study, was evidenced by cut and welding process stabilization using a digital rotative machine developed in this study. The obtained results showed uniformity between weld beads produced with variation in the geometry, as well, in the grain size and in the fases transformations from the microstructure, with impact in the melted zone hardness profile, and in the mechanical properties verified by traction test. It´s pissible conclude that joint chanfer angle variations cause changes in the contact area size between the arc and the molten puddle, and between the molten puddle with the base metal. With this, diferent energy transfer efficency by conduction are obtained producing diferent thermal cicle, that can result in diferent metallurgical fases and microstructure transformations.
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Evins, Joseph Lee. "Dependence of Strength on Corrosion-Fatigue Resistance of AISI 4130 Steel." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5265.
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Automobile components are often exposed to aggressive environments as a result of aqueous salts from the road coming into contact with unprotected steel. This situation greatly reduces both the life and the appearance of the affected parts. Ultra-high strength steel parts are suspected to exhibit poor corrosion-fatigue properties and be more susceptible to corrosion in general.
In this study, the effect of strength level on the decrease in fatigue life of AISI 4130 steel when exposed to an aqueous salt solution is quantified. The observed mechanical properties including corrosion-fatigue behavior are examined with consideration to different microstructural characteristics resulting from heat treatments to the steel. The hardness and tensile properties of the test material were characterized before fatigue testing. Fatigue tests were completed in both air and salt solution to determine the effect on fatigue life of the latter environment. Following fatigue testing, the fracture surface was examined using a scanning electron microscope (SEM) to determine the failure mode.
Six strength levels of AISI 4130 steel were investigated ranging from 837 to 1846 MPa (121 268 ksi). The frequency of loading used for corrosion-fatigue tests was 1 Hz and the stress ratio for each test was constant at R = 0.1. The corrosion-fatigue tests consisted of the specimen being submerged in an aqueous solution of sodium chloride, calcium chloride, and sodium bicarbonate and fatigued until failure. The solution was maintained at room temperature with constant aeration to ensure constant oxygen levels. The parameters of interest were the applied loads and the cycles to failure.
There were four primary findings of the study. First, decreases in fatigue life of the material caused by the corrosive environment ranged from 100% in the lowest strength level to 190% in the higher strength levels. This result showed that higher strength in this steel corresponds to increasing detriment to fatigue life when the material is exposed to an aqueous salt environment. Second, evidence was found that the salt solution lowered the fatigue limit for each strength level studied in this material. All specimens that were tested in the corrosive environment failed in less than 150,000 cycles, while some specimens fatigued in the air environment experienced run-outs at over 106 cycles. Third, the decrease in fatigue life was attributed to the presence of martensite in the structure of the steel. It was noted that the higher the martensite content, the larger the decrease in fatigue life when exposed to the corrosive environment. Finally, the fracture surfaces of fatigued specimens revealed that a similar cracking mode was present for each strength level in both environments. Enhanced crack initiation was, therefore, assumed to be the cause of the decrease in fatigue life between the air and aqueous salt environments.
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BATISTA, Valmir Rodrigues. "Efeito do processo de soldagem e da temperatura de preaquecimento sobre a susceptibilidade à fragilização por hidrogênio de juntas soldadas dissimilares utilizadas no setor offshore da indústria do petróleo." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1043.
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CNPq
Neste trabalho é apresentado um estudo sobre a susceptibilidade à fragilização por hidrogênio de juntas soldadas de metais dissimilares presentes em equipamentos submarinos da indústria do petróleo, as quais ficam submetidas a condições de uso que envolvem esforços mecânicos severos, em ambientes corrosivos, proveniente da água do mar e do fluido petrolífero. O objetivo dessa pesquisa foi avaliar o efeito da utilização dos processos Plasma Pó (PTA-P) e MIG para a aplicação de "amanteigamentos" com Liga de Ni sobre a susceptibilidade à fragilização por hidrogênio de juntas soldadas de aços dissimilares utilizadas em aplicação offshore utilizando diferentes temperaturas de preaquecimento e interpasse e também comparar os resultados para dois aços para válvula, o AISI 8630M e AISI 4130. O processo de soldagem utilizado para a união das juntas foi o processo MIG utilizando-se como metal de adição o arame eletrodo, Inconel-625 (ER NiCrMo-3) de 1,2 mm de diâmetro. Os dois aços foram submetidos a três diferentes combinações de temperaturas de preaquecimento e interpasse antes dos amanteigados pelos processos PTA-P e MIG. Após a etapa de amanteigamento foram realizadas análises de composição química por EDS, microestruturais por MO e MEV, e de microdureza antes e depois do TTAT. Em seguida foram executadas as soldagens de união pelo processo MIG. As amostras de tração foram previamente hidrogenadas simulando as condições existentes de proteção catódica em ambiente submarino. O aumento das temperaturas de preaquecimento e interpasse resultou em maior refino dos grãos da ZTA, entretanto proporcionou aumento da média de sua microdureza e de sua extensão, e em maior migração de Fe do MB para o MS, resultando em maior fragilização por hidrogênio. Pelo processo PTA-P houve uma menor diversidade e frequência de incidência de zonas parcialmente diluídas (ZPD), sendo encontradas apenas ZPD do tipo contínua, enquanto que pelo processo MIG foram encontradas ZPD do tipo descontínua, com diferentes morfologias. O TTAT proporcionou uma significativa redução de 20% a 44% nos valores da microdureza da ZTA. Com base nos níveis de deformação e Índice de Fragilização (IF), o aço AISI 4130 apresentou os melhores resultados com relação à fragilização por hidrogênio.
This Thesis presents a study about hydrogen embrittlement susceptibility of dissimilar metals welded joints present in oil industry equipment, specifically in valves connections with pipes for the oil transport, which are subject to use conditions involving severe mechanical stresses in corrosive environments, from the seawater and the oil fluid. As the valves steel are martensitic its heat affected zone (HAZ) may be susceptible to hydrogen embrittlement not only from cathodic protection but also from the seawater and H2S. Therefore, to prevent this potential embrittlement and consequently crack formation in these regions of the welded joint, is used as nickel alloy filler metal. Therefore, the part of martensitic steel previously undergoes a "buttering" process which consists of applying layers of Ni deposited by welding. The welding process used for the union of the joints was the MIG process using as filler metal the Inconel-625 (ER NiCrMo-3) wire electrode 1.2 mm in diameter. Two steels were buttering, AISI 8630M and AISI 4130. Both were subjected at the three different combinations of preheat and interpass temperatures. For the buttering realization, the same alloy, in powder form, was used by Plasma powder process (PTA-P). To evaluate the efficiency of the PTA-P process in buttering operation it was compared with other buttering performed by MIG process with the same filler metal of the weld joint. After buttering the samples were subjected to post welding heat treatment (PWHT). Chemical composition analyses were performed by Energy Dispersive Spectroscopy (EDS), microstructure by Optical Microscopy (OM) and Scanning Electron Microscopy (SEM), and microhardness. After the welding the samples were machined and hydrogened using a process similar to those used for cathodic protection and submitted to tension tests. The Increase in the preheat and interpass temperature resulted in higher refining the grains of the HAZ however it, increased its average microhardness and extension, promoted greater Fe migration from MB to the buttering, increasing the hydrogen embrittlement. The use of PTA-P process promoted a very lower incidence and diversity of partially diluted zone (PDZ), being found only continuous PDZ. The PWHT promoted a reduction from 20% to 44% of hardness values. Based on the deformation levels and Embrittlement Index (EI), the AISI 4130 steel showed the best results with respect to hydrogen embrittlement.
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Abrantes, Jorge Paiva. "Uma contribuição à modelagem experimental e teórica do processo de conformação hidrostática de tubos de aço inoxidável AISI 316 L." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-03092009-154313/.
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O uso da simulação via método de elementos finitos (MEF) tem sido de suma importância para o desenvolvimento de processos de conformação hidrostática de tubos (CHT). Sua utilização reduz o método de tentativa e erro na definição do processo e grandes ganhos de produtividade são auferidos. Neste trabalho, a simulação via MEF em conjunto com o desenvolvimento analítico existente na literatura foi utilizada para o desenvolvimento de um método projeto de uma ferramenta simples para a CHT em matriz aberta e para uso em prensa comum. Obtida a ferramenta, foi possível a um baixo custo ser determinado experimentalmente os limites de conformação, o caminho de deformação e as dimensões do tubo expandido sendo possível compara-los com os resultados simulados via MEF. Esta comparação de resultados experimentais e simulados validou o procedimento de simulação e o método de projeto da ferramenta. Quanto ao carregamento, com a ferramenta obtida foram expandidos tubos por dois carregamentos distintos: só pressão e pressão e carga axial simultâneos permitindo assim comprovar a eficácia do segundo carregamento para a obtenção de razões de expansão maiores. Quanto às simulações, executadas em um programa comercial, elas foram desenvolvidas também para ambos os carregamentos. Ainda nestas simulações duas maneiras de aplicar-se a pressão foram avaliadas. Para a determinação dos limites de conformação do tubo fez-se uso da técnica denominada Circle Grid Analisys. Foi escolhido para estudo um tubo extrudado de aço inoxidável AISI 316 L submetido a tempera de solubilização. O método de projeto desenvolvido, numa primeira tentativa, utilizou como dado de entrada as propriedades do Aço AISI 316 L obtidos para chapas o que levou a diferenças entre os resultados simulados e experimentais. Assim foi necessário determinar-se as propriedades do aço AISI 316 L para a condição de tubo extrudado. Para a direção circunferencial utilizou-se o método de ensaios denominado Ring Hoop Tension Test, e para o sentido longitudinal o foi utilizado um ensaio de tração usual. Foram determinados inclusive os coeficientes de anisotropia. Com estes dados novas simulações, considerando a anisotropia do material, foram realizadas. Um aprimoramento do método de projeto foi realizado, sendo construída uma segunda versão da ferramenta para a CHT. Assim os novos resultados simulados foram obtidos e foram comparados com os resultados experimentais e os erros diminuíram significativamente. Como resultado final, para esta segunda versão de simulações, de projeto e ferramenta, os erros dos valores obtidos via simulação via MEF, no diâmetro e na espessura ficaram ao redor de 10%, assumindo o resultado experimental como padrão. Quanto ao limite de conformação os resultados simulados diferiram dos experimentais, porém o estado de deformação e os caminhos de deformação situaram-se no mesmo quadrante no plano das deformações (Curva CLC) para os dois carregamentos. Finalmente, quanto ao diâmetro externo do tubo para os dois carregamentos, o tubo em aço Inoxidável AISI 316 L atingiu diâmetros até 12,9% maiores para expansão por pressão e carga axial em relação àqueles expandidos somente por pressão, os quais foram assumidos como padrão.The simulation using the finite elements method (FEM) has been of utmost importance for the tube hydroforming (THF) processes development. It reduces the try and error method in the process definition and great profits are gained. In this work, the FEM simulation together with the existing analytical THF theory in the literature was used to develop a process and a simple tool design for the THF, in open die arrangement and to be used in a common press. Gotten this tool, it was possible in a low cost, determine experimentally the forming limits, the strain paths and the evolution of geometry for a tube and then make it possible compares these experimental results with the simulated results obtained by FEM. This comparison of experimental and simulated results validated the simulation procedure and the tool design method. Relate the loads applied during the THF, two distinct load cases were possible: only pressure and simultaneous pressure and axial load, thus allowing proving the effectiveness of the second load case in obtain bigger expansion ratios. Relate to the simulations, they were run in commercial software and also the two load cases were simulated. Additionally in these simulations, two ways to apply the pressure had been evaluated. In the experiments, in the forming limits determination, the Circle Grid Analysis technique was used. A seamless stainless cold finished AISI 316 L solution annealed and quenched tube was chosen for evaluation. The tool design method, in a first attempt, uses the AISI 316 L steel properties obtained from sheets. Big differences between the FEM simulated and experimental results was gotten. Thus, it was necessary execute tensile tests in order to obtain the AISI 316 L steel properties for the seamless stainless cold finished, solution annealed condition. In such a way, a tensile tube test method called Ring Hoop Tension Test was used, to determined AISI 316 L steel properties in the transversal direction and a common tensile test was used for the longitudinal direction. Also, for both directions, anisotropy coefficients were also determined. With these new material properties set, new simulations including the anisotropy and a new improved tool design method were carried through, resulting in a new and improved tool version. Thus, new experiments were performed and compared with the new simulated results and the errors had diminished significantly. As final result, the errors in the diameter and in the thickness had been around of 10%, assuming the experimental result as standard. Relate the forming limits the results had differed, however the strain state and the strain path had been placed the same quadrant in a strain plane graphic (FLD diagram) for both load cases. Finally, relate to the tube expansion ratio, the tube external diameter increase 12,9% greater for tube expansion under pressure and axial load assuming the tube expansion under only pressure as standard.
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Deitos, Filho Marco Antônio. "Influência das variáveis do processo de soldagem TIG alimentado duplo arame quente na diluição e morfologia de cordões de solda de inconel 625 depositados em um aço AISI/SAE 4130." Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/1990.
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Equipamentos utilizados na produção offshore de petróleo estão sujeitos a danos severos devido à exposição a compostos corrosivos presentes no fluido produzido. Por isso, materiais resistentes à corrosão, como a superliga à base de níquel UNS N06625 (Inconel® 625), são usados em áreas de passagem de fluido de produção. Entretanto, o elevado custo desta liga restringe sua utilização em todo o equipamento. Como solução para este problema são produzidos equipamentos com materiais de menor custo e revestidos com a liga mais nobre. Para esses revestimentos o processo de soldagem TIG alimentado duplo arame quente é tido opção por produzir soldas com qualidade e produtividade. O objetivo desse trabalho foi determinar a influência da corrente média (Im), velocidade de soldagem (Vs), velocidade de alimentação (Va), corrente do material de adição (Ia) e composição do gás de proteção (Gs) sobre a diluição (D), penetração (P), largura (L) e reforço (R) dos cordões de solda depositados pelo processo de soldagem TIG alimentado duplo arame quente sobre um aço AISI/SAE 4130. Para essa análise foi utilizado um planejamento DOE (Design of Experiments) composto central com cinco fatores totalizando trinta e duas (32) condições de aplicação dos cordões. Medições de áreas e dimensões de largura, penetração e reforço foram realizadas nas seções transversais dos cordões depositados utilizando-se um estereoscópio e software de análise de imagens. Além disso, análises dos elementos químicos, nessas seções, foram realizadas utilizando-se espectrometria de energia dispersiva, para determinar o teor do elemento Fe e, por consequência, a diluição. Para a análise do comportamento das variáveis e determinação de um modelo empírico utilizou-se a metodologia de superfície de resposta (RSM – Response Surface Methodology). Verificou-se que todas as variáveis influenciaram na diluição, e com o modelo adotado foi possível obter valores de diluição mínima de 6,37%. Adicionalmente, foram determinadas penetração na faixa 0,37 a 2,16 mm, largura na faixa de 8,09 a 10,04 mm e reforço entre 1,93 a 3,16 mm.Equipment used in offshore oil production are subject to severe damage due toexposure to corrosive compounds present in the produced fluid. Therefore, corrosion resistant materials such as nickel base super alloy UNS N06625 (Inconel® 625), are used in the production fluid passage areas. However, the high cost of this alloy limits its use in all equipment. As a solution to this problem equipment with lower cost materials, overlaid with the noblest alloy, are manufactured. For these overlays the TIG twin hot wire welding process is seen as an option for generate quality weld with productivity. So the aim of this study is to determine the influence of the average current (Im), welding speed (Vs), feed rate (Va), filler material current (Ia) and shielding gas composition (Gs) on the dilution (D), penetration (P), width (W) and reinforcement (R) of the weld beads deposited by TIG twin hot wire welding process on steel AISI / SAE 4130. For this analysis it was used a DOE (Design of) central composite five factors planning totalling thirty-two (32) deposition conditions of weld beads. Using a stereoscopic and image analysis software, measurements of areas and dimensions of width, penetration and reinforcement were made in cross sections of the deposited beads. Furthermore, analysis of the chemical elements in these sections were performed using energy dispersive spectrometry to determine the content of Fe element and hence the dilution. To analyse the behaviour of variables and determine an empirical model, the response surface methodology (RSM - Response Surface Methodology) was used. It was found that all variables influence the dilution, and for the adopted model the minimal dilution obtained was 6.37%. In addition, It was obtained penetration between 0.37 and 2.16 mm, width ranging from 8.09 to 10.04 mm and reinforcement between 1.93 to 3.16 mm.
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Hůlka, Jiří. "Výpočtová predikce tvárného porušování." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-234203.
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The issue of ductile damage prediction can be generally divided in two types of tasks. The first one is to preventing the initiation of ductile damage with is most common group of calculation today. The second task can be described as aimed damaging, such as machining, cutting, etc. The significant development of this issue occurred in recent decades by help of development and access to powerful computational techniques and new experimental possibilities. However, the behaviour of ductile damage at multiaxial proportional and non-proportional loading is insufficiently described. This thesis helped to clarify some of the unknown this topic. It contributed to the understanding of selected materials behaviour at room temperature and quasistatic loading. Austenitic stainless steel AISI 316L was selected for detail study of ductile damage. A large number of experiments were performed on this material, such as uniaxial tensile tests of smooth and notched specimens, upsetting tests of smooth cylinder and special cylinder with dimple, butterfly specimens, notched tube specimens and penetration tests. Experimental results is used for calibration of five so-called simple criteria, taking into account fracture strain and stress triaxiality (Equivalent fracture strain, Johnson-Cook, simplify Bao-Wierzbicki, RT, RTCL) and universal criteria (Bai-Wierzbicki, Xue-Wierzbicki, EMC, LOU, KHPS). SPT potentially enable the determination of actual mechanical behaviour using only a fraction of specimen volume compared to standard specimen. It is promising tool to improve accuracy when assessing working life of components in operation. The inverse numerical simulation loop of SPT was designed using program OptiSLang on the basis of detailed sensitivity analysis. It was achieved 2% deviation of yield strength and 6% deviation of ultimate strength obtained from tensile tests. A several modification of SPT specimen was suggested for universal criteria calibration of small material volume. The 3D numerical model was built for numerical simulation with ductile damage simulation. The criteria KHPS and EMC gave the most accurate results.
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Tau, Lin, and 陶霖. "Microstructural Effects of AISI 4130 Steel on Hydrogen Assisted Fatigue Crack Propagation." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/20031903768876510369.
Full textAbstract:
博士國立臺灣大學
材料科學(工程)研究所
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The main objective of this research has been to carry out a systematic study on the influences of various microstructures of a popular structural steel, AISI 4130 steel, on hydrogen-enhanced fatigue crack propagation. Some important effects have been discussed in this work, including those of microstructure, strength, hydrogen permeation, tempering temperature for tempered martensitic structures, and isothermal treating temperature for bainitic structures. In this work, some conclusions could be outlined: (1) For ferrite/pearlitic structures, the distribution of ferrite/pearlite along the path of hydrogen penetration affected hydrogen diffusivity deeply. Then the results of hydrogen diffusivity can be applied to explain the hydrogen-assisted fatigue crack propagation behavior of the banded and random ferrite/ pearlite structures successfully. (2) The variation of hydrogen-assisted fatigue crack growth rates of specimens sampled from different orientations for banded ferrite/ pearlitic structure was very significant, slight for random in the random ferrite/pearlitic structure. (3) A similar hydrogen-enhanced fatigue crack growth behavior and a transgranular fracture mode were found in bainitic structures, though they have different tensile strength and hydrogen permeation rate. (4) The hydrogen-assisted fatigue crack propagation rate of tempered martensitic structures increased as yield strength increased. In higher strength tempered martensites, an irregular fracture mode, in which the intergranular crack propagated easily near surface of specimen, was found. (5) The microstructural effect was the dominant factor on the hydrogen-assisted fatigue crack growth behavior. Alternatively, the strength effects could not been featured systematically.
Book chapters on the topic "Steel tube AISI 4130"
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Narayana Reddy, B., P. Hema, and G. Padmanabhan. "Influence of CO2 Laser Beam Welding Process Parameters on Mechanical Properties of Alloy AISI 4130 Steel Welded Joints." In Lecture Notes on Multidisciplinary Industrial Engineering, 65–76. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7643-6_6.
Full textConference papers on the topic "Steel tube AISI 4130"
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Roy, Sougata, and Amitava Ghosh. "High Speed Turning of AISI 4140 Steel Using Nanofluid Through Twin Jet SQL System." In ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1067.
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Application of small quantity lubrication (SQL) technology in high speed machining is being recognized as a sustainable approach for achieving suitable cooling/lubrication in machining zone. Present investigation focused on effectiveness of SQL with nanofluids in high speed turning of AISI 4140 steel with a TiN-top coated multilayered carbide insert and explored the advantages of using a twin-jet SQL system instead of a single jet one. SQL system was developed in-house with external-mix nozzles. The experiment was conducted varying the cutting velocity at two different feed rates (0.05mm/rev and 0.10mm/rev) with conventional coolant and nanofluids. Immediate improvement in machinability and the quality of turned surface was observed with twin-jet nanofluid SQL. A significant reduction of force and specific energy could be achieved by using 3vol% alumina and 1vol% multi walled carbon nano tube (MWCNT) nanofluid instead of soluble oil. The MWCNT nanofluid was found to be superior to alumina nanofluid in reduction of tensile residual stress. Such a reduction is typically an indirect indication of reduction of cutting zone temperature, which could be achieved due to enhanced level of lubricity at chip-tool interface and enhanced level of heat dissipation ability of the nanofluids. Improvement in retention of sharpness of tool cutting edges was also observed under nanofluid-SQL environment, which could have played important role in improvement of surface quality.
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Badaruddin, Mohammad, Chaur Jeng Wang, Herry Wardono, Tarkono, and Dwi Asmi. "High-temperature oxidation behavior of aluminized AISI 4130 steel." In INTERNATIONAL SYMPOSIUM ON FRONTIER OF APPLIED PHYSICS (ISFAP) 2015. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4941624.
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Pan, Zhipeng, Yixuan Feng, Xia Ji, and Steven Y. Liang. "Turning Force Prediction of AISI 4130 Considering Dynamic Recrystallization." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-3049.
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Thermal mechanical loadings in machining process would promote material microstructure changes. The material microstructure evolution, such as grain size evolution and phase transformation could significantly influence the material flow stress behavior, which will directly affect the machining forces. An analytical model is proposed to predict cutting forces during the turning of AISI 4130 steel. The material dynamic recrystallization is considered through Johnson-Mehl-Avrami-Kolmogorov (JMAK) model. The explicit calculation of average grain size is provided in an analytical model. The grain size effect on the material flow stress is considered by introducing the Hall-Petch relation into a modified Johnson-Cook model. The cutting forces prediction are based on Oxley’s contact mechanics with consideration of mechanical and thermal loads. The model is validated by comparing the predicted machining forces with experimental measurements.
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Nikhare, Chetan P., Paul McMahon, and Faisal Aqlan. "An Experimental Study on Direct Current Dieless Drawing of 4130 Steel Tubes." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2906.
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Abstract Forming of tubes in various shapes has been a major interest in vehicle, instrumentation, decoration and precision industries. Due to a variety of shapes that can be achieved by tube forming, this manufacturing process has taken a major part in research and application. In this manufacturing process, a tube with a certain diameter and thickness can be considered to shape the part. The shaping or forming can be achieved by end forming, expanding the section, bending the section, buckling the tube, and/or reducing the section. Traditionally, to form these sections the rigid tool, flexible tool or fluid pressure would be needed to shape the tube. However, tools like mandrel or plug and their sizes limit the size of the tube to be formed. In this paper, tubes are formed by stretching them while simultaneously passing the direct current through. This process has been explored earlier by heating the tube using induction heating or rotary laser heating method. However, as no dies or tools are used to form these tubes, the process is considered dieless tube drawing which involves heating the tubes and drawing them into a reduced section. This study considers two different thicknesses but the same outer diameter tubes. The drawing force, shape, and microstructure are investigated. Based on the stress-strain curve, the yield to fracture and tensile to fracture strains are determined and discussed.
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Vysochinskiy, Dmitry, and Dmitri Rybakov. "On the Effect of Various Heat Treatments on Microstructure of AISI 4130 Steel Used in Sour Service Pipes." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18017.
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Abstract Nowadays welding is the most common way to connect metal parts and structures. One of the challenges connected to welding it that heat output from the welding alters the microstructure of the metal creating the heat affected zone (HAZ) near the weld. In steel welds HAZ is often harder and more brittle than the base material due to formation of martensite. This might cause hydrogen induced cracking and speed up the fatigue of the weld. To mitigate the martensite formation in the HAZ different heat treatments, like preheat, interpass and PWHT are often applied. However, for 4130 steel, preheat and interpass temperatures are not expected to restrict martensite formation due to materials slow transformation rate. Preheat and interpass temperatures are still important for hydrogen diffusion and reduction of tension in the weld. This paper investigates the effect of different heat treatments on the microstructure of AISI 4130 steel used in sour service pipes. The welding and sample preparation were performed in accordance with ISO 15156 and ASME B31.3 standards. Two sample sets were produced: one with and one without preheating. The hardness tests of weld profiles were performed in accordance with ISO 15156-2 international standard. Comparison of hardness profiles indicated that preheat had virtually no effect on hardness of the steel in HAZ, although it affected hardness of fusion zone. Preheated samples were further heat treated in a furnace simulating PWHT effect. Three different PWHT condition were tested. The hardness profiles indicated that PWHT led to noticeable changes in steel microstructure. In order to understand those microstructure changes, the heat treatment of the steel during production process was reviewed and microscopic investigations of the weld profiles were performed.
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de Santana, Roneles, Daniel Beltrão, Antonio Marcos Vila Nova, and José Silva. "ANALYSIS OF THE MECHANICAL BEHAVIOR IN THE INTERFACE OF THE BUTTERING WELD OF STEEL AISI 4130 WITH INCONEL 625." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-1663.
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Silva, Fábio dos Santos, Willy Ank de Morais, and Jose Agustin Castillo Lara. "Automotive exhaust system thermal fatigue evaluation in the AISI 409 and AISI 439 stainless steel tube welded joint with AISI 1018 carbon steel flange by GMAW process with AISI 439Ti tubular welding wire and AISI 307Si solid wire." In 2020 SAE Brasil Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2021. http://dx.doi.org/10.4271/2020-36-0017.
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Chandrasekaran, Vishnu Vardhan, and Lewis N. Payton. "Evaluation of Forces, Tool Wear and Surface Finish During Orthogonal Machining AISI 1020 Steel in Three Cutting Environments." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63777.
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A large statistically designed orthogonal tube turning experiment measuring the forces, tool wear and surface finish involved in machining of AISI 1020 steel under four different cutting environments. The environments studied were nitrogen and cold compressed air against dry machining. Each data run consisted of one minute cutting time at two different feeds of 0.002″/rev. and 0.004″/rev. at a constant depth of cut of 0.125″ width of cut using High speed steel tool material inserts. Post-mortem analysis was carried out under a Keyance microscope to evaluate the wear on the rake face. The cutting force and the thrust force are collected during the machining process with a dynamometer and the data is further processed using Labview software. The surface finish on the work piece after the cutting process is also evaluated based on the average roughness measurement taken from a contact type profilometer. The advantages of using such gaseous cutting fluids are discussed.
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Chandrasekaran, Vishnu Vardhan, Lewis N. Payton, and Wesley Scott Hunko. "Performance of Nitrogen and Liquid Nitrogen as Coolants in Orthogonal Machining of AISI 1020 Steel Alloy With Uncoated Carbide Tools." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37032.
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The growing cost associated with insurance, handling and disposing of conventional metal working fluids (oil and water based) continues to drive a need for alternative metal working fluids. An orthogonal tube turning experiment was conducted to study the effects of nitrogen and liquid nitrogen in machining of AISI 1020 steel alloy on a HAAS CNC lathe along with a Kistler Dynamometer to record the force data. Two levels of uncut chip thickness, 0.002” and 0.004” per revolution are maintained with a constant feed and depth of cut of 0.125”. The tool used in this study is an uncoated carbide insert at three different rake angles of 0°, 7° and 15°, with no chip breaker. The statistical design of the experiment established the machining for a duration of 1 minute at each factor level combination. Force data from the dynamometer is analyzed along with wear of the tooling. Tool inserts were studied under a 3-dimensional optical microscope to measure the rake face tool wear. Simple nitrogen produced less wear than the more expensive liquid nitrogen setup.
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Abbassi, Fethi, Furqan Ahmad, Ali Karrech, and Md Saiful Islam. "Analysis of Tube Expansion Using 3D Digital Image Correlation and Numerical Modeling." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10035.
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Abstract Solid Expandable Tubular Technology (SETT) finds its extensive applications in the oil and gas industries where it is used for well completion and remediation. The purpose of his work is to investigate the material behavior upon expansion and to optimize the parameters that are relevant to the expansion process. Tube expansion tests have been performed using a newly designed experimental setup. Seamless stainless steel (AISI 304) tubes have been deformed and monitored using a Digital Image Correlation (DIC) system to measure the full field displacement. A parametric study has been performed in order to study the effect of key expansion parameters such us mandrel geometry (angle), expansion ratio, mandrel-tube friction on the tube expansion and its buckling. The commercial code VIC-3D has been used to process the strain and displacement data obtained by the charge-coupled device (CCD) cameras. Moreover, the tests have been modeled numerically using the Finite Element Method (FEM) to gain further insight into the stress and strain distributions during metal forming. A good correlation has been observed between the numerical and experimental results.