Academic literature on the topic 'Sinter (Metallurgy) Powder metallurgy'

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Journal articles on the topic "Sinter (Metallurgy) Powder metallurgy"

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Donaldson, I. W. "High Thermal Conductivity Aluminum Powder Metallurgy Materials." Materials Science Forum 783-786 (May 2014): 120–25. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.120.

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High thermal conductivity aluminum has special advantages for electronic packaging and thermal management applications because of the combination of excellent thermal conductivity and relatively low density. Recent development of new press-and-sinter aluminum materials with low levels of alloying that sinters to a high density yielding a high thermal conductivity approaching the theoretical value for pure aluminum. The sintered materials possess thermal conductivity (TC) exceeding 200 w/m-oK (typically 215 – 230 w/m-oK), which makes it unique, since cast and wrought aluminum materials typically fall below 175 w/m-oK. This allows the benefits of powdered metal for low cost manufacturing at high volumes of parts to be realized. This unique combination of low cost and high TC makes these materials an attractive alternative to higher TC materials such as copper. In addition, a metal matrix composites (MMCs) press and sinter approach to tailoring the coefficient of thermal expansion (CTE) can also be used.
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Hwang, K. S., M. W. Wu, and Chia Cheng Tsai. "High Strength Sinter-Hardening Powder Metallurgy Alloys." Advanced Materials Research 51 (June 2008): 3–9. http://dx.doi.org/10.4028/www.scientific.net/amr.51.3.

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High strength and high hardness can be readily attained after sintering when sinter-hardening grade powder metallurgy alloys are used. However, fast cooling rates greater than 60°C/min are usually required. This increases the cost of the sintering equipment and maintenance. To lower the required minimum cooling rate, the homogeneity of the alloying elements in the matrix and the hardenability of the material must be improved. Among the various popular alloying elements, nickel and carbon are the two most non-uniformly distributed elements due to their repelling effect. It is found that to improve their homogenization, the addition of Cr and Mo can alleviate the repelling effect between Ni and C. As a result, weak Ni-rich/C-lean ferrite and austenite are eliminated and replaced by hard bainite and martensite. A tensile strength of 1323 MPa and a hardness of 39 HRC are attained in sinter-hardened Fe-3Cr-0.5Mo-4Ni-0.5C compacts without any quenching treatment.
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Zhang, Han Liang, Hui Ping Tang, Zeng Feng Li, and Chang Shu Xiang. "Preparation of Tin - Titanium Alloy in Powder Metallurgy Method." Advanced Materials Research 490-495 (March 2012): 3376–81. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.3376.

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Tin - Titanium alloy has been prepared by powder metallurgy method. By the way of preparing pre-alloyed metal and fully fine to ultra fine powder, optimizing sintering techniques, the Problem of enrichment of titanium from the alloy has been solved, the Tin - Titanium alloy with its homogeneous distribution elements has been made. Then the Tin-titanium strap has been processed successfully. In this paper, the key process to make Ti -Titanium alloy by Powder Metallurgy Method is introduced. The factors which affect the uniform components of the alloy have been mainly analyzed, such as ultra fine powder of pre-alloyed metal, diffusing sinter at lower temperature .etc. The results indicate that powder metallurgy with ultra fine powder additive and diffusing sinter at lower temperature is the efficient method to solve titanium element in the alloy segregate.
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Wang, Yan Jun, and Zuo Min Liu. "Micro-Pore Structure and Mechanical Properties of High Temperature Self-Lubricating Biomimetic TiC/FeCrWMoV Cermets." Materials Science Forum 546-549 (May 2007): 2273–78. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.2273.

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A new cermet sinter with sweat-gland micro-pore structure has been developed by powder metallurgy technology in vacuum. The effects of the pore-forming materials on micro-pore structure and Y2O3 additions as well mechanical properties of TiC/FeCrWMoV cermets were investigated. Some typical sweat-gland micro-pores were formed while compound additives TiH2 and CaCO3 adding into the sinter matrix. The porosity of the cermet sinters changes from 20% to 28% with the compound additives from 6% to 8%, and the micro-pores of sinters exist a regularized and interpenetrated network structure just like human’s sweat-gland one and obeying to Rayleigh Distribution. As such the sinters could be easily infiltrated with high-temperature solid lubricant. For improving the property of the ceramet sinter, the elements Y2O3 of 0.6~0.8% (vol. fraction ) was also added into the sinter matrix and its effect on the sinter has been also discussed .
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Jiang, Z., C. Lucien Falticeanu, and I. T. H. Chang. "Warm Compression of Al Alloy PM Blends." Materials Science Forum 534-536 (January 2007): 333–36. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.333.

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With the onging trend of reducing the weight of automotive parts, there is also an increasing trend in the use of light alloys. Recently, aluminum powder metallurgy has been the subject of great attention due to the combination of the lightweight characteristics of aluminium and the efficient material utilisation of the powder metallurgical process, which offer attractive benefits to potential end-users. Conventional press and sinter route of non-ferrous P/M products are based compaction at room temperature prior to the sintering cycle. However, warm compaction process has successfully provided increased density in ferrous powder metallurgy parts, which contributes to better mechanical properties and consequently overall performance of those parts. This study is aimed at exploring the use of warm compaction process to aluminium powder metallurgy. This paper presents a detailed study of the effect of warm compression and sintering conditions on the resultant microstructures and mechanical properties of Al-Cu-Mg-Si PM blend.
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Petroni, S. L. G., E. T. Galvani, Carlos Alberto Alves Cairo, C. C. Girotto, and V. A. R. Henriques. "Evaluation of Press-and-Sinter Processing Parameters in Titanium Hydride Powder Metallurgy." Key Engineering Materials 704 (August 2016): 94–103. http://dx.doi.org/10.4028/www.scientific.net/kem.704.94.

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The use of hydrogenated titanium powders combined with traditional PM techniques may lead to a significant reduction in the manufacturing costs of titanium components. In this work, the advantages and limitations of the use of TiH2 powder consolidated through the conventional press-and-sinter method were investigated. Processing parameters related to the compaction and sintering were studied for a TiH2 powder in the particle sizes <355 μm, <150 μm and <45 μm. Optimized compaction conditions were achieved by using admixed lubricant and compaction pressure of 800 MPa. The mechanisms involved in the compaction of powders were detailed through the fit of compressibility data to a theoretical model originally developed for titanium powders. Densification of samples was favored by the reduction in particle size and increase in sintering temperature up to 1300 °C. The positive effects of hydrogen release during dehydrogenation were verified through the results of sintered densities and the reduction of oxygen levels. Limitations were observed mainly regarding the flowability of powders and the difficulty to achieve full densification.
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Kandavel, TK, R. Sravanesh, and P. Karthikeyan. "Optimization of working parameters on wear behaviour of the sinter-forged plain carbon steel." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 231, no. 8 (October 24, 2015): 1379–88. http://dx.doi.org/10.1177/0954405415592200.

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Powder metallurgy plain carbon steel (Fe–0.5% C) replaces gradually the conventional C45 steel in all industrial sectors due to its comparable strength and better metallurgical properties. This research investigates the influence of density/porosity of powder metallurgy plain carbon steel on wear characteristics and optimizes the wear working parameters to establish minimum wear loss and coefficient of friction during wear using Taguchi-grey relational optimization analysis. The sintered steel preforms were subjected to uni-axial compressive load (cold upset) to obtain various percentage theoretical densities. The wear test specimens made out of various densities of the sinter-forged plain carbon steel were used to conduct wear tests as per the test plan generated by the Design Expert software. The optical and scanning electron microscope images taken from the worn test specimens were used for the investigations of wear mechanisms of the alloy steel. It is observed from the wear test results that the porosity in the powder metallurgy plain carbon steel has a vital role in wear properties of the steel. It has also been found that the optimized working parameters such as speed and load are found as same irrespective of the densities of the plain carbon steel.
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Ahamed, Riaz, Reza Ghomashchi, Zonghan Xie, and Lei Chen. "Powder Metallurgy Synthesis of Heusler Alloys: Effects of Process Parameters." Materials 12, no. 10 (May 15, 2019): 1596. http://dx.doi.org/10.3390/ma12101596.

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Ni45Co5Mn40Sn10 Heusler alloy was fabricated with elemental powders, using a powder processing route of press and sinter, in place of vacuum induction melting or arc melting route. The effects of process parameters, such as compaction load, sintering time, and temperature, on the transformation characteristics and microstructures of the alloy were investigated. While the effect of compaction pressure was not significant, those of sintering time and temperature are important in causing or annulling martensitic transformation, which is characteristic of Heusler alloys. The processing condition of 1050 °C/24 h was identified to be favorable in producing ferromagnetic Heusler alloy. Longer durations of sintering resulted in an increased γ-phase fraction, which acts as an impediment to the structural transformation.
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Bao, Chong Xi, Zhou Qiang Shen, and Zheng Ping Shu. "The Application of P/M Advanced Techniques to Sintered Gears." Materials Science Forum 534-536 (January 2007): 321–24. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.321.

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The processes of P/M affect the properties of sintered gears. The different techniques of P/M lead to the different properties of sintered gears. This paper summarizes new progress in powder metallurgy for sintered gears. These progresses include warm compaction, high velocity compaction, sinter hardening, high temperature sintering, infiltration, CNC powder press and surface densification etc.
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Danninger, Herbert. "Perspectives of Powder Metallurgy in the 2020s." Advanced Engineering Forum 34 (October 2019): 18–27. http://dx.doi.org/10.4028/www.scientific.net/aef.34.18.

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In the automotive industry there is a clear trend towards alternative drivetrain systems, away from the classical internal combustion – gasoline or diesel - engines. This poses a challenge to the traditional markets of powder metallurgy, the ferrous precision parts for automotive engines and transmissions which form the major tonnage of today’s powder metallurgy [1, 2], but also the hardmetal tools for machining automotive components from stock material or for finishing [3]. To counter these trends, powder metallurgy can rely on its high flexibility regarding materials, geometries, processing and properties and finally applications, which enables PM to adapt itself to changing requirements in a changing industrial environment [4]. In the present article, examples are given both for PM precision parts and hardmetals but also functional materials such as soft magnetic composites. It is shown that the potential of ferrous PM parts regarding mechanical performance is still higher than currently used, high and graded density being attractive ways [5]. Also the use of advanced alloying systems offers economical and technical advantages and should enable PM to enter non-automotive markets for precision parts. In the hardmetal branch, non-automotive applications, e.g. in construction and mining, should be considered while from the material viewpoint replacing tungsten and in particular Co as binder metal are intensely studied. PM functional materials such as Fe-Ni, Fe-Co and in particular soft magnetic composites will find markets in electrical drive systems [6], enabling new designs for electric motors. On the other end of the spectrum, superhard rare earth magnets are regularly produced by the powder route. Finally, the multitude of additive manufacturing techniques offers chances for powder metallurgy since most of these processes start from metal powders [7]. In addition to the well known laser and electron beam based “direct” AM systems, also indirect, binder-based, variants are attractive, avoiding many problems encountered with the direct systems and enabling transfer of knowhow accumulated in metal injection moulding. In general, future will show how many other technologies and products has to offer in addition to the classical press-and-sinter routes which however will remain for their specific product groups. when designing your figures and tables, etc
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Dissertations / Theses on the topic "Sinter (Metallurgy) Powder metallurgy"

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Johnston, Scott R. "Initial stage sintering model of 316L stainless steel with application to three dimensionally printed (3DPtm) components /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/7052.

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Feng, Kai. "Development of a dilatometer and mass spectrometer system for studying gas phase reactions during sintering /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3074400.

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Rhodes, Nigel Anthony. "The growth, structure and properties of sinter-necks in mixed ferrous powder systems." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263406.

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Thompson, J. Kyle. "Study of powder metal press and sinter process and its tool wear." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-07062007-113955.

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Das, Suman. "Direct selective laser sintering of high performance metals : machine design, process development and process control /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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ROCHA, JOSE C. da. "Estudo da influencia das caracteristicas do po de nitreto de silicio sobre a sinterabilidade e propriedades mecanicas do sinterizado." reponame:Repositório Institucional do IPEN, 1995. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10439.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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Hall, Emily. "Modelling the influence of porosity on fatigue strength of sintered steels." Thesis, Uppsala universitet, Strukturkemi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-398977.

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The pores in pressed and sintered components constitute weak points in the material since the stress concentration is larger than the nominal stress there. Therefore, fatigue cracks initiate at the pores. Specifically, it can be assumed that the fatigue cracks initiate at the largest pore in the stressed volume. Studies have previously looked at finding ways to model the fatigue strength of the material based on the largest pore. This thesis looks at a model previously derived for hardened pressed and sintered materials that is based on linear elastic fracture mechanics and investigates if said model can be modified to include non-hardened pressed and sintered materials that do not necessarily behave linear elastically. A model describing the influence of the size of the largest pore on the fatigue limit using empirical coefficients is suggested. Furthermore, the area of the largest pore is modelled using extreme value statistics. The model proved successful in modelling the density effect of the porosity on the fatigue strength for two materials with different microstructures: one with a homogeneous microstructure and one with a heterogeneous microstructure. For the material with the homogenoeous microstructure the model also accounted well for the notch effect when tested on samples with a different geometry. However, for the heterogeneous material the model did not account for the notch effect. Deformation hardening due to local plastic deformation in the softer phases was suggested as a possible explanation and was supported by tensile tests.
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Ferreira, Carlos Antônio. "Desenvolvimento de núcleos para transformadores monofásicos de baixa potência pela metalurgia do pó." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/55438.

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O objetivo principal do projeto foi desenvolver, através da metalurgia do pó (M/P), núcleos para transformadores monofásicos de baixa potência. O processo compreende o desenvolvimento de ligas metálicas utilizando pós de ferro, níquel e resina fenólica HRJ. Essas ligas foram misturadas, compactadas e sinterizadas ou curadas, conforme o tipo de liga. Após a confecção dos protótipos, foram feitos testes relacionados às características eletromagnéticas. A partir dos resultados obtidos puderam-se fazer comparações entre um transformador convencional, construído com um núcleo de chapas laminadas de Fe-Si com os núcleos maciços confeccionados utilizando-se a metalurgia do pó. Entre os transformadores construídos a partir da metalurgia do pó, também puderam ser observados os comportamentos com núcleos formados a partir de pó de ferro, liga de ferro e níquel, que foram sinterizados e ainda uma liga de ferro com 1% de resina fenólica HRJ que foi curada para obtenção do núcleo magnético.
The main goal this design was to develop, through process of powder Metallurgy, single-phase transformer cores for low Power. The process include the development alloys using powders of iron, nickel and phenolic resin HRJ. These alloys were mixed, compacted and sintered or cured, according to the type of alloy. After the prototype creation, tests were made related to the electromagnetic characteristics. When the results were ready comparisons were made between a conventional transformer, built with a Fe-Si rolled sheet core and bulky cores made using the powder metallurgy. Between transformers built from the powder metallurgy, could also be observed behaviors with cores formed from iron powder, iron and nickel alloy that was sintered and observed too an iron alloy with 1% phenolic resin HRJ was cured to obtain the magnetic core.
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Franke, Peter. "Herstellung und Charakterisierung von Keramik-Matrix-Verbundwerkstoffen mit Metallpartikel- oder Metallfaserverstärkung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232969.

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Die exzellenten Eigenschaften einer Keramik beziehen sich auf den hohen Schmelzpunkt, die gute Hochtemperaturfestigkeit sowie hohe Elastizitätsmodul- und Härtewerte. Weiterhin zeichnen sich die anorganisch-nichtmetallischen Werkstoffebesonders durch ihre gute Korrosions- und Verschleißbeständigkeit aus.Bedingt durch die erschwerte Versetzungsbewegung weisen keramische Werkstoffeeine höhere Sprödigkeit auf. Metallische Werkstoffedagegen sind in der Regel duktil und zeigen meist ein duktiles Bruchverhalten. Lokale Spannungsspitzen können durch plastische Verformung abgebaut werden.Das Ziel dieser Arbeit ist es, das grundsätzlich unterschiedliche Werkstofferhalten einer Keramik und eines Metalls miteinander zu kombinieren, um die Bruchzähigkeit des Keramik-Metall-Verbundwerkstoffes zu erhöhenDie fein verteilten Metalle sollen die Rissausbreitung behindern. Es können unterschiedliche Mechanismen wirken. Im Vergleich zur unverstärkten Keramik ist eine höhere Bruchenergie aufzubringen, um den Riss voran zu treiben. Die Erhöhung der Bruchenergie spiegelt sich in einer höheren Bruchzähigkeit wieder.Um eine duktile Phase in einer spröden Zirkoniumdioxidmatrix zu erzeugen, werden für die Untersuchungen unterschiedliche Metalle eingebracht. Dadurch soll die Bruchzähigkeit als Schadenstoleranz gegenüber dem Totalversagen erhöht werden. Die resultierenden Eigenschaften der Keramik-Metall-Verbundwerkstoffewerden analysiert und charakterisiert.Die Untersuchungen umfassen das pulvermetallurgische Einbringen von metallischen Pulvern mit verschiedenen Teilchengrößen sowie die chemische Einbringung von Präkursoren, die in nanokristalline Metallpartikel umgewandelt werden. Dabei kommen verschiedene Metalle mit unterschiedlichen Wechselwirkungen und Spannungen durch thermische Fehlpassungen in der Matrix zur Anwendung. Zusätzlich wird die Auswirkung der Variation der Verstärkungsform (Partikel/Faser) und des Metallgehaltes untersucht.
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Jordaan, Willem Jacobus. "The variation of sinter strength in the sinter bed due to the mineral phase distribution." Diss., Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-07012005-124327/.

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Books on the topic "Sinter (Metallurgy) Powder metallurgy"

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Internationale Pulvermetallurgische Tagung (9th 1989 Dresden, Germany). Sintern: Phänomene, Technologien und Werkstoffe : [die IX. Internationale Pulvermetallurgische Tagung vom 23. bis 25. Oktober 1989 in Dresden, DDR. Dresden: Das Zentralinstitut, 1989.

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Thomas, Karyn L. Powder metallurgy. Norwalk, CT: Business Communications Co., 1991.

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Swift, Thomas Kevin. Powder metallurgy. Norwalk, CT: Business Communications Co., 1994.

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Šalak, Andrej. Ferrous powder metallurgy. Cambridge: Cambridge International Science Pub., 1995.

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Rittner, Mindy N. Nonferrous powder metallurgy. Norwalk, CT: Business Communications Co., 1999.

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Engineers, Society of Automotive. Powder metallurgy, 2006. Warrendale, PA: SAE International, 2006.

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Beiss, P., R. Ruthardt, and H. Warlimont, eds. Powder Metallurgy Data. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/b88278.

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Rittner, Mindy N. Ferrous powder metallurgy. Norwalk, CT: Business Communications Co., 1998.

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German, Randall M. Powder metallurgy science. 2nd ed. Princeton, N.J: Metal Powder Industries Federation, 1994.

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Klar, Erhard. Powder metallurgy stainless steels. Materials Park, OH: ASM International, 2007.

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Book chapters on the topic "Sinter (Metallurgy) Powder metallurgy"

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Lindsley, Bruce, and Thomas Murphy. "Dimensional Precision in Sinter-Hardening PM Steels." In Progress in Powder Metallurgy, 665–68. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.665.

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Millot, Sten Pierre. "Sinter Forged MMC Components for Wear-Parts." In Progress in Powder Metallurgy, 925–28. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.925.

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Pieczonka, Tadeusz, and Jan Kazior. "Sinter-Bonding of Iron Based Compacts Containing P and Cu." In Progress in Powder Metallurgy, 633–36. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.633.

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Wang, Chong Lin, Ping Wang, and Zai Min Shi. "Fatigue Properties for Sinter-Hardened Fe-Ni-Mo-Cu Materials." In Progress in Powder Metallurgy, 677–80. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.677.

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Kollo, Lauri, Jüri Pirso, and Kristjan Juhani. "Effect of Sinter/HIP Technology on Properties of TiC-NiMo Cermets." In Progress in Powder Metallurgy, 1169–72. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.1169.

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Jansson, P. "Soft magnetic sintered and composite materials." In Powder Metallurgy Data, 546–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/10689123_29.

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Dobrzański, Leszek A., Z. Brytan, Marco Actis Grande, and Mario Rosso. "Sintered Duplex Stainless Steels Corrosion Properties." In Progress in Powder Metallurgy, 721–24. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.721.

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Zendron, Marianna, Alberto Molinari, and Luca Girardini. "Hardenability of Low Alloy Sintered Mn Steels." In Progress in Powder Metallurgy, 625–28. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.625.

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Bao, Chong Xi, Zhou Qiang Shen, and Zheng Ping Shu. "The Application of P/M Advanced Techniques to Sintered Gears." In Progress in Powder Metallurgy, 321–24. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.321.

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Sun, Lan, Cheng Chang Jia, and Hua Tang. "Research on Two Sintered Techniques of Nanometer WC-Co Powder." In Progress in Powder Metallurgy, 593–96. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.593.

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Conference papers on the topic "Sinter (Metallurgy) Powder metallurgy"

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Dhoka, Sahil, Scott W. Wagner, Himansshu Abhi, Nicholas V. Hendrickson, and William J. Emblom. "Integrating Friction-Stir Back Extrusion to Powder Metallurgy." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-64052.

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Abstract Reducing fuel consumption has been a driving factor for researchers and manufacturers to continually develop improved methods for reducing the weight of automobiles or lightweighting. These vehicle lightweighting demands have directed researchers to look to using materials that are typically more difficult to manufacture in their studies. As a result, friction stir processing techniques are being looked at more closely. There are advantages to using friction stir methods. Dissimilar metals can be welded and fine-grained products can be created using friction stir methods to name a few. It can be an ideal solution for manufacturing high-conductive metals and alloys. Foamed aluminum tube similar to the one shown by Yoshiko Hangai et al [1] can be formed using the proposed process which could be used to develop lightweight automobile components. This paper provides preliminary results and insights gained when fine metal powders were used in a friction stir back extrusion (FSBE) setup. The tooling consisted of a D2 tool steel die with an H13 rotating probe mounted in a CNC mill. Within the die, commercially pure aluminum powder was topped by an aluminum cap with a milled pocket in the center. This pocket was used to locate the spin tool in the center of the cap and reduce the potential for the tool to drift and deflect. The cap was also used for compacting the powdered aluminum. X-ray diffraction indicated that Al13Fe4 was formed, indicating that the temperature within the die reached a minimum of 800°C and also indicated that the powder had the potential to partially sinter and melt.
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Faisal, Heny, Darminto, Triwikantoro, and M. Zainuri. "Interfacial reactions and wetting in Al-Mg sintered by powder metallurgy process." In THE 3RD INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS SCIENCE AND TECHNOLOGY (ICAMST 2015). Author(s), 2016. http://dx.doi.org/10.1063/1.4945471.

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Bjurstro¨m, Martin, and Carl-Gustaf Hjorth. "Producing HP Pump Barrels Utilizing Powder Metallurgy and Hot Isostatic Pressing." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77787.

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The fabrication of near net shape powder metal (PM) components by hot isostatic pressing (HIP) has been an important manufacturing technology for steel and stainless steel alloys since about 1985. The manufacturing process involves inert gas atomization of powder, 3D CAD capsule design, sheet metal capsule fabrication and densification by HIP in very large pressure vessels. Since 1985, several thousand tonnes of parts have been produced. The major applications are found in the oil and gas industry especially in offshore applications, the industrial power generation industry, and traditional engineering industries. Typically, the components replace castings, forgings and fabricated parts and are produced in high alloy grades such as martensitic steels, austenitic stainless steels, duplex (ferritic/austenitic) stainless steels and nickel based superalloys. The application of PM/HIP near net shapes to pump barrels for medium to high pressure use has a number of advantages compared to the traditional forging and welding approach. First, the need for machining of the components is reduced to a minimum and welding during final assembly is reduced substantially. Mechanical properties of the PM/HIP parts are isotropic and equal to the best forged properties in the flow direction. This derives from the fine microstructure using powder powder and the uniform structure from the HIP process. Furthermore, when using the PM HIP process the parts are produced near net shape with supports, nozzles and flanges integrated. This significantly reduces manufacturing lead-time and gives greater design flexibility which improves cost for the final component. The PM HIP near net shape route has received approval from ASTM, NACE and API for specific steel, stainless steel and nickel base alloys. This paper reviews the manufacturing sequence for PM near net shapes and discusses the details of several successful applications. The application of the PM/HIP process to high pressure pump barrels is highlighted.
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Bjurstro¨m, Martin, and Carl-Gustaf Hjorth. "Producing HP Pump Barrels Utilizing Powder Metallurgy and Hot Isostatic Pressing." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11209.

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Abstract:
The fabrication of near net shape powder metal (PM) components by hot isostatic pressing (HIP) has been an important manufacturing technology for steel and stainless steel alloys since about 1985. The manufacturing process involves inert gas atomization of powder, 3D CAD capsule design, sheet metal capsule fabrication and densification by HIP in very large pressure vessels. Since 1985, several thousand tonnes of parts have been produced. The major applications are found in the oil and gas industry especially in offshore applications, the industrial power generation industry, and traditional engineering industries. Typically, the components replace castings, forgings and fabricated parts and are produced in high alloy grades such as martensitic steels, austenitic stainless steels, duplex (ferritic/austenitic) stainless steels and nickel based superalloys. The application of PM/HIP near net shapes to pump barrels for medium to high pressure use has a number of advantages compared to the traditional forging and welding approach. First, the need for machining of the components is reduced to a minimum and welding during final assembly is reduced substantially. Mechanical properties of the PM/HIP parts are isotropic and equal to the best forged properties in the flow direction. This derives from the fine microstructure using powder powder and the uniform structure from the HIP process. Furthermore, when using the PM HIP process the parts are produced near net shape with supports, nozzles and flanges integrated. This significantly reduces manufacturing lead-time and gives greater design flexibility which improves cost for the final component. The PM HIP near net shape route has received approval from ASTM, NACE and API for specific steel, stainless steel and nickel base alloys. This paper reviews the manufacturing sequence for PM near net shapes and discusses the details of several successful applications. The application of the PM/HIP process to high pressure pump barrels is highlighted.
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Wong, W. L. E., and M. Gupta. "Development of Mg/Cu Nanocomposites Using Microwave Assisted Powder Metallurgy Technique." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79268.

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In the present study, magnesium composites containing different amount of nano-size copper particulates were successfully synthesized using powder metallurgy technique coupled with a novel microwave assisted rapid sintering. Mg/Cu nanocomposites were sintered using a hybrid heating method consisting of microwaves and radiant heat from external susceptors. The sintered specimens were hot extruded and characterized in terms of microstructural, physical and mechanical properties. Microstructural characterization revealed minimal porosity and the presence of a continuous network of nano-size Cu particulates decorating the particle boundaries of the metal matrix. Mechanical characterization revealed that the addition of nano-size Cu particulates lead to an increase in hardness, 0.2% yield strength (YS) and ultimate tensile strength (UTS) of the matrix. An attempt is made in the present study to correlate the effect of increasing presence of nano-size Cu reinforcement on the microstructural, physical and mechanical properties of monolithic magnesium.
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Gyimah, Glenn K., Dong Chen, and Ping Huang. "Dry Sliding Wear Studies of Cu-Based Powder Metallurgy Brake Materials." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85270.

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A novel friction material based on Cu-based powder with several additional elements, such as Al, SiO2, Fe, graphite, Sn, Mn and MoS2, has been developed by PM techniques in order to study the wear to improve mechanical and tribological characteristics of train brake pads. The materials used were sintered at three different temperatures (850°C, 900°C and 950°C). A high pressure pad-on-disc braking tester was developed to test the wear behavior of these materials without lubrication. Wear was measured by microscopic examination of the pad after the tribometer test. The tests showed that the coefficient of friction (COF), wear rate and wear number were improved immensely by high temperature sintering. This shows that the sintering temperature level plays an important role in the performance of the braking material. In addition, the tribological and the mechanical properties were found to be temperature sensitive.
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Marin, Mihaela. "EXPERIMENTAL AND PREDICTION OF POROSITY IN SOME SINTERED IRON-BASED POWDER METALLURGY MATERIALS BY USING ARTIFICIAL NEURAL NETWORKS." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/6.1/s24.028.

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8

Laoui, Tahar, Abbas Saeed Hakeem, Kachalla Abdullahi, Nouari Saheb, and Nasser Al-Aqeeli. "Effect of Consolidation Mechanism on the Properties of Nanostructured WC-6, 9, 12 wt%Co Hardmetals." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63643.

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The development of nanostructured materials has been exploited in enormous applications nowadays owing to the remarkable properties possessed by these advanced materials. Among these materials are tungsten carbide (WC)-based alloys, which have been widely used in a range of industrial applications including cutting and drilling tools, wear resistant components in wire drawing, and wear resistant surfaces in various equipments and dies. These alloys are processed using a variety of techniques in which powder metallurgy has been widely adopted. The key challenge lies in retaining the nanostructure of WC-based powders after the consolidation stage that is used to obtain dense parts following powder metallurgy processing. In the present study, the densification parameters, microstructural development and mechanical behavior of WC containing 6, 9 and 12wt. %Co powders in the range of nanometer to micron size of WC particles were investigated. Two types of consolidation techniques were considered namely spark plasma sintering (SPS) and microwave sintering (MW) for a comparative analysis as well as to explore the suitable process that will minimize grain growth. The consolidated (sintered) samples were characterized by X-ray diffraction, scanning electron microscopy, and hardness measurement.
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Pandey, Krishna Murari, Guttikonda Manohar, and Saikat Ranjan Maity. "Effect of China Clay on Mechanical Properties of AA7075/B4C Hybrid Composite Fabricated by Powder Metallurgy Techniques." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24418.

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Abstract Composite materials are very predominant in the areas of industrial applications, aerospace and defense sectors. Aluminium metal matrix composites are main targeted materials by many researchers because of its low density, high strength, corrosion resistance and economical that makes material suitable for aerospace and automobile sectors. In this work effect of china clay volume fraction on mechanical properties of AA7075/B4C composite was investigated. Effect of china clay volume fraction on mechanical properties was analyzed with the help of results obtained by XRD, tensile, compression and micro hardness tests. From the experimentation analysis and results it was clear that added china clay acts as effective binder material for efficient compaction and ejection of green compacts from the die material after cold compaction processes and gives high strength to the composite material up to 7% volume fraction in sintered composite while in tensile strength after that material strength starts to degrade. In this work critical volume fractions of china clay in AA7075/B4C composite was investigated in tensile, compression and hardness. Further, effect of heat treatment on mechanical properties of the composite material was investigated.
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Amine, Tarak, Joseph W. Newkirk, and Ronald J. O’Malley. "Evaluating Material Property Variations in Components With Difficult Geometries." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71828.

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All manufacturing methods produce components which have some degree of inhomogeneous properties. Part properties may vary with location in most fabrication methods including additive manufacturing, casting, forging, welding, and surface modifications. Standard tensile test specimens cannot provide a good map of the properties of the material, except for only the largest of components or simplest of geometries. For example, simple curved shapes, such as pipes cannot be reliably evaluated by straight tensile specimens unless the pipe diameter is large enough to have a sufficiently low curvature from which flat specimens can be machined. This paper will look at part property variations in various components made by different fabrication methods, which include selective laser melting, press and sinter powder metallurgy, rolling and casting. Subsize tensile specimens developed at the Missouri University of Science and Technology have been used to map out material properties with location. This method of mapping out properties provides new information which could be valuable to quality control, process control, and design of components.
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Reports on the topic "Sinter (Metallurgy) Powder metallurgy"

1

Flumerfelt, J. F. Aluminum powder metallurgy processing. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/348922.

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2

McEvily, A. J. The Fatigue of Powder Metallurgy Alloys. Fort Belvoir, VA: Defense Technical Information Center, March 1985. http://dx.doi.org/10.21236/ada158591.

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Lowden, Richard Andrew, James O. Kiggans Jr., Stephen D. Nunn, and Randy J. Parten. Powder Metallurgy Fabrication of Molybdenum Accelerator Target Disks. Office of Scientific and Technical Information (OSTI), July 2015. http://dx.doi.org/10.2172/1256794.

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Turgut, Zafer, John C. Horwath, and Richard T. Fingers. Powder Metallurgy Processing of High-Strength FeCo Alloys (Preprint). Fort Belvoir, VA: Defense Technical Information Center, September 2008. http://dx.doi.org/10.21236/ada488099.

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Skoglund, Paul, Ola Litstrom, and Anders Flodin. Improvement of Powder Metallurgy Gears for Engines and Transmissions. Warrendale, PA: SAE International, October 2013. http://dx.doi.org/10.4271/2013-32-9102.

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Fraser, Hamish L. Rapid Solidification Processing and Powder Metallurgy of Al Alloys. Fort Belvoir, VA: Defense Technical Information Center, October 1986. http://dx.doi.org/10.21236/ada174553.

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Lazarus, L. J. Milling and Drilling Evaluation of Stainless Steel Powder Metallurgy Alloys. Office of Scientific and Technical Information (OSTI), December 2001. http://dx.doi.org/10.2172/789448.

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Jones, Tyrone, and Katsuyoshi Kondoh. Initial Evaluation of Advanced Powder Metallurgy Magnesium Alloys for Armor Development. Fort Belvoir, VA: Defense Technical Information Center, May 2009. http://dx.doi.org/10.21236/ada500566.

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Lavender, Curt A., Vladimir S. Moxson, and Volodymr Duz. Cost-Effective Production of Powder Metallurgy Titanium Components for High-Volume Commercial Applications. Office of Scientific and Technical Information (OSTI), October 2010. http://dx.doi.org/10.2172/1009762.

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Peter, William H., David Gandy, and Robert Lannom. Additively Manufactured, Net Shape Powder Metallurgy Cans for Valves Used in Energy Production. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1427630.

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