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Rozprawy doktorskie na temat „Structural Properties of Stainless Steel Powder”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Kurian, Sachin. "Process-Structure-Property Relationship Study of Selective Laser Melting using Molecular Dynamics." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/104115.

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Selective Laser Melting (SLM), a laser-based Additive Manufacturing technique has appealed to the bio-medical, automotive, and aerospace industries due to its ability to fabricate geometrically complex parts with tailored properties and high-precision end-use products. The SLM processing parameters highly influence the part quality, microstructure, and mechanical properties. The process-structure-property relationship of the SLM process is not well-understood. In the process-structure study, a quasi-2D model of Micro-Selective Laser Melting process using molecular dynamics is developed to inve

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Smuk, Olena. "Microstructure and properties of modern P/M super duplex stainless steels." Doctoral thesis, KTH, Materials Science and Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3758.

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Sobeih, Mahmoud Omar R. J., and Moazzam Maqsood. "Influence of Hydrogen Charging on Mechanical Properties and Microstructure of Structural Steel S235 & Stainless Steel 316L." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18792.

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The present paper studied the influence of hydrogen on the mechanical properties and microstructure of the materials. This study is done by doing hydrogen charging of steel bar specimens. The two types of steel are used for study, structural steel S235 and stainless steel 316L. The tensile test has been performed to get the data of the charged and uncharged specimens. Different strain rates were used to study the effect of the material after charging. The charging time ranged from 24 hours to 144 hours. The specimens are cylindrical shape. Digital image analysis is performed for the uncharged

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MacDonald, Martin. "The effects of cold forming on material properties and post-yield behaviour of structural sections." Thesis, Glasgow Caledonian University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370009.

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This thesis examines the effects of cold forming on the material properties of steel and stainless steel structural members. Extensive research has been carried out over many years on both of these materials as they are used to manufacture structural sections to various design specifications which exist in many different countries. However, to date, no design code exists in the UK for cold formed stainless steel structural members. A significant amount of research has focused on the localised effect of cold forming on material properties such as the yield and ultimate tensile strengths, partic

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Roos, Stefan. "Process Development for Electron Beam Melting of 316LN Stainless Steel." Licentiate thesis, Mittuniversitetet, Institutionen för kvalitets- och maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-37840.

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Additive manufacturing (AM) is a technology that inverts the procedure of traditional machining. Instead of starting with a billet of material and removing unwanted parts, the AM manufacturing process starts with an empty workspace and proceeds to fill this workspace with material where it is desired, often in a layer-by-layer fashion. Materials available for AM processing include polymers, concrete, metals, ceramics, paper, photopolymers, and resins. This thesis is concerned with electron beam melting (EBM), which is a powder bed fusion technology that uses an electron beam to selectively mel

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Saeidi, Kamran. "Stainless steels fabricated by laser melting : Scaled-down structural hierarchies and microstructural heterogeneities." Doctoral thesis, Stockholms universitet, Institutionen för material- och miljökemi (MMK), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-129055.

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Additive manufacturing is revolutionizing the way of production and use of materials. The clear tendency for shifting from mass production to individual production of net-shape components has encouraged using selective laser melting (SLM) or electron beam melting (EBM). In this thesis, austenitic, duplex and martensitic stainless steel parts were fabricated by laser melting technique using fixed laser scanning parameters. The fabricated steel parts were characterised using XRD, SEM, TEM/STEM, SADP and EBSD techniques. Mechanical properties of the fabricated steel parts were also measured. The

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Stephen, Juanita Peche. "3-D Printing, Characterizing and Evaluating the Mechanical Properties of 316L Stainless Steel Materials with Gradient Microstructure." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/102780.

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Making gradient in the microstructure of metals is proven to be a superior method for improving their mechanical properties. In this research, we 3D print, characterize and evaluate the mechanical properties of 316L Stainless Steel with a gradient in their microstructure. During 3D printing, the gradient in the microstructure is created by tailoring the processing parameters (hatch spacing, scanning speed, and laser power and scanning speed) of the Selective Laser Melting (SLM). The Materials with Graded Microstructure (MGMs) are characterized by optical and scanning electron microscopy (SEM).

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Swartz, Paul. "Evaluation of Tensile Properties for Selective Laser Melted 316L Stainless Steel and the Influence of Inherent Process Features." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2024.

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Optimal print parameters for additively manufacturing 316L stainless steel using selective laser melting (SLM) at Cal Poly had previously been identified. In order to further support the viability of the current settings, tensile material characteristics were needed. Furthermore, reliable performance of the as-printed material had to be demonstrated. Any influence on the static performance of parts in the as-printed condition inherent to the SLM manufacturing process itself needed to be identified. Tensile testing was conducted to determine the properties of material in the as-printed conditio

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9

JANDAGHI, MOHAMMADREZA. "Development of the additively manufactured stainless steel 316L and AlSi10Mg alloys by in situ alloying and post-process treatment." Doctoral thesis, Politecnico di Torino, 2023. https://hdl.handle.net/11583/2976602.

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TAHAEI, Ali. "Investigation on welding and corrosion properties of the UNS S32304 & UNS S32570 duplex stainless steels and development of Nickel-Tungsten Carbide hardfacing by Plasma Transferred Arc (PTA) process." Doctoral thesis, Università degli studi di Ferrara, 2016. http://hdl.handle.net/11392/2403215.

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Gli acciai inossidabili duplex presentano proprietà meccaniche, resistenza alla corrosione e tenacità superiori rispetto agli acciai inossidabili ferritici, austenitici e martensitici. L’ottimo bilanciamento delle loro proprietà è dovuto alla particolare microstruttura che è costituita da percentuali pressoché uguali di ferrite (δ) e di austenite (γ). L’austenite è responsabile della resistenza a corrosione e della tenacità, la ferrite fornisce l’elevata resistenza meccanica; grazie a questa combinazione di proprietà l’acciaio inossidabile duplex offre molti vantaggi rispetto agli acciai inoss

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11

Chang, Ju-Chun, and 張茹鈞. "Microstructure and Mechanical Properties of 440C-NbC Stainless Steel Fabricated by Powder Metallurgy Process." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/74211326110910352826.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>103<br>AISI 440C is a high carbon martensitic stainless steel with excellent hardness, moderate corrosion resistance and good strength. Therefore, it's commonly used in industrial bearings and medical appliances which need both good wear resistance and corrosion resistance. In this study, a spray dried pre-alloyed 400C powder, alloyed with 1.5 wt% Nb, was uniaxially die-pressed, and sintered at temperature ranging from 1250°C to 1290°C in a vacuum furnace. Furthermore, a series heat treatment processes, including austenitizing temperature at 1040°C, N2 gas quenc

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Chen, Yu, and 陳渝. "Study on the Density and Product Properties of Stainless Steel Metal Powder Injection Molding Process." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/8ypxgj.

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碩士<br>中原大學<br>機械工程研究所<br>103<br>Metal Injection Molding (MIM) is a near net shape molding technology which combines plastic injection molding characteristics and powder metallurgy properties. Since MIM involves widely process: granulating, molding design, injection molding, de-binding, sintering and secondary processing, it is hard to have stable quality in final product. Especially, the warpage defect usually appears after de-binding and sintering, which is difficult to remedy. This study aims to improve MIM green part quality in injection molding step, enhance mechanical properties, and incr

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Youseffi, Mansour, K. Y. Chong, and F. M. Jeyacheya. "Enhanced sintering and mechanical properties of 316L stainless steel with silicon additions sintering aid." 2002. http://hdl.handle.net/10454/4072.

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No<br>Alpha phase sintering, sinter hardening, and mechanical properties of prealloyed Fe-1·5Mo base powder with and without additions of elemental Si, ferrosilicon, and carbon under various process conditions have been investigated. Liquid paraffin, as a new lubricating agent, was found to be useful in reducing segregation, interparticle and die wall frictions, as well as reducing ejection forces and die and tool wear. It was found that addition of Si to the base powder enhanced the sintering process by stabilisation of the alpha-phase and formation of two kinds of liquid phase at ~1045 and ~

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Wu, Tung-Ying, and 吳東穎. "Mechanical and Structural Properties of Titanium Alloy to Duplex Stainless Steel Brazed Joints." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/yj85sp.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>102<br>Brazing is a solid state joining process. This bonding technique is based on the atomic diffusion of elements at the brazing interface, which has same physical and mechanical properties as base metal. The majority of applications of brazing for the joining of dissimilar metals, a low-melting point interlayer alloy placed between the bonding surfaces is heated above its melting point and diffuses in base metals to provide a very sound brazed joint. Besides, the temperature of diffusion bonding is much lower than the melting point of the base metal and

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Meng-Jung, Wu, and 吳孟融. "Effects of Silicon Powder Addition and Sigma Phase Precipitation on the Properties of Sintered 303LSC Stainless Steel." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/17094152919207745046.

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碩士<br>南台科技大學<br>機械工程系<br>93<br>The objectives of this work are to investigate the effects of silicon powder addition and sintering temperature on the sinterability , mechanical properties , corrosion and oxidation resistance of sintered 303LSC stainless steels. Influence of vibratory ball-peening on the corrosion and oxidation resistance is also studies. The sinterability , mechanical properties and corrosion resistance are increased with increasing amount of the silicon powder addition. The improvement is resulted from the increasing ferrite content induced by introducing of more silicon powd

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Chang, Ming-Hsin, and 張銘信. "Study of structural and electrochemical properties of carbon film deposited on 304 stainless steel." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/61861242582992666646.

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碩士<br>逢甲大學<br>材料科學所<br>96<br>Metallic bipolar plates for Polymer Electrolyte Membrane Fuel Cells (PEMFC) have the advantages in terms of gas sealing capability, low manufacture cost, high power density and conductivity. However, it is unable to combat corrosion in PEMFC environment to substitute graphite as bipolar plates. Carbon film-coating is mostly by direct pyrolysis of acetylene and the Ni catalyst in catalytic graphitization. In this study, 400 nm-thick Ni layer was applied to 304SS substrates using physical vapor deposition (PVD), then carbon film deposited on this Ni layer by chemical

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Tsai, Yu-Jin, and 蔡育晉. "Effects of Carbon Addition on Liquid Phase Sintering, Mechanical Properties, and Corrosion Behavior of Boron-containing Powder Metallurgy 410L Stainless Steel." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/65ehre.

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碩士<br>國立臺北科技大學<br>材料科學與工程研究所<br>106<br>Liquid phase sintering (LPS) is an economical technique to promote densification of powder metallurgy material. Boron is the best element for liquid phase sintering of iron-based material. In this study, the effects of the boron and carbon elements, sintering temperature (1200℃、1225℃、1250℃、1275℃、1300℃), and sintering atmosphere (vacuum and hydrogen) on the LPS, mechanical performance, and corrosion properties of 410L+0.6 wt% B (ferrite) and 410L + 0.6wt% B + 0.13 wt% C (martensite) stainless steels were investigated. The results of thermal analysis indica

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Jyun-Sian, Liou, and 劉俊賢. "Studies on selective leaching properties of TiNiFe shape memory alloys and surface characteristics of the 316L stainless steel modified by ethylene vinyl acetate powder/chitosan composite films." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/46151782634170561122.

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碩士<br>國立宜蘭大學<br>化學工程與材料工程學系碩士班<br>104<br>The first part of this study is to investigate the selective leaching and surface characteristics of Ti50Ni50-xFex(x = 1, 2, and 3) shape memory alloys using inductively coupled plasma mass spectrometry, X-ray diffractometry, electrochemical tests, and X-ray photoelectron spectroscopy. In our results, the concentrations of Ni and Fe ions selectively leached from each specimen were considerably higher than that of Ti ions. Electrochemical tests revealed a gradual deterioration in the corrosion resistance of Ti50Ni50-xFex SMAs as the Fe content in the all

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