Search Results - "German, Randall"

Progress in Titanium Metal Powder Injection Molding by German, Randall M

“…Metal powder injection molding is a shaping technology that has achieved solid scientific underpinnings. It is from this science base that recent progress has…”
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Titanium sintering science: A review of atomic events during densification by German, Randall M.

“…The sintering densification trajectory for titanium powder is identified in terms of the interaction between mass transport processes and microstructure…”
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Coarsening in Sintering: Grain Shape Distribution, Grain Size Distribution, and Grain Growth Kinetics in Solid-Pore Systems by German, Randall M.

“…Sintering occurs when packed particles are heated to a temperature where there is sufficient atomic motion to grow bonds between the particles. The conditions…”
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Coordination number changes during powder densification by German, Randall M.

“…The number of touching neighbors for each particle, known as the coordination number, increases with densification. Models for coordination number versus…”
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Sintering Trajectories: Description on How Density, Surface Area, and Grain Size Change by German, Randall M.

“…Sintering is a mainstay production step in forming metal, ceramic, polymer, and composite components from particles. Since the 1940s, the sintering process is…”
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Review: liquid phase sintering by German, Randall M., Suri, Pavan, Park, Seong Jin

“…Liquid phase sintering (LPS) is a process for forming high performance, multiple-phase components from powders. It involves sintering under conditions where…”
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Lower sintering temperature tungsten alloys for space research by German, Randall M.

“…In the early 1900s the sintering temperature for tungsten was 2800°C or higher. At that time direct electrical discharge (self-heating) was used to induce…”
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A review of processing techniques for graphene-reinforced metal matrix composites by Naseer, Abqaat, Ahmad, Faiz, Aslam, Muhammad, Guan, Beh Hoe, Harun, Wan Sharuzi Wan, Muhamad, Norhamidi, Raza, Muhammad Rafi, German, Randall M

“…In the quest to enhance reinforcement efficiency of graphene in metal matrices, various processing techniques have been devised over recent years. As the…”
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Factors affecting properties of Ti-6Al-4V alloy additive manufactured by metal fused filament fabrication by Singh, Paramjot, Balla, Vamsi K., Atre, Sundar V., German, Randall M., Kate, Kunal H.

“…This paper aims to break the current material-process-property tradeoffs in metal fused filament fabrication (MF3) to effectively fabricate Ti-6Al-4V alloy…”
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Gravity-Induced Distortion During Liquid-Phase Sintering by German, Randall M., Torresani, Elisa, Olevsky, Eugene A.

“…Sintering is used in the production of complex-shaped engineering components from compacted powders. For most applications, a predictable sintered size is a…”
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Experimental investigations on the synthesis of W–Cu nanocomposite through spark plasma sintering by Elsayed, Ayman, Li, Wei, El Kady, Omayma A., Daoush, Walid M., Olevsky, Eugene A., German, Randall M.

“…Elemental powders of nanosized tungsten and chemically deposited nanosized copper were used for preparing tungsten/copper composites, which are used as…”
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The Emergence of Quantitative Sintering Theory from 1945 to 1955 by German, Randall M.

“…Particles flow and pack under stress, allowing shaping of the particles into target engineering geometries. Subsequently, in a process termed sintering, the…”
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Densification mechanisms of spark plasma sintering: multi-step pressure dilatometry by Li, Wei, Olevsky, Eugene A., McKittrick, Joanna, Maximenko, Andrey L., German, Randall M.

“…The effects of electrical current and mechanical pressure on the densification of spherical copper powder during spark plasma sintering (SPS) are examined. A…”
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Metal matrix composites for fabricating tooling by Togwe, Thembani, Gökçe, Azim, Chen, Yanyu, German, Randall M., Atre, Sundar

“…The objective of this work is to investigate the fabrication, microstructures and, properties of metal matrix composites (MMCs) net-shaped using a four-step…”
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The Manufacturing of High Porosity Iron with an Ultra-Fine Microstructure via Free Pressureless Spark Plasma Sintering by Cui, Guodong, Wei, Xialu, Olevsky, Eugene A, German, Randall M, Chen, Junying

“…High porosity (>40 vol %) iron specimens with micro- and nanoscale isotropic pores were fabricated by carrying out free pressureless spark plasma sintering…”
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Effect of powders and binders on material properties and molding parameters in iron and stainless steel powder injection molding process by Ahn, Seokyoung, Park, Seong Jin, Lee, Shiwoo, Atre, Sundar V., German, Randall M.

“…It is essential to study and optimize multiple objective functions such as binder system design, feedstock, part geometry, mold design, and processing…”
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Sintering of bi-porous titanium dioxide scaffolds: Experimentation, modeling and simulation by Li, Wei, Porter, Michael M., Olevsky, Eugene A., German, Randall M., McKittrick, Joanna

“…Highly bimodal pore size distributions are found in ceramic scaffolds prepared by freeze casting (ice templating). The scaffolds, with preferred orientation in…”
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Grain size optimization for nanoscale tungsten carbide cobalt using master sintering curve model by Han, Jun Sae, Ha, Sangyul, Johnson, John L., German, Randall M., Park, Seong Jin

“…Sintering behavior of nanoscale WC-Co was investigated based on master sintering curve model. Densification and grain growth were mapped for grain size…”
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Preparation of high performance bulk Fe–N alloy by spark plasma sintering by Cui, Guodong, Wei, Xialu, Olevsky, Eugene A., German, Randall M., Chen, Junying

“…Bulk Fe–N alloys were fabricated using ultra-fine ε-Fe3N powder by spark plasma sintering (SPS) at 600°C, 650°C, 700°C, and 750°C. The sintering temperatures…”
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Investigation on sintering mechanism of nanoscale tungsten powder based on atomistic simulation by Moitra, Amitava, Kim, Sungho, Kim, Seong-Gon, Park, Seong Jin, German, Randall M., Horstemeyer, Mark F.

“…Atomistic simulations focusing on sintering of crystalline tungsten powders at the submicroscopic level are performed to shed light on the processing on the…”
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