S
S. Collins
Researcher at Arcam
Publications - 5
Citations - 1439
S. Collins is an academic researcher from Arcam. The author has contributed to research in topics: Grain boundary & Microstructure. The author has an hindex of 4, co-authored 5 publications receiving 1162 citations.
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Journal ArticleDOI
Microstructures and mechanical behavior of Inconel 718 fabricated by selective laser melting
Krista Amato,Sara M. Gaytan,Lawrence E Murr,E. Martinez,P. W. Shindo,Jennifer Hernandez,S. Collins,Francisco Medina +7 more
TL;DR: In this paper, the Inconel 718 cylinders were fabricated by selective laser melting in either argon or nitrogen gas from a pre-alloyed powder, and they exhibited columnar grains and arrays of oblate ellipsoidal precipitates oriented in a strong [2.0.0] texture determined by combined optical metallography, transmission electron microscopy, and X-ray diffraction analysis.
Journal ArticleDOI
Characterization of titanium aluminide alloy components fabricated by additive manufacturing using electron beam melting
Lawrence E Murr,Sara M. Gaytan,A. Ceylan,E. Martinez,J.L. Martinez,D.H. Hernandez,B.I. Machado,D. A. Ramirez,Francisco Medina,S. Collins,Ryan B. Wicker +10 more
TL;DR: The residual microindentation (Vickers) hardness (HV) averaged 4.1 GPa, corresponding to a nominal yield strength of ∼1.4 GPa (∼HV/3), and a specific yield strength (specific yield strength) of 0.37 GPa cm3 g−1 (for a density of 3.76 g cm−3), in contrast to 0.27 GPa kg−1 for EBM-fabricated Ti−6Al−4V components.
Journal ArticleDOI
Comparison of Microstructures and Mechanical Properties for Solid and Mesh Cobalt-Base Alloy Prototypes Fabricated by Electron Beam Melting
Sara M. Gaytan,Lawrence E Murr,E. Martinez,J.L. Martinez,B.I. Machado,D. A. Ramirez,Francisco Medina,S. Collins,Ryan B. Wicker +8 more
TL;DR: In this article, the microstructures and mechanical behavior of simple, as-fabricated, solid geometries (with a density of 8.4 g/cm3), including femoral (knee) components and reticulated mesh components, all produced by additive manufacturing (AM) using electron beam melting (EBM) of Co-26Cr-6Mo-0.2C powder are examined and compared.