J
John J. Lewandowski
Researcher at Case Western Reserve University
Publications - 275
Citations - 14240
John J. Lewandowski is an academic researcher from Case Western Reserve University. The author has contributed to research in topics: Fracture toughness & Toughness. The author has an hindex of 53, co-authored 267 publications receiving 12298 citations. Previous affiliations of John J. Lewandowski include Glenn Research Center & Los Alamos National Laboratory.
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Metal Additive Manufacturing: A Review of Mechanical Properties
John J. Lewandowski,Mohsen Seifi +1 more
TL;DR: A review of published data on the mechanical properties of additively manufactured metallic materials can be found in this paper, where the additive manufacturing techniques utilized to generate samples covered in this review include powder bed fusion (eBM, SLM, DMLS) and directed energy deposition (eBF3).
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Intrinsic plasticity or brittleness of metallic glasses
TL;DR: The intrinsic plasticity or brittleness of crystalline metals correlates with the ratio of the elastic shear modulus to the bulk modulus, and when the ratio exceeds a critical value, the metal is brittle as mentioned in this paper.
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Temperature rise at shear bands in metallic glasses
TL;DR: In this paper, a new experimental method based on a fusible coating was presented, which showed that the temperature rise, over a few nanoseconds, can be as high as a few thousand kelvin; nevertheless, the temperature rises did not seem to control the shear-band thickness.
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Fracture of brittle metallic glasses: brittleness or plasticity.
TL;DR: The results indicate that the fracture in brittle metallic glassy materials might also proceed through the local softening mechanism but at different length scales.
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Overview of Materials Qualification Needs for Metal Additive Manufacturing
TL;DR: In this article, the authors highlight some of the key aspects regarding materials qualification needs across the additive manufacturing (AM) spectrum, including various process-, microstructure-, and fracture-modeling activities in addition to integrating these with lifing activities targeting specific components.