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Kei Ameyama
Researcher at Ritsumeikan University
Publications - 283
Citations - 5472
Kei Ameyama is an academic researcher from Ritsumeikan University. The author has contributed to research in topics: Microstructure & Spark plasma sintering. The author has an hindex of 31, co-authored 257 publications receiving 3878 citations. Previous affiliations of Kei Ameyama include University of Nova Gorica.
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Heterostructured materials: superior properties from hetero-zone interaction
Yuntian Zhu,Kei Ameyama,Peter M. Anderson,Irene J. Beyerlein,Huajian Gao,Hyoung Seop Kim,Enrique J. Lavernia,Suveen N. Mathaudhu,Haël Mughrabi,Robert O. Ritchie,Nobuhiro Tsuji,Xiangyi Zhang,Xiaolei Wu +12 more
Abstract: Heterostructured materials are an emerging class of materials with superior performances that are unattainable by their conventional homogeneous counterparts. They consist of heterogeneous zones wi...
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Low temperature superplasticity of AZ91 magnesium alloy with non-equilibrium grain boundaries
TL;DR: In this paper, the superplastic behavior of a fine-grained AZ91 alloy, processed by equal channel angular extrusion, has been investigated in a low temperature range of 423 −523 K. The experimental results showed a stress exponent of 2 and the activation energy for super-plastic flow was in agreement with that for grain boundary diffusion of magnesium.
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Improvement of mechanical properties in SUS304L steel through the control of bimodal microstructure characteristics
TL;DR: In this article, the harmonic structure of SUS304L stainless steels has been used to achieve a combination of high strength, large uniform elongation, and large total elongation to failure.
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Enhanced mechanical properties of Al5083 alloy with graphene nanoplates prepared by ball milling and hot extrusion
TL;DR: In this article, the microstructures of the ball-milled powders and GNP/Al5083 composites were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and transmission electron microscope.
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Additional hardening in harmonic structured materials by strain partitioning and back stress
TL;DR: In this article, the deformation behavior of a harmonic structured material (HSM), core-shell 304L stainless steel, was investigated using micro-digital image correlation (micro-DIC).