H
Hiroyuki Kokawa
Researcher at Shanghai Jiao Tong University
Publications - 280
Citations - 11770
Hiroyuki Kokawa is an academic researcher from Shanghai Jiao Tong University. The author has contributed to research in topics: Welding & Friction stir welding. The author has an hindex of 51, co-authored 271 publications receiving 10329 citations. Previous affiliations of Hiroyuki Kokawa include Tohoku University & Toho University.
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Microstructural evolution of 6063 aluminum during friction-stir welding
TL;DR: The microstructural distribution associated with a hardness profile in a friction-stir-welded, age-hardenable 6063 aluminum alloy has been characterized by transmission electron microscopy and orientation imaging microscopy as mentioned in this paper.
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Optimization of grain boundary character distribution for intergranular corrosion resistant 304 stainless steel by twin-induced grain boundary engineering
TL;DR: In this paper, the effects of process parameters, pre-strain, annealing temperature, etc. on grain boundary character distribution and intergranular corrosion in thermomechanical treatment were examined during grain boundary engineering of type 304 austenitic stainless steel.
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Parameters controlling microstructure and hardness during friction-stir welding of precipitation-hardenable aluminum alloy 6063
TL;DR: In this paper, the aluminum alloys 6063-T5 and T4 were friction-stir welded at different tool rotation speeds (R), and then distributions of the microstructure and hardness were examined in these welds.
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Constitutional liquation during dissimilar friction stir welding of Al and Mg alloys
TL;DR: A dissimilar friction stir weld of Al alloy 1050 and Mg alloy AZ31 was produced in this paper, which had a large volume of intermetallic compound Al 12 Mg 17 and significantly higher hardness in the weld center.
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Effect of micro-texture on fracture location in friction stir weld of Mg alloy AZ61 during tensile test
TL;DR: In this paper, the tensile properties of the weld of Mg alloy AZ61 were strongly influenced by crystallographic orientation distribution as well as by grain size and dislocation density.