Search Results - "Ameyama, Kei"

Improvement of mechanical properties in SUS304L steel through the control of bimodal microstructure characteristics by ZHE ZHANG, SANJAY KUMAR VAJPAI, ORLOV, Dmitry, AMEYAMA, Kei

“…The present work deals with achieving improvement in the mechanical properties of SUS304L stainless steel through the application of a unique microstructure…”
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Harmonic-structured copper: performance and proof of fabrication concept based on severe plastic deformation of powders by Sawangrat, Choncharoen, Kato, Shota, Orlov, Dmitry, Ameyama, Kei

“…Pure copper (Cu) having bimodal ‘harmonic structure’ (HS) was fabricated by a technique based on severe plastic deformation of powders, which involved tailored…”
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Design and development of Ti–Zr–Hf–Nb–Ta–Mo high-entropy alloys for metallic biomaterials by Iijima, Yuuka, Nagase, Takeshi, Matsugaki, Aira, Wang, Pan, Ameyama, Kei, Nakano, Takayoshi

“…Applying empirical alloy parameters (including Mo equivalent), the predicted ground state diagram, and thermodynamic calculations, noble nonequiatomic…”
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Enhanced corrosion resistance of CoCrFeMnNi high entropy alloy using heterogeneous structure design by Wang, Jiapan, Zhang, Zhe, Dai, Hailong, Fujiwara, Hiroshi, Chen, Xu, Ameyama, Kei

“…High entropy alloys (HEAs) with heterogeneous grain structure exhibit an unprecedented combination of high strength and high ductility. Therefore, it is…”
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Enhanced synergy of strength-ductility and low-cycle fatigue resistance of high-entropy alloy through harmonic structure design by Zhang, Zhe, Zhai, Xinyu, Chen, Gang, Chen, Xu, Ameyama, Kei

“…Compared with homogeneous structured materials, heterogeneous structured materials exhibit unprecedented performances. In the present work, a series of…”
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Effects of Microstructure on Mechanical Properties of Harmonic Structure Designed Pure Ni by Nagata, Masaya, Horikawa, Naoki, Kawabata, Mie, Ameyama, Kei

“…This study aimed at investigating the influence of microstructure on mechanical properties of Harmonic Structured (HS) pure-Ni compacts. The harmonic structure…”
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Simultaneously enhanced strength and strain hardening capacity in FeMnCoCr high-entropy alloy via harmonic structure design by Li, Guodong, Liu, Maowen, Lyu, Shaoyuan, Nakatani, Masashi, Zheng, Ruixiao, Ma, Chaoli, Li, Qiushi, Ameyama, Kei

“…Harmonic structure (HS), consisting of coarse-grained (CG) areas uniformly embedded in three dimensional continuously connected ultrafine-grained (UFG) areas,…”
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Microstructure and properties of beta Ti–Nb alloy prepared by powder metallurgy route using titanium hydride powder by Sharma, Bhupendra, Vajpai, Sanjay Kumar, Ameyama, Kei

“…In the present work, Ti–40 mass%Nb alloys were successfully fabricated by a powder metallurgy route consisting of mechanical alloying (MA) of TiH2–Nb powder…”
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Towards strength-ductility synergy through hierarchical microstructure design in an austenitic stainless steel by Zheng, Ruixiao, Liu, Maowen, Zhang, Zhe, Ameyama, Kei, Ma, Chaoli

“…An austenitic stainless steel with precisely controlled hierarchical microstructure consisting of statically recrystallized grains (SRGs), nanograins (NGs) and…”
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Heterogeneous evolution of lattice defects leading to high strength and high ductility in harmonic structure materials through atomic and dislocation simulations by Shimokawa, Tomotsugu, Hasegawa, Tatsuya, Kiyota, Keito, Niiyama, Tomoaki, Ameyama, Kei

“…[Display omitted] Core–shell harmonic structure materials, in which coarse grains (core regions) are surrounded by many fine grains (shell region), have…”
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Enhanced ductility in harmonic structure designed SUS316L produced by high energy ball milling and hot isostatic sintering by Zheng, Ruixiao, Zhang, Zhe, Nakatani, Masashi, Ota, Mie, Chen, Xu, Ma, Chaoli, Ameyama, Kei

“…The objective of the present study is to optimize the mechanical properties of commercial SUS316L stainless steel through harmonic structure design. The…”
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Efficient design of harmonic structure using an integrated hetero-deformation induced hardening model and machine learning algorithm by Park, Hyung Keun, Kim, Yongju, Jung, Jaimyun, Lee, Hak Hyeon, Park, Jeong Min, Ameyama, Kei, Kim, Hyoung Seop

“…Harmonic structured material (HSM) of coarse-grained core and fine-grained shell microstructure in SS304L was designed using a three-dimensional numerical…”
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Extra-strengthening in a harmonic structure designed pure titanium due to preferential recrystallization phenomenon through thermomechanical treatment by Sharma, Bhupendra, Miyakoshi, Motoki, Vajpai, Sanjay Kumar, Dirras, Guy, Ameyama, Kei

“…The effect of thermomechanical processing (TMP), consisting of cold rolling followed by annealing, on the microstructure and mechanical properties of Harmonic…”
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Effect of harmonic structure on the electrochemical behavior of high entropy Cantor alloy in NaCl solution by Banik, Debdipta, Bhushan, B., Mukherjee, S., Bhagyaraj, J., Fujiwara, Hiroshi, Ameyama, Kei, Mondal, K.

“…The present work discusses the effect of harmonic structure on the corrosion behavior of high entropy Cantor alloy (Fe20Cr20Mn20Ni20Co20) in freely aerated…”
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Preparation of strong and ductile pure titanium via two-step rapid sintering of TiH2 powder by Sharma, Bhupendra, Vajpai, Sanjay Kumar, Ameyama, Kei

“…The present work demonstrates the feasibility of preparing bulk-Ti, with high strength and good ductility, via spark plasma sintering of TiH2 powders. The…”
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Stress partitioning in harmonic structure materials at the early stages of tensile loading studied in situ by synchrotron X-ray diffraction by Sjögren-Levin, Elis, Pantleon, Wolfgang, Ahadi, Aylin, Hegedüs, Zoltan, Lienert, Ulrich, Tsuji, Nobuhiro, Ameyama, Kei, Orlov, Dmytro

“…In situ X-ray diffraction was employed to gain insight into the tensile deformation behavior of harmonic structure (HS) nickel. HS consists of a continuous…”
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Effect of high volume fraction of B4C particles on the microstructure and mechanical properties of aluminum alloy based composites by Zheng, Ruixiao, Hao, Xiaoning, Yuan, Yanbo, Wang, Zhiwei, Ameyama, Kei, Ma, Chaoli

“…•Al-2024/B4C composites have been prepared by powder metallurgy method.•Mechanical milling resulted in significant grain refinement of the Al matrix.•The…”
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Further optimization of strength and ductility in a harmonic structure designed pure copper via thermomechanical processing by Li, Guodong, Lyu, Shaoyuan, Zheng, Ruixiao, Kawabata, Mie, Ma, Chaoli, Li, Qiushi, Ameyama, Kei

“…In this study, thermomechanical processing (TMP) including cold rolling and subsequent annealing was applied to a novel tri-dimensional core/shell structured…”
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Influence of microstructural features on the yield strength of Ti–6Al–4V: a numerical study by using the crystal plasticity finite element method by Wang, Xiang, Li, Jia, Ameyama, Kei, Dirras, Guy

“…In this paper, a numerical study was presented on the influence of microstructural features on the yield strength of bimodal α–β Ti–6Al–4V. Tensile tests and…”
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Fabrication of Copper of Harmonic Structure: Mechanical Property-Based Optimization of the Milling Parameters and Fracture Mechanism by Sojithamporn, Phanumas, Sawangrat, Choncharoen, Leksakul, Komgrit, Sharma, Bhupendra, Ameyama, Kei

“…A severe plastic deformation process for the achievement of favorable mechanical properties for metallic powder is mechanical milling. However, to obtain the…”
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