Search Results - "Yamanaka, Kenta"

Significant lattice-distortion effect on compressive deformation in Mo-added CoCrFeNi-based high-entropy alloys by Li, Jiaxiang, Yamanaka, Kenta, Chiba, Akihiko

“…Large lattice distortion is an essential feature of high-entropy alloys (HEAs). Herein, the deformation behaviors of three types of as-cast CoCrFeNi-based…”
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Relationship between the microstructure and mechanical properties of an equiatomic AlCoCrFeNi high-entropy alloy fabricated by selective electron beam melting by Shiratori, Hiroshi, Fujieda, Tadashi, Yamanaka, Kenta, Koizumi, Yuichiro, Kuwabara, Kosuke, Kato, Takahiko, Chiba, Akihiko

“…Because of their superior properties, high-entropy alloys (HEAs) are considered promising novel structural materials that can substitute conventional alloys…”
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Smoke Suppression in Electron Beam Melting of Inconel 718 Alloy Powder Based on Insulator–Metal Transition of Surface Oxide Film by Mechanical Stimulation by Chiba, Akihiko, Daino, Yohei, Aoyagi, Kenta, Yamanaka, Kenta

“…In powder bed fusion–electron beam melting, the alloy powder can scatter under electron beam irradiation. When this phenomenon—known as smoking—occurs, it…”
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Hot deformation characteristics and dynamic recrystallization mechanisms of a Co–Ni-based superalloy by Ouyang, Lingxiao, Luo, Rui, Gui, Yunwei, Cao, Yun, Chen, Leli, Cui, Yujie, Bian, Huakang, Aoyagi, Kenta, Yamanaka, Kenta, Chiba, Akihiko

“…The hot deformation behavior of a Co–Ni-based superalloy was systematically investigated using thermal compression tests. Stress–strain curves showed a typical…”
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Stacking-fault strengthening of biomedical Co–Cr–Mo alloy via multipass thermomechanical processing by Yamanaka, Kenta, Mori, Manami, Sato, Shigeo, Chiba, Akihiko

“…The strengthening of metallic biomaterials, such as Co–Cr–Mo and titanium alloys, is of crucial importance to the improvement of the durability of orthopedic…”
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First demonstration of promising selective electron beam melting method for utilizing high-entropy alloys as engineering materials by Fujieda, Tadashi, Shiratori, Hiroshi, Kuwabara, Kosuke, Kato, Takahiko, Yamanaka, Kenta, Koizumi, Yuichiro, Chiba, Akihiko

“…High-entropy alloys (HEAs) are equiatomic, multi-element systems that contain five or more principal elements and have unique and excellent properties…”
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Effects of post-processing on cyclic fatigue response of a titanium alloy additively manufactured by electron beam melting by Shui, Xiaoli, Yamanaka, Kenta, Mori, Manami, Nagata, Yoshihiko, Kurita, Kenya, Chiba, Akihiko

“…To establish the benefits of electron beam melting (EBM) for the fabrication of Ti–6Al–4V alloy components, it is necessary to properly understand the fatigue…”
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Synergetic strengthening in HfMoNbTaTi refractory high-entropy alloy via disordered nanoscale phase and semicoherent refractory particle by Yang, Cheng, Bian, Huakang, Aoyagi, Kenta, Hayasaka, Yuichiro, Yamanaka, Kenta, Chiba, Akihiko

“…[Display omitted] •A parameter of segregation tendency, δTm, was proposed for designing HEAs.•A disordered high-entropy nanoscale phase with homogeneous…”
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Corrosion mechanism of an equimolar AlCoCrFeNi high-entropy alloy additively manufactured by electron beam melting by Yamanaka, Kenta, Shiratori, Hiroshi, Mori, Manami, Omura, Kazuyo, Fujieda, Tadashi, Kuwabara, Kosuke, Chiba, Akihiko

“…High-entropy alloys (HEAs) have emerged as a class of structural alloys with various attractive properties, and their application in additive manufacturing,…”
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Role of operating and environmental conditions in determining molten pool dynamics during electron beam melting and selective laser melting by Zhao, Yufan, Aoyagi, Kenta, Yamanaka, Kenta, Chiba, Akihiko

“…•Experiments and simulations were performed to investigate molten pool dynamics of EBM and SLM.•Owing to the slight vapor recoil pressure under vacuum, EBM…”
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A survey on basic influencing factors of solidified grain morphology during electron beam melting by Zhao, Yufan, Aoyagi, Kenta, Yamanaka, Kenta, Chiba, Akihiko

“…[Display omitted] •Steady-state solidification criterion based on temperature gradient (G) and solidification rate (R) was not as accurate as expected.•Melt…”
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Adhesion mechanism of cold-sprayed Sn coatings on carbon fiber reinforced plastics by Sun, Jiayu, Yamanaka, Kenta, Zhou, Shaoyun, Saito, Hiroki, Ichikawa, Yuji, Ogawa, Kazuhiro, Chiba, Akihiko

“…[Display omitted] •Adhesion mechanism of cold-sprayed Sn coatings on CFRPs was investigated.•Specimens were prepared at gas temperatures of 473 and…”
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Nanoarchitectured Co–Cr–Mo orthopedic implant alloys: Nitrogen-enhanced nanostructural evolution and its effect on phase stability by Yamanaka, Kenta, Mori, Manami, Chiba, Akihiko

“…Our previous studies indicate that nitrogen addition suppresses the athermal γ (face-centered cubic, fcc)→ε (hexagonal close-packed, hcp) martensitic…”
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Development of new Co–Cr–W-based biomedical alloys: Effects of microalloying and thermomechanical processing on microstructures and mechanical properties by Yamanaka, Kenta, Mori, Manami, Kuramoto, Koji, Chiba, Akihiko

“…•A strategy to design Co–Cr–W–Si–C alloys for dental restorations is proposed.•This approach combines microalloying with thermomechanical…”
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Molten pool behavior and effect of fluid flow on solidification conditions in selective electron beam melting (SEBM) of a biomedical Co-Cr-Mo alloy by Zhao, Yufan, Koizumi, Yuichiro, Aoyagi, Kenta, Wei, Daixiu, Yamanaka, Kenta, Chiba, Akihiko

“…Selective electron beam melting (SEBM) is a type of additive manufacturing (AM) that involves multiple physical processes. Because of its unique process…”
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Effects of plasma rotating electrode process parameters on the particle size distribution and microstructure of Ti-6Al-4 V alloy powder by Cui, Yujie, Zhao, Yufan, Numata, Haruko, Bian, Huakang, Wako, Kimio, Yamanaka, Kenta, Aoyagi, Kenta, Zhang, Chen, Chiba, Akihiko

“…The starting powder quality significantly influences the process window optimization and properties of parts fabricated by additive manufacturing. In this…”
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Controlling factors determining flowability of powders for additive manufacturing: A combined experimental and simulation study by Zhao, Yufan, Cui, Yujie, Hasebe, Yusaku, Bian, Huakang, Yamanaka, Kenta, Aoyagi, Kenta, Hagisawa, Takehito, Chiba, Akihiko

“…Powder flowability affects dynamic powder behavior during additive manufacturing and varies depending on particle size distribution, particle morphology, and…”
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Effect of Al content and cold rolling on the microstructure and mechanical properties of Al5Cr12Fe35Mn28Ni20 high-entropy alloy by Elkatatny, Sally, Gepreel, Mohamed A.H., Hamada, Atef, Nakamura, Koichi, Yamanaka, Kenta, Chiba, Akihiko

“…In the present study, low-cost high-entropy Al(5,10)Cr12Fe35Mn (28,23)Ni20 alloys containing 5 and 10 at. % Al were designed based on the thermodynamic…”
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Effects of process parameters and cooling gas on powder formation during the plasma rotating electrode process by Cui, Yujie, Zhao, Yufan, Numata, Haruko, Yamanaka, Kenta, Bian, Huakang, Aoyagi, Kenta, Chiba, Akihiko

“…The plasma rotating electrode process (PREP) is rapidly becoming an important powder fabrication method in additive manufacturing. However, the low production…”
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Non-equilibrium solidification behavior associated with powder characteristics during electron beam additive manufacturing by Zhao, Yufan, Bian, Huakang, Wang, Hao, Kenta, Aoyagi, Kenta, Yamanaka, Chiba, Akihiko

“…[Display omitted] •The mechanism that powder features influence non-equilibrium solidification was revealed.•The formation of σ phase and shrinkage void in…”
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