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Your search keyword '"Yoichi Takizawa"' showing total 9 results
Start Over Author "Yoichi Takizawa" Journal materials transactions
9 results on '"Yoichi Takizawa"'

4. Enhancement of Activation and Hydrogen Storage Kinetics of TiFe(Mn) Using High-Pressure Sliding (HPS) Process.

Author

Zenji Horita, Yongpeng Tang, Motoaki Matsuo, Kaveh Edalati, Manabu Yumoto, and Yoichi Takizawa

Subjects
HYDROGEN storage, MATERIAL plasticity, STAINLESS steel, HYDROGENATION kinetics, INGOTS
Abstract

A titaniumiron intermetallic with minor addition of manganese (TiFe0.7Mn0.3) was processed by severe plastic deformation through highpressure sliding (HPS). A rectangular strip sample was embedded in stainless steel and strained under a pressure of 4 GPa at room temperature. The hydrogen storage kinetics and activation of the HPS-processed sample were significantly enhanced in comparison with the as-received ingot without the HPS processing. [ABSTRACT FROM AUTHOR]

Published
2023
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5. Severe Plastic Deformation under High Pressure: Upsizing Sample Dimensions

Author

Yoichi Takizawa, Takahiro Masuda, Yongpeng Tang, and Zenji Horita

Subjects
Materials science, high-pressure sliding, Mechanical Engineering, superplasticity, Metals and Alloys, Superplasticity, Condensed Matter Physics, Sample (graphics), high-pressure torsion, Mechanics of Materials, High pressure, Materials Chemistry, grain refinement, General Materials Science, Composite material, Severe plastic deformation, continuous processing
Abstract

It is well known that severe plastic deformation (SPD) produces ultrafine-grained structures in bulk metallic materials. The SPD process becomes more versatile when it is performed under high pressure as high-pressure torsion (HPT) and high-pressure sliding (HPS). Not only the grain size is more refined but also the process is applicable to hard-to-deform materials such as intermetallics, semiconductors and ceramics, leading to enhancement of functional properties as well as structural properties. The major drawback is that the sample size is small so that the applicability is limited to a laboratory scale and it is an important subject to increase the sample dimensions. This paper presents an overview describing efforts devoted thus far to deal with this upscaling issue.

Published
2020
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8. Combination of High-Pressure Torsion with Incremental Feeding for Upsizing Sample

Author

Takuya Komatsu, Yoshiharu Otagiri, Takahiro Masuda, Etsuko Shigeno, Kosei Sumikawa, Manabu Yumoto, Zenji Horita, and Yoichi Takizawa

Subjects
010302 applied physics, Materials science, Mechanical Engineering, Torsion (mechanics), Superplasticity, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Superalloy, Mechanics of Materials, High pressure, 0103 physical sciences, General Materials Science, Composite material, Severe plastic deformation, 0210 nano-technology
Published
2018
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9. Extra Strengthening and Superplasticity of Ultrafine-Grained A2024 Alloy Produced by High-Pressure Sliding

Author

Zenji Horita, Takahiro Masuda, Manabu Yumoto, Yoshiharu Otagiri, and Yoichi Takizawa

Subjects
010302 applied physics, Materials science, Mechanical Engineering, Metallurgy, Alloy, Superplasticity, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Mechanics of Materials, High pressure, 0103 physical sciences, engineering, General Materials Science, Severe plastic deformation, 0210 nano-technology
Published
2017
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