Use of ring sample for high-pressure torsion and microstructural evolution with equivalent strain

Yuki Ito, Yosuke Harai, Tadayoshi Fujioka, Kaveh Edalati, Zenji Horita

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

10 被引用数 (Scopus)

抄録

This study introduces a process of high-pressure torsion (HPT) using ring samples and compares with the results of conventional disk HPT. Both types of HPT were conducted at room temperature on pure Al and pure Cu. The microhardness was measured along the diameters of the disks and rings. Microstructures were examined using transmission electron microscopy. When hardness values were plotted against equivalent strain, all data points fell on a single line for each material. There was a hardness maximum for pure Al but no such a maximum was present in pure Cu. In pure Al, many dislocations were visible within grains up to the equivalent strain corresponding to the hardness maximum but beyond this strain, grains with low dislocation density appear. All materials exhibited steady state where the hardness remains constant with respect to imposed equivalent strain. This study concludes that use of ring samples is effective as an alternative to the disk samples.

本文言語英語
ホスト出版物のタイトルMaterials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
編集者Yuri Estrin, Yuri Estrin, Hans Jurgen Maier
出版社Trans Tech Publications Ltd
ページ191-196
ページ数6
ISBN(電子版)978-0-87849-360-9
DOI
出版ステータス出版済み - 2008
イベント4th International Conference on Nanomaterials by Severe Plastic Deformation - Goslar, ドイツ
継続期間: 8 18 20088 22 2008

出版物シリーズ

名前Materials Science Forum
584-586 PART 1
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

その他

その他4th International Conference on Nanomaterials by Severe Plastic Deformation
国/地域ドイツ
CityGoslar
Period8/18/088/22/08

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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