Softening and microstructural coarsening without twin formation in FCC metals with low stacking fault energy after processing by high-pressure torsion

Hirotaka Matsunaga, Zenji Horita

研究成果: Contribution to journalArticle査読

29 被引用数 (Scopus)

抄録

Gold (Au), silver (Ag) and copper (Cu) were severely deformed through the process of high pressure torsion (HPT). The grain sizes were reduced to the submicrometer range and the hardness increased significantly by the HPT process. However, after holding at room temperature, Au and Ag exhibited grain growth and thus softening without heating. The softening and microstrcutural coarsening occurred rather quickly in Ag and moderately in Au but nothing changed in Cu even after keeping for prolonged time. No twins were formed along with the grain growth in the HPT-processed Au and Ag. High density lattice defects and enhanced diffusivity in the metals are responsible for such an unusual softening behavior.

本文言語英語
ページ(範囲)1633-1637
ページ数5
ジャーナルMaterials Transactions
50
7
DOI
出版ステータス出版済み - 7 2009

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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