Age hardening and thermal stability of Al-Cu alloy processed by high-pressure torsion

Intan Fadhlina Mohamed, Yosuke Yonenaga, Seungwon Lee, Kaveh Edalati, Zenji Horita

研究成果: Contribution to journalArticle査読

62 被引用数 (Scopus)

抄録

An age-hardenable Al-4. wt% Cu alloy is severely deformed using high-pressure torsion (HPT) to refine the microstructure to an average gain size of ~210. nm. High saturation hardness of 205. Hv and high tensile strength of 820. MPa are achieved after the HPT processing. It is shown that the strength of the HPT-processed alloy is further improved by natural aging at room temperature or by artificial aging at 353. K. A peak hardness followed by softening appears within a few days after natural aging and within a few minutes after aging at 353. K, suggesting the low thermal stability of the alloy. Quantitative evaluation of different strengthening mechanisms shows that the grain boundary hardening through the Hall-Petch relationship and the precipitation hardening through the Orowan relationship are dominant strengthening mechanisms.

本文言語英語
ページ(範囲)111-118
ページ数8
ジャーナルMaterials Science and Engineering A
627
DOI
出版ステータス出版済み - 3 1 2015

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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