WORK-HARDENING AND RECOVERY RATES IN PURE ALUMINUM SINGLE CRYSTALS DURING HIGH-TEMPERATURE DEFORMATION.

Hideharu Nakashima, Nobuhiko Kawamura, Hiroaki Kurishita, Hideo Yoshinaga

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

In order to clarify the contribution of grain boundary effect on the work-hardening rate without recovery effect, h, and the recovery rate without work-hardening effect, r, these two parameters in pure aluminum single crystals have been measured and compared with those in aluminum polycrystals reported so far. The measurement has been carried out by applying the strain-rate change technique to the steady-state tensile deformation at temperatures from 523 K to 673 K and at shear strain rates from 1. 2 multiplied by 10** minus **5 s** minus **1 to 4. 6 multiplied by 10** minus **1. It is found that h is approximately proportional to the inverse of stress and depends strongly on temperature. The stress exponent of r is about 3. The activation energy of r is about 2/3 of the activation energy of lattice self-diffusion in Al. These stress and temperature dependences of h and r are almost the same as those of the polycrystals. Therefore, it is concluded that the contribution of grain boundary effect to h and r is not large.

本文言語英語
ページ(範囲)441-448
ページ数8
ジャーナルNippon Kinzoku Gakkai-si
50
5
DOI
出版ステータス出版済み - 1986

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学

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