An application of the ultra-microhardness technique to high-energy ion-irradiated copper for evaluating stress-strain properties

K. Yasuda, K. Shinohara, C. Kinoshita, M. Yamada

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

We proposed a method for evaluating stress-strain properties of fcc metals solely by ultra-microhardness (UMH) technique in the previous paper. This paper deals with its application to pure copper irradiated with 100 MeV I7+ ions. UMH measurements at 0.1 g and TEM observations are carried out on specimens prepared in cross section, and the value of the strain-hardening exponent (n) and the 0.2% yield stress (σ0.2) are evaluated as a function of the penetration depth of ions. The value of σ0.2 is compared with that obtained by the conventional method without taking work-hardening into consideration. The conventional method overestimates σ0.2 at the depth where the value of n is evaluated not to be zero, demonstrating the importance of our method for evaluating σ0.2 of metals whose values for n vary with irradiation. The increment of σ0.2 obtained by our method is analyzed in terms of the density of defect clusters, and it closely follows the expected relation for irradiation-induced hardening caused by defect clusters.

本文言語英語
ページ(範囲)1703-1707
ページ数5
ジャーナルJournal of Nuclear Materials
212-215
PART B
DOI
出版ステータス出版済み - 9 1994

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

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