Role of vacancy-solute complex in the initial rapid age hardening in an Al-Cu-Mg alloy

Y. Nagai, M. Murayama, Z. Tang, T. Nonaka, K. Hono, M. Hasegawa

研究成果: Article査読

132 被引用数 (Scopus)

抄録

We have investigated the origin of the initial rapid hardening of an Al-1.3 at.% Mg-1.7 at.% Cu alloy by coincidence Doppler broadening of positron annihilation radiation and positron lifetime spectroscopy. Quenched-in vacancies are bound to Mg atoms rather than Cu atoms initially and the vacancy-Mg complexes easily migrate to vacancy sinks at 150°C. Vacancy-Mg-Cu complexes form during the initial 1 min aging at vacancy sinks, meanwhile vacancy density decreases rapidly. These results support that the dislocation-solute interaction is the origin of the initial rapid hardening.

本文言語English
ページ(範囲)913-920
ページ数8
ジャーナルActa Materialia
49
5
DOI
出版ステータスPublished - 2001 3 14

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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