Atom probe studies on the early stages of precipitation in Al-Mg-Si alloys

M. Murayama, K. Hono, M. Saga, M. Kikuchi

研究成果: Contribution to journalArticle査読

196 被引用数 (Scopus)

抄録

Pre-precipitation stages of Al-0.70Mg-0.33Si and Al-0.65Mg-0.70Si (at.%) alloys have been investigated by atom probe field ion microscopy (APFIM) and high resolution transmission electron microscopy (HREM). Atom probe results show that clusters of Mg atoms are present in the as-quenched state. After a prolonged aging at room temperature, clusters of Mg, Si and their co-clusters are detected, although no contrasts suggesting the presence of precipitates are observed in HREM images. In the specimens aged at 175°C for 30 min, small equiaxed Mg-Si precipitates are observed by TEM. APFIM results show that the ratio of Mg to Si atoms in the precipitates is close to 1, rather than 2, which is expected from the equilibrium concentration of Mg2Si.

本文言語英語
ページ(範囲)127-132
ページ数6
ジャーナルMaterials Science and Engineering A
250
1
DOI
出版ステータス出版済み - 7 15 1998
外部発表はい

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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