Effect of heterogeneous precipitation on age-hardening of Al{sub 2}O{sub 3} particle dispersion Al-4mass% Cu composite produced by mechanical alloying
The acceleration of aging kinetics has been frequently observed in aluminum matrix composites produced by ingot or powder metallurgy. Recently, in the mechanically alloyed (MA) Al-4mass%Cu/Al{sub 2}O{sub 3} composites, the authors have found that the age-hardening response significantly decreases, and that considerable stable {theta} phases are formed at a very short aging time. The purposes of this study are to investigate the local precipitation behaviors, and attempt to clarify the dominant microstructural factors of the decrease in the age-harden ability and the acceleration of the age-hardening kinetics in the Al{sub 2}O{sub 3} particle dispersion Al-4mass%Cu composites produced by mechanical alloying. In order to build a basis for comparison, the age-hardening behaviors of the unreinforced matrix alloy (IM alloy), which is produced by ingot metallurgy technique, are also investigated.
- Research Organization:
- Hiroshima Univ. (JP)
- OSTI ID:
- 20050503
- Journal Information:
- Scripta Materialia, Vol. 42, Issue 8; Other Information: PBD: 14 Apr 2000; ISSN 1359-6462
- Country of Publication:
- United States
- Language:
- English
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