Precipitation of Al3Sc in Al-0.23 mass%Sc alloy

被引：20
|
作者：
Nakayama, M [1 ]
Furuta, A [1 ]
Miura, Y [1 ]
机构：
[1] KYUSHU UNIV,DEPT MAT SCI & ENGN,FUKUOKA 812,JAPAN
来源：
MATERIALS TRANSACTIONS JIM | 1997年 / 38卷 / 10期
关键词：
aluminum-scandium alloy; Al3Sc; age-hardening; Ostwald ripening; particle size distribution;
D O I：
10.2320/matertrans1989.38.852
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Age hardening and precipitation processes in an Al-0.23 mass%Sc alloy were studied by the hardness test, electrical resistivity measurement and TEM observation. The stable and coherent Al3Sc phase of the L1(2) ordered structure precipitates directly from a supersaturated solid solution without forming any metastable phases. A plot of the cube of the particle radius against aging time follows a straight line, suggesting that the coarsening obeys the LSW theory of the diffusion controlled ripening process. The apparent activation energy for the precipitation of the Al3Sc phase determined by electrical resistivity change is 80 kJ/mol.
引用
收藏
页码：852 / 857
页数：6
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