The effect of Be addition on precipitation behavior and mechanical properties in Al-Cu-Li-Mg-(Ag)-Zr alloys

被引：0
|
作者：
Chung, DS [1 ]
Cho, SH [1 ]
Eun, IS [1 ]
Cho, HK [1 ]
机构：
[1] Changwon Ind Masters Coll, Dept Met, Changwon 641772, South Korea
来源：
LIGHT WEIGHT ALLOYS FOR AEROSPACE APPLICATIONS IV | 1996年
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D O I：
暂无
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The effect of Be addition on mechanical properties and precipitation behaviors was studied by hardness and strength measurement and TEM analysis in Al-Cu-Li-Mg- (Ag)-Zr alloy. Be additions result in acceleration of ageing response, increasing elongation without reduction of yield strength. Be free A alloy shows G.P, zone which was produced in Al-Cu alloy system in early stage of ageing. theta' phase and T-1 phase coexisted in peak and over-ageing stage. Be added B and C alloy have already formed T-1 and theta' phase in under-ageing stage, and were decreased the density of theta' phase in peak and over-ageing stage compared with that of Be free A alloy, but T1 phase was distributed finely and homogeneously. New precipitates having square shape were found, which hare not been reported yet in this alloy system.
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页码：95 / 104
页数：10
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