Age-hardening behavior of heat-treatable Al-Si-base cast alloy

被引：0
作者：
Li, RX [1 ]
Li, RD
He, LZ
Li, CX
Hu, ZQ
机构：
[1] Shenyang Polytech Univ, Shenyang 110023, Peoples R China
[2] Shenyang Inst Aeronaut Engn, Shenyang 110034, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2004年 / 33卷 / 02期
关键词：
cast aluminum alloy; age hardening; microstructure morphology; DSC curve; tow-peaks aging;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The age-hardening characteristics of heat-treatable Al-Si-base cast alloys have been investigated in this paper. When aging treatment exceeds a fixed temperature, two and one hardness peaks present in ageing curves of different tested alloys respectively. The result of TEM observation and DSC analyses proved that the characteristics of age-hardening curves are related to the precipitation sequences of tested alloys. For A354 alloy, obvious interval during the transition from GPII zones to meta-stable phases is the main reason for two peaks aging, the first hardness peak of age hardening curve is attained depending on the high-density GPII zone, while the second one is acquired in terms of theta' and beta'mate-stable grains.
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页码：171 / 175
页数：5
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