Solution strengthening and precipitation strengthening in spinodally decomposed Al-Zn-(Cu) alloys

被引：0
|
作者：
Li, Hong-Xiao [1 ]
Wang, Da-Peng [1 ]
Zhao, Gang [1 ]
Hao, Shi-Ming [1 ]
机构：
[1] Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2002年 / 23卷 / 05期
关键词：
Alloys - Hardness - Microstructure - Strengthening (metal) - X ray diffraction;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Microstructure evolution and accompanying hardness changes in spinodally decomposed Al-Zn-(Cu) alloys were studied by microstructure observation, X-ray diffraction and hardness measurement. The results show that the strengthening of the alloys mainly comes from the solid solution of alloying atoms, and the precipitation strengthening caused by spinodal decomposition is much less effective. The hardness increment of the AlZn-2Cu alloy caused by solution strengthening is about 1 GPa. The peak HV hardness increment caused by spinodal decomposition in the same alloy is only about 180 MPa. Adding Cu atoms improves the stability of the microstructure in Al-Zn alloy and greatly delays the aging time to reach the peak hardness state caused by spinodal decomposition. Adding 2% copper makes the hardness of the as quenched AlZn alloy be increased by 300 MPa.
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页码：447 / 450
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