Effect of Pre-Recovery on Microstructure and Properties of Al-11.5Zn-3.5Mg-2.3Cu-0.24Zr-0.0025Sr Aluminum Alloy Extrusion Subjected to Solid Solution-T652 Treatment

被引：0
作者：
Xu Xiaojing [1 ]
Jiang Wei [1 ]
Deng Ping'an [1 ]
Zhang Xiangli [1 ]
Tan Cheng [1 ]
Sun Liangsheng [1 ]
Fan Yazhou [1 ]
机构：
[1] Jiangsu Univ, Zhenjiang 212013, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 03期
关键词：
pre-recovery-annealing; extrusion; tensile properties; corrosion performance;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effect of pre-recovery solid solution-T652 treatment and solid solution-T652 treatment on microstructure and properties of A1-11.5Zn-3.5Mg-2.3Cu-0.24Zr-0.0025Sr aluminum alloy extrusion were studied by micro-hardness tester and electrical conductivity test, tensile test, intergranular and exfoliation corrosion experiment, scanning electron microscope (SEM) and electron back-scattered diffraction (EBSD). The results show that pre-recovery-annealing treatment can restrain recrystallization effectively, refine the grain size, reduce the average angle of grain boundaries, and increase the percentage of low angle grain boundaries significantly. Pre-recovery-annealing can improve the yield strength and the corrosion resistance performance, and maintain the same tensile strength. The increase of the yield strength is attributed to dislocation strengthening and low angel grain boundaries strengthening.
引用
收藏
页码：796 / 801
页数：6
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