Effects of Enhanced Solution Treatment on Stress Corrosion Behavior of Al-Zn-Mg-Cu Alloy

被引：15
作者：
Peng, Xiaoyan [1 ]
Li, Yao [1 ]
Guo, Qi [1 ]
Xu, Guofu [1 ,2 ]
机构：
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Minist Educ, Key Lab Nonferrous Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
JOM | 2018年 / 70卷 / 11期
关键词：
MECHANICAL-PROPERTIES; CONSTITUENT PARTICLES; LOCALIZED CORROSION; MICROSTRUCTURE; PRECIPITATION; DISSOLUTION; FRACTURE; CRACKING;
D O I：
10.1007/s11837-018-2737-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effects of enhanced solution treatment (EST) on stress corrosion cracking (SCC) of Al-Zn-Mg-Cu alloy were studied. The results suggest that the volume fractions of AlZnMgCu phase and Al2CuMg phase decreased after EST, thus stress concentrators and crack initiations caused by these residual particles were reduced. However, recrystallization developed further and grains grew coarser at the same time. Compared with the ordinary sample (473 degrees C/1h+T73), the susceptibility index I-SCC values for the EST503 (473 degrees C/1h+503 degrees C/1h+T73) and EST513 condition (473 degrees C/1h+513 degrees C/1h+T73) declined from 11.0% to 7.2% and 9.2%, respectively. However, the susceptibility to SCC increased for the EST523 condition (473 degrees C/1h+523 degrees C/1h+T73) and I-SCC became 18.8%, due to excessive recrystallization.
引用
收藏
页码：2692 / 2697
页数：6
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