Effects of Enhanced Solution Treatment on Stress Corrosion Behavior of Al-Zn-Mg-Cu Alloy
Effects of Enhanced Solution Treatment on Stress Corrosion Behavior of Al-Zn-Mg-Cu Alloy
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DOI：
10.1007/s11837-018-2737-z
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发表时间：
2018-01
期刊：
影响因子：
2.6
通讯作者：
Xiaoyan Peng;Y. Li;Qi Guo;Guo-fu Xu
中科院分区：
文献类型：
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作者：
Xiaoyan Peng;Y. Li;Qi Guo;Guo-fu Xu
研究了强化固溶处理对Al-Zn-Mg-Cu合金应力腐蚀开裂的影响。结果表明，EST后AlZnMgCu相和Al 2CuMg相的体积分数减少，从而减少了由这些残余颗粒引起的应力集中和裂纹萌生。但是，再结晶进一步发展，晶粒长大的同时。与普通样品（473°C/1 h + T73）相比，EST 503（473°C/1 h + 503°C/1 h + T73）和EST 513（473°C/1 h + 513°C/1 h + T73）的敏感性指数ISCC值分别从11.0%下降到7.2%和9.2%。而EST 523（473°C/1 h + 523°C/1 h + T73）条件下，由于过度再结晶，SCC敏感性增加，ISCC变为18.8%。
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°C/1 h + T73), the susceptibility indexISCCvalues for the EST503 (473°C/1 h + 503°C/1 h + T73) and EST513 condition (473°C/1 h + 513°C/1 h + T73) declined from 11.0% to 7.2% and 9.2%, respectively. However, the susceptibility to SCC increased for the EST523 condition (473°C/1 h + 523°C/1 h + T73) andISCCbecame 18.8%, due to excessive recrystallization.