Microstructural Dependence of Stress-Corrosion Cracking Behavior in Commercial Al-Zn-Mg-Cu alloy (AA 7075).

被引：0

作者：

Pyun, Su-II ^{[1
]}

Suh, Tae-Suk ^{[1
]}

Kim, Hong-Pyo ^{[1
]}

机构：

[1] Korea Advanced Inst of Science &, Technology, Seoul, South Korea, Korea Advanced Inst of Science & Technology, Seoul, South Korea

来源：

Werkstoffe und Korrosion | 1987年 / 38卷 / 03期

关键词：

CORROSION - Stress Corrosion Cracking;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The stress corrosion cracking (SCC) behavior of commercial Al-Zn-Mg-Cu alloy (AA 7075) has been investigated by measuring the relative fracture energy under constant strain rate as a function of microstructural parameters such as precipitate free zone (pfz) width, precipitate (ppt) size in the grain boundaries (gbs) and coherence of ppts in the grain. The SCC specimens were so aged that a given variation in one feature could be produced nearly without a concomitant change in the other variables. The respectively obtained change in microstructural variables was identified by transmission electron microscopy (TEM). SCC tests were conducted in an aqueous 3. 5 wt. % NaCl solution of pH equals 1 at the temperature of 30 degree C with an applied corrosion potential of the specimen. It is suggested from the present experimental results that the effect of coherency of ppts in the grain on the resistance ot SCC is stronger than the influence of ppt size in the gbs, while pfz width scarcely influences any resistance to SCC.

引用

页码：129 / 134