Synchrotron X-ray fluorescence imaging study on chloride-induced stress corrosion cracking behavior of austenitic stainless steel welds via selective corrosion of 6-ferrite

被引：10

作者：

Kim, Seunghyun ^{[1
]}

Ahn, Kangwoo ^{[2
]}

Kim, Gidong ^{[1
]}

Song, Sang -Woo ^{[1
]}

机构：

[1] Korea Inst Mat Sci, Joining Technol Dept, 797 Changwondae Ro, Changwon Si, Gyeongsangnam D, South Korea

[2] Pohang Accelerator Lab, Ind Technol Convergence Ctr, 80,Jigok Ro 127 Beongil, Pohang Si, Gyeongsangnam D, South Korea

来源：

CORROSION SCIENCE | 2023年 / 218卷

基金：

新加坡国家研究基金会;

关键词：

A; Stainless steel; B; TEM; AFS; C; Stress corrosion; PITTING CORROSION; ATMOSPHERIC CORROSION; DRY STORAGE; MOLYBDENUM; DISSOLUTION; INHIBITION; ADDITIONS; TITANIUM; FERRITE; ATTACK;

D O I：

10.1016/j.corsci.2023.111176

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Chloride-induced stress corrosion cracking (CISCC) is a degradation of austenitic stainless steels by Cl-containing media, residual stress, and materials susceptibility. In this study, synchrotron X-ray fluorescence imaging and electron microscopy were utilized to investigate the CISCC mechanism in austenitic stainless steel welds 304 LER308L and 316 L-ER316L. Specimens were exposed to 60 degrees C and 30% relative humidity conditions for 3 months and their microstructure and chemistry were analyzed. Since 6-ferrite is composed of ferrite formers especially Cr and acts as a sink for impurities, selective corrosion of 6-ferrite results in pitting corrosion and CISCC propagation.

引用

页数：13

共 48 条

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