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
收藏
页数：13
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