Discovering the nanoscale origins of localized corrosion in additive manufactured stainless steel 316L by liquid cell transmission electron microscopy

被引：21

作者：

Tian, Mengkun ^{[1
]}

Choundraj, Jahnavi Desai ^{[2
]}

Voisin, Thomas ^{[3
]}

Wang, Y. Morris ^{[4
]}

Kacher, Josh ^{[2
]}

机构：

[1] Georgia Inst Technol, Inst Elect & Nanotechnol, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[3] Lawrence Livermore Natl Lab, Mat Sci Div, Livermore, CA USA

[4] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA USA

来源：

CORROSION SCIENCE | 2022年 / 208卷

关键词：

TEM; Corrosion; Additive manufacturing; Stainless steel; MICROSTRUCTURE; RESISTANCE; SURFACE;

D O I：

10.1016/j.corsci.2022.110659

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use liquid cell scanning transmission electron microscopy (STEM) to directly characterize the nanoscale origins of corrosion initiation in Additive manufacturing (AM) 316 L stainless steel. Under applied anodic po-tentials, we found that the dislocation cellular boundaries were preferentially corroded and that regions of localize corrosion occurred along the cellular boundaries. We directly observed the earliest stages of corrosion by controlling the biasing parameters to decelerate the corrosion processes. The results show that highly localized corrosion occurs via inclusion dissolution along dislocation cell boundaries. More widespread corrosion initiates at the dislocation cell boundaries and spreads throughout the dislocation networks.

引用

页数：6

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