Individual and synergistic influences of microstructural features on intergranular corrosion behavior in extra-low carbon type 304L austenitic stainless steel

被引：52
作者：
Pradhan, S. K. [1 ]
Bhuyan, P. [1 ]
Mandal, S. [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
来源：
CORROSION SCIENCE | 2018年 / 139卷
关键词：
Stainless steel; Polarization; SEM; Weight loss; Effects of strain; Intergranular corrosion; GRAIN-BOUNDARY-CHARACTER; CARBIDE PRECIPITATION; SENSITIZATION BEHAVIOR; CHROMIUM DEPLETION; ENGINEERED MICROSTRUCTURE; FRACTAL ANALYSIS; RESIDUAL STRAIN; ALLOY; 600; 304-STAINLESS-STEEL; DEFORMATION;
D O I：
10.1016/j.corsci.2018.05.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The individual and synergistic effects of the microstructural features viz. grain size, residual strain, grain boundary character distribution (GBCD) and its connectivity on intergranular corrosion (IGC) behavior is evaluated in type 304 L stainless steel. Straining accelerated sensitization by promoting chromium carbide precipitation via diffusion through dislocations. Coarse-grained microstructure suppresses IGC by delaying both the onset and progression of sensitization. Microstructure comprising of optimized GBCD exhibits remarkable resistance to IGC owing to the substitution of random high-angle boundaries by Sigma 3 and its variants. Impressively, evidences suggested that GBCD has higher implication than grain size or residual strain in controlling IGC behavior.
引用
收藏
页码：319 / 332
页数：14
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