文献类型：期刊文献

英文题名：Evaluation of stress corrosion, cracking susceptibility of stainless steel 304L with surface nanocrystallization by small punch test

作者：Bai, Tao[1];Chen, Peng[1];Guan, Kaishu[1]

机构：[1]E China Univ Sci & Technol, Key Lab Safety Sci Pressurized Syst, Minist Educ, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：561

起止页码：498

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20130716019701);WOS:【SCI-EXPANDED(收录号:WOS:000325835700064)】；

基金：The authors gratefully acknowledge the financial support provided by National Nature Science Foundation of China (Grant No. 51075148) and the State Bureau of Quality and Technical Supervision of China (201110029)

语种：英文

外文关键词：Stainless steel 304L; Surface nanocrystallization; Surface mechanical attrition treatment; Small punch test; Intergranular stress corrosion cracking; Transgranular stress corrosion cracking

摘要：In this study, the small punch test (SPT) was conducted to evaluate the stress corrosion cracking (SCC) susceptibility of stainless steel (SS) 304L with surface nanocrystallization (SNC) in 1 mol/L NaCl+0.5 mol/L HCl aq. The surface mechanical attrition treatment (SMAT) was applied to realize the SNC. The mechanical property and micro-structural evolutions of SS 304L induced by SMAT were investigated through optical microscope (OM), X-ray diffraction (XRD), micro-Vickers hardness and transmission electron microscopy (TEM). The grain size on the surface of the material was reduced to 30-100 nm. The SPT was conducted in both ambient air and corrosive solution. The results were investigated by OM and scanning electron microscopy (SEM), showing that in ambient air, the specimen with 30 min SMAT performed a higher yield strength and lower ductility than the solution annealed (SA) counterpart. The SS 304L without SMAT presented a transgranular SCC (TGSCC) mode in chloride solution. In contrast, the SNC 304L SS showed a higher SCC susceptibility with a typical intergranular SCC (IGSCC). (C) 2012 Elsevier B.V. All rights reserved.