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Microstructure, Residual Strain and Stress Behavior in 316L Heat-Affected Zone
Ming, HL; Zhang, ZM; Xiu, PY; Wang, JQ; Han, EH; Ke, W; Su, MX; Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, Shenyang 110016, Peoples R China.
2016-09-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume29Issue:9Pages:848-858
AbstractAustenitic stainless steels are usually chosen to make many components of nuclear power plants (NPPs). However, their microstructure in the heat-affected zone (HAZ) will change during the welding process. Some failures of the weld joints, mainly stress corrosion cracking (SCC), have been found to be located in the HAZ. In this research, the microstructure, micro-hardness, residual strain and SCC behavior at different locations of the 316L HAZ cut from a safe end dissimilar metal weld joint were studied. However, traditional optical microscope observation could not find any microstructural difference between the HAZ and the base metal, higher residual strain and micro-hardness, and higher fraction of random high-angle grain boundaries were found in the HAZ than in the base metal when studied by using electron back-scattering diffraction scanning and micro-hardness test. What's more, the residual strain, the micro-hardness and the fraction of random grain boundaries decreased, while the fraction of coincidence site lattice grain boundaries increased with increasing the distance from the fusion boundary in 316L HAZ. Creviced bent beam test was applied to evaluate the SCC susceptibility at different locations of 316L HAZ and base metal. It was found that the HAZ had higher SCC susceptibility than the base metal and SCC resistance increased when increasing the distance from the fusion boundary in 316L HAZ.
description.department[ming, hong-liang ; zhang, zhi-ming ; xiu, peng-yuan ; wang, jian-qiu ; han, en-hou ; ke, wei] chinese acad sci, inst met res, key lab nucl mat & safety assessment, liaoning key lab safety & assessment tech nucl ma, shenyang 110016, peoples r china ; [ming, hong-liang] univ chinese acad sci, beijing 100049, peoples r china ; [su, ming-xing] shanghai res ctr weld & detect engn tech nucl equ, shanghai 201306, peoples r china
KeywordAustenitic Stainless Steels Heat-affected Zone Microstructure Ebsd Residual Strain Stress Corrosion Cracking
Subject AreaMetallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51301183]; Science and Technology Commission of Shanghai Municipality, Shanghai, China [14DZ2250300]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76276
Collection中国科学院金属研究所
Corresponding AuthorWang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Ming, HL,Zhang, ZM,Xiu, PY,et al. Microstructure, Residual Strain and Stress Behavior in 316L Heat-Affected Zone[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2016,29(9):848-858.
APA Ming, HL.,Zhang, ZM.,Xiu, PY.,Wang, JQ.,Han, EH.,...&Wang, JQ .(2016).Microstructure, Residual Strain and Stress Behavior in 316L Heat-Affected Zone.ACTA METALLURGICA SINICA-ENGLISH LETTERS,29(9),848-858.
MLA Ming, HL,et al."Microstructure, Residual Strain and Stress Behavior in 316L Heat-Affected Zone".ACTA METALLURGICA SINICA-ENGLISH LETTERS 29.9(2016):848-858.
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