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Microstructure of a safe-end dissimilar metal weld joint (SA508-52-316L) prepared by narrow-gap GTAW
Ming, Hongliang; Zhang, Zhiming; Wang, Jianqiu; Han, En-Hou; Wang, Peipei; Sun, Zhiyuan
2017
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume123Pages:233-243
AbstractThe microstructure, residual strain and interfacial chemical composition distribution of a safe-end dissimilar metal weld joint (DMWJ, SA508-52-316L) prepared by narrow-gap gas-tungsten arc welding (NG-GTAW) were studied by optical microscope (OM) and scanning electron microscope equipped with an energy dispersive X-ray microanalysis (SEM/EDX) and an electron back scattering diffraction (EBSD) system. Complex microstructure and chemical composition distribution are found, especially at the SA508-52 interface and the 52-316L interface. In brief, a complicated microstructure transition exists within the SA508 heat affected zone (HAZ); the residual strain, the fraction of high angle random grain boundaries and low angle boundaries decrease with increasing the distance from the fusion boundary in 316L HAZ; neither typical type II boundary nor obvious carbon-depleted zone is found near the SA508-52 interface; dramatic and complicated changes of the contents of the main elements, Fe, Cr and Ni, are observed at the distinct interfaces, especially at the SA508-52 interface. No carbon concentration is found at the SA508-52 interface. (C) 2016 Elsevier Inc. All rights reserved.; The microstructure, residual strain and interfacial chemical composition distribution of a safe-end dissimilar metal weld joint (DMWJ, SA508-52-316L) prepared by narrow-gap gas-tungsten arc welding (NG-GTAW) were studied by optical microscope (OM) and scanning electron microscope equipped with an energy dispersive X-ray microanalysis (SEM/EDX) and an electron back scattering diffraction (EBSD) system. Complex microstructure and chemical composition distribution are found, especially at the SA508-52 interface and the 52-316L interface. In brief, a complicated microstructure transition exists within the SA508 heat affected zone (HAZ); the residual strain, the fraction of high angle random grain boundaries and low angle boundaries decrease with increasing the distance from the fusion boundary in 316L HAZ; neither typical type II boundary nor obvious carbon-depleted zone is found near the SA508-52 interface; dramatic and complicated changes of the contents of the main elements, Fe, Cr and Ni, are observed at the distinct interfaces, especially at the SA508-52 interface. No carbon concentration is found at the SA508-52 interface. (C) 2016 Elsevier Inc. All rights reserved.
description.department[ming, hongliang ; zhang, zhiming ; wang, jianqiu ; han, en-hou] chinese acad sci, inst met res, liaoning key lab safety & assessment tech nucl ma, key lab nucl mat & safety assessment, shenyang 110016, peoples r china ; [ming, hongliang] univ chinese acad sci, 19 yuquan rd, beijing 100049, peoples r china ; [wang, peipei ; sun, zhiyuan] shanghai res ctr weld & detect engn tech nucl equ, shanghai 201306, peoples r china
KeywordDissimilar Metal Welded Joint Microstructure Residual Strain Narrow-gap Gtaw Ebsd
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
Funding OrganizationNational Natural Science Foundation of China [51301183]; Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JSC012]; Science and Technology Commission of Shanghai Municipality, Shanghai, P R China [14DZ2250300]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78377
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Ming, Hongliang,Zhang, Zhiming,Wang, Jianqiu,et al. Microstructure of a safe-end dissimilar metal weld joint (SA508-52-316L) prepared by narrow-gap GTAW[J]. MATERIALS CHARACTERIZATION,2017,123:233-243.
APA Ming, Hongliang,Zhang, Zhiming,Wang, Jianqiu,Han, En-Hou,Wang, Peipei,&Sun, Zhiyuan.(2017).Microstructure of a safe-end dissimilar metal weld joint (SA508-52-316L) prepared by narrow-gap GTAW.MATERIALS CHARACTERIZATION,123,233-243.
MLA Ming, Hongliang,et al."Microstructure of a safe-end dissimilar metal weld joint (SA508-52-316L) prepared by narrow-gap GTAW".MATERIALS CHARACTERIZATION 123(2017):233-243.
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