Microstructural characterization of an SA508-309L/308L-316L domestic dissimilar metal welded safe-end joint

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	Microstructural characterization of an SA508-309L/308L-316L domestic dissimilar metal welded safe-end joint
	H. L. Ming; Z. M. Zhang; J. Q. Wang; E. H. Han; W. Ke
	2014
发表期刊	Materials Characterization
ISSN	1044-5803
卷号	97 页码:101-115
摘要	The microstructure of an SA508-309L/308L-316L domestic dissimilar metal welded safe-end joint was characterized in this work by optical microscopy, scanning electron microscopy (with electron back scattering diffraction) and micro-hardness testing. Epitaxial growth and competitive growth are evident in the 308L-316L fusion boundary regions. A martensite layer, carbon-depleted zones, and type-II and type-I boundaries are found in the SA508-309L fusion boundary regions, while only martensite and austenite mixed zones are observed in the SA508-308L fusion boundary regions. The microstructure near the fusion boundary and the microstructure transition in the SA508 heat affected zone are quite complex. Both for SA508-309L/308L and 308L-316L, the highest residual strain is located on the outside of the weldment. The residual strain and the grain boundary character distribution change with increasing distance from the fusion boundary in the heat affected zone of 316L. Micro-hardness measurements also reveal non-uniform mechanical properties across the weldment. (C) 2014 Elsevier Inc. All rights reserved.
部门归属	[ming, hongliang ; zhang, zhiming ; wang, jianqiu ; han, en-hou ; ke, wei] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china. ; wang, jq (reprint author), chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china. ; wangjianqiu@imr.ac.cn
关键词	Dissimilar Metal Welded Joint Sa508-309l/308l-316l Electron Back Scattering Diffraction Residual Strain Micro-hardness Stress-corrosion Cracking Austenitic Stainless-steel Low-alloy Steel Fusion Boundary Region Heat-affected Zones High-temperature Mechanical-properties Transition Region Dissolved-oxygen Water
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73343
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. L. Ming,Z. M. Zhang,J. Q. Wang,et al. Microstructural characterization of an SA508-309L/308L-316L domestic dissimilar metal welded safe-end joint[J]. Materials Characterization,2014,97:101-115.
APA	H. L. Ming,Z. M. Zhang,J. Q. Wang,E. H. Han,&W. Ke.(2014).Microstructural characterization of an SA508-309L/308L-316L domestic dissimilar metal welded safe-end joint.Materials Characterization,97,101-115.
MLA	H. L. Ming,et al."Microstructural characterization of an SA508-309L/308L-316L domestic dissimilar metal welded safe-end joint".Materials Characterization 97(2014):101-115.