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Effects of Boron on the Microstructure, Ductility-dip-cracking, and Tensile Properties for NiCrFe-7 Weld Metal
Mo, Wenlin; Hu, Xiaobing; Lu, Shanping; Li, Dianzhong; Li, Yiyi; shplu@imr.ac.cn
2015
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume31Issue:12Pages:1258-1267
AbstractThe distribution of boron and the microstructure of grain boundary (GB) precipitates (M-23(C, B)(6) and M2B) have been analyzed with their effects on the susceptibility of ductility-dip-cracking (DDC) and tensile properties for NiCrFe-7 weld metal, using optical microscopy (OM), secondary ion mass spectroscopy (SIMS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results show that boron segregates at GBs in NiCrFe-7 weld metal during the welding process. The segregation of boron at GBs promotes the formation of continuous M-23(C, B)(6) carbide chains and M2B borides along GBs. The addition of boron aggravates GB embrittlement and causes more DDC in the weld metal, by its segregation at GBs presenting as an impurity, and promoting the formation of larger and continuous M-23(C, B)(6) carbides, and M2B borides along GBs. DDC in the weld metal deteriorates the ductility and tensile strength of the weld metal simultaneously. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
description.department[mo, wenlin ; hu, xiaobing ; lu, shanping ; li, dianzhong ; li, yiyi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [mo, wenlin ; lu, shanping] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china
KeywordBoron M23c6 M2b Ductility-dip-cracking Tensile Properties
Funding OrganizationNational Natural Science Foundation of China [51474203]; Key Research Program of the Chinese Academy of Sciences [KGZD-EW-XXX-2]
Indexed Bysci
Language英语
WOS IDWOS:000366158000015
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74781
Collection中国科学院金属研究所
Corresponding Authorshplu@imr.ac.cn
Recommended Citation
GB/T 7714
Mo, Wenlin,Hu, Xiaobing,Lu, Shanping,et al. Effects of Boron on the Microstructure, Ductility-dip-cracking, and Tensile Properties for NiCrFe-7 Weld Metal[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2015,31(12):1258-1267.
APA Mo, Wenlin,Hu, Xiaobing,Lu, Shanping,Li, Dianzhong,Li, Yiyi,&shplu@imr.ac.cn.(2015).Effects of Boron on the Microstructure, Ductility-dip-cracking, and Tensile Properties for NiCrFe-7 Weld Metal.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,31(12),1258-1267.
MLA Mo, Wenlin,et al."Effects of Boron on the Microstructure, Ductility-dip-cracking, and Tensile Properties for NiCrFe-7 Weld Metal".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 31.12(2015):1258-1267.
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