Analysis of impact toughness variation for flat position multi-pass weld joint

	Analysis of impact toughness variation for flat position multi-pass weld joint
	Yuan, Junjun 1; Chan, Zhishan 1; Cao, Rui1 ; Mao, Gaojun 1; Xiao, George 2
	2017-05-25
发表期刊	Hanjie Xuebao/Transactions of the China Welding Institution
ISSN	0253360X
卷号	38 期号:5 页码:100-103
摘要	A multi-pass weld metal in flat position was studied, which was welded by a flux cored wire used in X70 pipeline. Analysis included observation of the fracture surfaces to determine initiation location (optical and scanning electron microscopy) and metallographic examination of the weld microstructures. It was found that the position of impact specimen is different, which will cause different impact energy; the proportion of the columnar crystal or coarse crystal area,which was near the position of impact specimen notch root, was a main reason for the impact toughness variation but is not the main reason of low values. The weld defects and coarse grain were the main reason for the variation and low values of impact toughness. When the impact energy is 54.2 J, the impact sample was cleavage fracture. Crack source were welding defects such as inclusions, the defects of incomplete fusion and so on, and the nearer the position of these defects to the notch, the smaller the impact energy. © 2017, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
关键词	Defects Fracture toughness Scanning electron microscopy Submerged melt welding Cleavage fracture Columnar crystals Fracture surfaces Metallographic examination Multi-pass weld metal Toughness variations Variation Weld microstructures
收录类别	EI
语种	中文
出版者	Harbin Research Institute of Welding
EI入藏号	20173704160727
EI主题词	Welds
EI分类号	538.2 Welding - 538.2.1 Welding Processes - 933.1 Crystalline Solids - 951 Materials Science
来源库	Compendex
分类代码	538.2 Welding - 538.2.1 Welding Processes - 951 Materials Science
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/114562
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Hobart Brothers Company, An ITW Welding Company, Troy; 45373, United States
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Yuan, Junjun,Chan, Zhishan,Cao, Rui,et al. Analysis of impact toughness variation for flat position multi-pass weld joint[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2017,38(5):100-103.
APA	Yuan, Junjun,Chan, Zhishan,Cao, Rui,Mao, Gaojun,&Xiao, George.(2017).Analysis of impact toughness variation for flat position multi-pass weld joint.Hanjie Xuebao/Transactions of the China Welding Institution,38(5),100-103.
MLA	Yuan, Junjun,et al."Analysis of impact toughness variation for flat position multi-pass weld joint".Hanjie Xuebao/Transactions of the China Welding Institution 38.5(2017):100-103.