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, Rui 1; Mao, Gaojun 1; Xiao, George 2
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2017-05-25
卷号	38 期号:5 页码:100-103
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
ISSN号	0253360X
英文摘要	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.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://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
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.