Formation mechanism of ductility dip cracking in 690 nickel-based alloy weld

doi:10.12073/j.hjxb.20160308001

	Formation mechanism of ductility dip cracking in 690 nickel-based alloy weld
	Zhu, Liang; Yao, Wenxuan
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2017-12-25
卷号	38 期号:12 页码:9-13
关键词	Deformation Ductility Metal testing Nickel alloys Plastic flow Stresses Tensile testing Textures Welds Wire Crack propagation direction Deformation temperatures Ductility-dip cracking Formation mechanism Generation mechanism High temperature tensile tests Nickel based alloy Threshold stress
ISSN号	0253360X
DOI	10.12073/j.hjxb.20160308001
英文摘要	To understand the generation mechanism of crack in weld made with nickel base alloy welding wire ERNiCrFe-7 and ERNiCr-4 from mechanical point, high temperature tensile tests were carried out on Thermorestor-W simulation test machine, and a new crack sensitivity criterion-threshold stress was put forward. The crack sensitivity under various temperatures was evaluated by combining with threshold strain. The results showed that the degree between the crack propagation direction and loading direction was about 90°. When the deformation temperature was below 950, the threshold stress decreased fast with the increase of temperature. The most sensitive deformation temperature range for two wires to produce crack was 950-1 150. Compared with ERNiCrFe-4 wire, the threshold stress for cracks with ERNiCr-7 wire was smaller. The flow stress was the main factor to produce crack. When the flow stress exceeded the threshold stress, intergranular crack easily formed. © 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/114345]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhu, Liang,Yao, Wenxuan. Formation mechanism of ductility dip cracking in 690 nickel-based alloy weld[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2017,38(12):9-13.
APA	Zhu, Liang,&Yao, Wenxuan.(2017).Formation mechanism of ductility dip cracking in 690 nickel-based alloy weld.Hanjie Xuebao/Transactions of the China Welding Institution,38(12),9-13.
MLA	Zhu, Liang,et al."Formation mechanism of ductility dip cracking in 690 nickel-based alloy weld".Hanjie Xuebao/Transactions of the China Welding Institution 38.12(2017):9-13.