Evaluation of fatigue crack propagation behavior of 316LN TIG weldments at liquid helium temperature

doi:10.1016/j.cryogenics.2020.103161

	Evaluation of fatigue crack propagation behavior of 316LN TIG weldments at liquid helium temperature
	Huang, Chuanjun 2; Xin, Jijun 1,3; Zhang, Hengcheng 2; Wei, Jing 3; Huang, Rongjin 2; Xu, Dong 2; Song, Yuntao 3; Li, Laifeng 2
刊名	CRYOGENICS
	2020-09-01
卷号	110
关键词	316LN TIG weldment Post weld heat treatment Fatigue crack propagation Strain-induced martensite transformation Cryogenic
ISSN号	0011-2275
DOI	10.1016/j.cryogenics.2020.103161
通讯作者	Xin, Jijun(xinjijun@sslab.org.cn) ; Li, Laifeng(laifengli@mail.ipc.ac.cn)
英文摘要	In the present work, fatigue crack propagation behavior of 316LN tungsten inert gas (TIG) weldment and weldment with post weld heat treatment (PWHT) was investigated at liquid helium temperature. Results indicates that the weldment with PWHT results in the highest fatigue crack propagation resistance, whereas the base material demonstrates the lowest fatigue crack propagation resistance. Microstructure evolution reveals that the fatigue crack propagation is characterized as transgranular fracture for the base material as well as the as-welded weldments and the weldment with PWHT. Moreover, the crack propagation path of the weldments shows a zigzag crack extension, especially for the weldment with PWHT, whereas the crack extension of the base material is relative straight. Electron backscattered diffraction reveals more amount of strain-induced martensite near the crack tip in the base material compared to in the as-welded weldment and in the weldment with PWHT, which is considered to be a crucial factor in the fatigue crack propagation behavior at cryogenic temperature.
资助项目	National Key R&D Program of China[2017YFE0301405] ; National Key R&D Program of China[2017YFE0301504] ; National Natural Science Foundation of China[51877209]
WOS关键词	MARTENSITIC-TRANSFORMATION ; STAINLESS-STEELS ; GROWTH ; MICROSTRUCTURE ; AUSTENITE ; EVOLUTION ; FRACTURE ; ENERGY ; GAMMA
WOS研究方向	Thermodynamics ; Physics
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000571177600008
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/104184]
专题	中国科学院合肥物质科学研究院
通讯作者	Xin, Jijun; Li, Laifeng
作者单位	1.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China 2.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Huang, Chuanjun,Xin, Jijun,Zhang, Hengcheng,et al. Evaluation of fatigue crack propagation behavior of 316LN TIG weldments at liquid helium temperature[J]. CRYOGENICS,2020,110.
APA	Huang, Chuanjun.,Xin, Jijun.,Zhang, Hengcheng.,Wei, Jing.,Huang, Rongjin.,...&Li, Laifeng.(2020).Evaluation of fatigue crack propagation behavior of 316LN TIG weldments at liquid helium temperature.CRYOGENICS,110.
MLA	Huang, Chuanjun,et al."Evaluation of fatigue crack propagation behavior of 316LN TIG weldments at liquid helium temperature".CRYOGENICS 110(2020).