The determination of the weakest zone and the effects of the weakest zone on the impact toughness of the 12Cr2Mo1R welded joint

doi:10.1016/j.jmapro.2020.01.014

	The determination of the weakest zone and the effects of the weakest zone on the impact toughness of the 12Cr2Mo1R welded joint
	Cao, Rui 1; Yang, Zhaoqing 1; Chan, Zhishan 1; Lei, Wanqing 2; Li, Jinmei 2; Zhang, Jianxiao 3; Liang, Xiaowu 3; Chen, Jianhong 1
刊名	Journal of Manufacturing Processes
	2020-02-01
卷号	50 页码:539-546
关键词	Bainite Fracture toughness Heat affected zone Microstructure Welded steel structures Welding 12Cr2Mo1R Base metals Charpy toughness Charpy v-notch impact tests Coarse grain heat affected zone Coarse grained heat affected zone Granular bainites Weld metal
ISSN号	15266125
DOI	10.1016/j.jmapro.2020.01.014
英文摘要	For the actual welded joints, determination of the weakest zone in the welded and the effects of the weakest zone is very important in characterization of the welded joints. In this paper, microstructure feature and charpy toughness of the 12Cr2Mo1R for pressure vessels steel welded joints were systematically investigated. The standard Charpy V-notch impact test specimens were prepared on the base metal, weld metal and various zones of the heat affected zone. The weakest zone of the 12Cr2Mo1R welded joint and its effects on the impact toughness of the welded joint were studied. It shows that at −30 °C, the weakest zone of the welded joint is the coarse-grained heat affected zone (CGHAZ), which impact toughness is 65 J, and its microstructure is composed of a large number of coarse granular bainite and a few blocks ferrite. With the fraction of CGHAZ on the ligament at the notch tip increases, the impact toughness decreases. The closer the CGHAZ location from the notch is, the less the impact toughness of the sample is. Above two aspects fully reflect the effect of the weakest zone on the toughness of the joint. This work reveals the effect of fraction of weakest zone in front of the notch tip on the impact toughness of the 12Cr2Mo1R welded joints. © 2020
WOS研究方向	Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000513922000052
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115589]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Lanzhou Ls Testing Technology Co. Ltd, Lanzhou; 730050, China; 3.Lanzhou Ls Heavy Equipment Co. Ltd, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Cao, Rui,Yang, Zhaoqing,Chan, Zhishan,et al. The determination of the weakest zone and the effects of the weakest zone on the impact toughness of the 12Cr2Mo1R welded joint[J]. Journal of Manufacturing Processes,2020,50:539-546.
APA	Cao, Rui.,Yang, Zhaoqing.,Chan, Zhishan.,Lei, Wanqing.,Li, Jinmei.,...&Chen, Jianhong.(2020).The determination of the weakest zone and the effects of the weakest zone on the impact toughness of the 12Cr2Mo1R welded joint.Journal of Manufacturing Processes,50,539-546.
MLA	Cao, Rui,et al."The determination of the weakest zone and the effects of the weakest zone on the impact toughness of the 12Cr2Mo1R welded joint".Journal of Manufacturing Processes 50(2020):539-546.