Investigation of Microstructural Features Determining the Toughness of 980 MPa Bainitic Weld Metal

doi:10.1007/s11661-013-2020-4

	Investigation of Microstructural Features Determining the Toughness of 980 MPa Bainitic Weld Metal
	Cao, R.1,2 ; Zhang, X. B.3; Wang, Z.1,2 ; Peng, Y.4; Du, W. S.4; Tian, Z. L.4; Chen, J. H.1,2
	2014-02
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	45A 期号:2 页码:815-834
摘要	The microstructural features that control the impact toughness of weld metals of a 980 MPa 8 pct Ni high-strength steel are investigated using instrumented Charpy V tester, optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), electron back-scattered diffraction (EBSD), and finite-element method (FEM) calculation. The results show that the critical event for cleavage fracture in this high-strength steel and weld metals is the propagation of a bainite packet-sized crack across the packet boundary into contiguous packets, and the bainitic packet sizes control the impact toughness. The high-angle misorientation boundaries detected in a bainite packet by EBSD form fine tear ridges on fracture surfaces. However, they are not the decisive factors controlling the cleavage fracture. The effects of Ni content are essential factors for improving the toughness. The extra large cleavage facets seriously deteriorate the toughness, which are formed on the interfaces of large columnar crystals growing in welding pools with high heat input. (C) The Minerals, Metals & Materials Society and ASM International 2013
DOI	10.1007/s11661-013-2020-4
收录类别	SCI
语种	英语
资助项目	National Nature Science Foundation of China[51035004] ; National Nature Science Foundation of China[50905081]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000331094100027
出版者	SPRINGER
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/34465
专题	材料科学与工程学院外国语学院
通讯作者	Cao, R.
作者单位	1.Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Metall Mat, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Key Lab Nonferrous Met Alloys, Minist Educ, Lanzhou 730050, Peoples R China 3.Shanghai Jiao Tong Univ, Dept Mat Sci & Engn, Shanghai 200240, Peoples R China 4.Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	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	Cao, R.,Zhang, X. B.,Wang, Z.,et al. Investigation of Microstructural Features Determining the Toughness of 980 MPa Bainitic Weld Metal[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2014,45A(2):815-834.
APA	Cao, R..,Zhang, X. B..,Wang, Z..,Peng, Y..,Du, W. S..,...&Chen, J. H..(2014).Investigation of Microstructural Features Determining the Toughness of 980 MPa Bainitic Weld Metal.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,45A(2),815-834.
MLA	Cao, R.,et al."Investigation of Microstructural Features Determining the Toughness of 980 MPa Bainitic Weld Metal".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 45A.2(2014):815-834.

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