Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal

doi:10.1016/j.msea.2022.142893

IMR OpenIR

	Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal
	Liu, Jingwu 1,2; Sun, Jian 1; Wei, Shitong 1; Lu, Shanping 1
通讯作者	Lu, Shanping(shplu@imr.ac.cn)
	2022-04-18
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	840 页码:12
摘要	The strength-toughness trade-off theory is always the focus in the field of high-strength structure materials. Especially for the deposited metals, the matching of high-strength and accepted toughness is difficult to achieve. In this work, the nucleation mechanism of bainite ferrite (BF) and impact toughness were investigated systematically for the deposited metals with different chromium (Cr) contents (0.3 wt %, 0.6 wt % and 1.0 wt %). The microstructure of the deposited metals with different Cr contents was analyzed by a combination of multiple analytical tools: scanning electron microscope, transmission electron microscope and electron backscatter diffraction. The results revealed that autocatalytic nucleation during the bainite transformation had a significant effect on the microstructure evolution and the impact toughness due to the complex crystallographic orientation of BF. As the Cr content increased, the autocatalytic effect became weaker, and the selection tendency of variants enhanced. The autocatalytic nucleation during bainite transformation was primarily controlled by the transformation kinetics of BF. Enough space at the side of the existing BF resulted from the low transformation speed of bainite was necessary for the occurrence of autocatalytic nucleation. In addition, toughness decreased as autocatalytic nucleation weakened due to the coarsening of microstructure and appearance of coalesced bainite in the microstructure of deposited metal. The interlaced BF arrangement could bring a better combination of high strength and toughness for the deposited metals.
关键词	Chromium content Impact toughness Autocatalytic nucleation Coalesced bainite Deposited metal
资助者	major R&D Project of Liaoning Province ; National Science Foundation of Liaoning Province ; Innovation Project of She-nyang National Laboratory for materials science ; National Natural Science Foundation of China
DOI	10.1016/j.msea.2022.142893
收录类别	SCI
语种	英语
资助项目	major R&D Project of Liaoning Province[2020JH1/10100001] ; National Science Foundation of Liaoning Province[2019JH3/30100039] ; Innovation Project of She-nyang National Laboratory for materials science ; National Natural Science Foundation of China ; [52101060]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000776440800002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/172985
专题	中国科学院金属研究所
通讯作者	Lu, Shanping
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jingwu,Sun, Jian,Wei, Shitong,et al. Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,840:12.
APA	Liu, Jingwu,Sun, Jian,Wei, Shitong,&Lu, Shanping.(2022).Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,840,12.
MLA	Liu, Jingwu,et al."Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 840(2022):12.