Bainite nucleation mechanism and mechanical properties in low carbon bainite deposited metals with different nickel additions

doi:10.1016/j.msea.2022.144036

IMR OpenIR

	Bainite nucleation mechanism and mechanical properties in low carbon bainite deposited metals with different nickel additions
	Liu, Jingwu 1,2; Wei, Shitong 1; Lu, Shanping 1
通讯作者	Lu, Shanping(shplu@imr.ac.cn)
	2022-11-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	857 页码:10
摘要	Exploring the transformation mechanism of bainite is necessary to achieve the matching of high-strength and accepted damage tolerance for low carbon bainite deposited metals. In this work, the effect of Ni content on the bainite transformation mechanism and mechanical properties has been investigated systematically with Ni contents change from 4 wt. % to 9 wt. %. Scanning electron microscope, transmission electron microscope, and electron backscatter diffraction were used for the characterization of the microstructure. Results indicated that the nucleation method of bainite ferrite (BF) laths changed from autocatalytic nucleation to classical nucleation when the Ni content exceeded 5.5%. The deposited metals with BF laths nucleated by autocatalysis had excellent combinations of strength and toughness while the toughness severely deteriorated as the classical nucleation replaced the autocatalytic nucleation. The presence of autocatalytic nucleation resulted in the refinement of microstructure, and the density of high-angle grain boundaries had been improved effectively. In particular, apparent variant selection tendency in microstructure occurred accompanied by the disappearance of autocat-alytic nucleation. Moreover, the strong variant selection tendency resulted in numerous identical variants growing next to each other and coarsening the microstructure. In particular, the key factor for the generating of autocatalytic nucleation was that the lower interfacial energy for the new BF laths nucleated through autocat-alytic nucleation, and resulted in a lower nucleation activation energy. Therefore, autocatalytic nucleation tends to occur in the deposited metals with low bainite transformation speed due to enough time and space for new BF laths nucleates at existing BF lath.
关键词	Nickel Low-temperature toughness Nucleation method Welding
资助者	National Science Foundation of Liaoning Province ; Innovation Project of Shenyang National Laboratory for materials science ; major R&D Project of Liaoning Province
DOI	10.1016/j.msea.2022.144036
收录类别	SCI
语种	英语
资助项目	National Science Foundation of Liaoning Province[2019JH3/30100039] ; Innovation Project of Shenyang National Laboratory for materials science[SYNL-2020] ; major R&D Project of Liaoning Province[2020JH1/10100001]
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:000863557900002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：2[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/321006/176026
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,Wei, Shitong,Lu, Shanping. Bainite nucleation mechanism and mechanical properties in low carbon bainite deposited metals with different nickel additions[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,857:10.
APA	Liu, Jingwu,Wei, Shitong,&Lu, Shanping.(2022).Bainite nucleation mechanism and mechanical properties in low carbon bainite deposited metals with different nickel additions.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,857,10.
MLA	Liu, Jingwu,et al."Bainite nucleation mechanism and mechanical properties in low carbon bainite deposited metals with different nickel additions".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 857(2022):10.