Microstructure evolution and dynamic recrystallization mechanism induced by grinding of Ni-based single crystal superalloy

doi:10.1016/j.jmatprotec.2022.117784

IMR OpenIR

	Microstructure evolution and dynamic recrystallization mechanism induced by grinding of Ni-based single crystal superalloy
	Xu, Yunchao 1; Gong, Yadong 1; Zhang, Weijian 1; Wen, Xuelong 1; Yin, Guoqiang 1; Li, Jinguo 2; Zhao, Jibin 3
通讯作者	Gong, Yadong(gongyd@mail.neu.edu.cn)
	2022-12-01
发表期刊	JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
ISSN	0924-0136
卷号	310 页码:15
摘要	Ni-based single crystal superalloy has experienced high temperature and extreme strain rate during grinding process, resulting in white layer and plastic deformation layer on the subsurface. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and transmission Kikuchi diffraction (TKD) techniques were used to characterize the microstructure changes such as dislocation distribution, crystal structure and orientation information at the nanoscale of the ground subsurface. The mechanism of dynamic recrystallization and grain refinement of the single crystal superalloy were obtained. The results show that the high-density dislocation structure is easy to form in the stress concentration areas, which are the nucleation sites of dynamic recrystal-lization. With the accumulation of misorientation, the subgrain boundaries (SGBs) are transformed into low -angle grain boundaries (LAGBs) and high-angle grain boundaries (HAGBs). Moreover, equiaxed nanograins are formed near the top surface due to the cooperation mechanism of dislocation movement and twins. Under the condition of high strain rate, the deformation mechanism of Ni-based single crystal superalloy is continuous dynamic recrystallization (CDRX) dominated by subgrain rotation. This work illustrated the grinding-induced microstructure evolution and mechanism of dynamic recrystallization, which provides theoretical guidance for machining of single crystal blade.
关键词	Ni-based single crystal superalloy Grinding CDRX Subgrain rotation Nanograins
资助者	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
DOI	10.1016/j.jmatprotec.2022.117784
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; [U1908230] ; [N2003004]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Industrial ; Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS记录号	WOS:000871085300002
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/321006/176319
专题	中国科学院金属研究所
通讯作者	Gong, Yadong
作者单位	1.Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Shenyang Inst Automat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xu, Yunchao,Gong, Yadong,Zhang, Weijian,et al. Microstructure evolution and dynamic recrystallization mechanism induced by grinding of Ni-based single crystal superalloy[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2022,310:15.
APA	Xu, Yunchao.,Gong, Yadong.,Zhang, Weijian.,Wen, Xuelong.,Yin, Guoqiang.,...&Zhao, Jibin.(2022).Microstructure evolution and dynamic recrystallization mechanism induced by grinding of Ni-based single crystal superalloy.JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,310,15.
MLA	Xu, Yunchao,et al."Microstructure evolution and dynamic recrystallization mechanism induced by grinding of Ni-based single crystal superalloy".JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 310(2022):15.