Effects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank

IMR OpenIR

	Effects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank
其他题名	Effects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank
	Deng Dewei 1; Liu Qianqian 1; Li Xiaona 1; Yu Tao 3; Zhang Lin 2; Wang Gang 4; Zhang Hongchao 3
	2017
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	46 期号:8 页码:2208-2213
摘要	A high energy pulsed current impacting device was used to treat 316 austenitic stainless steel containing prefabricated unilateral fatigue crack aiming for remanufacturing. The influence of high density pulsed current on the microstructure at crack tip was investigated by metallographic microscope, X-ray diffraction, electron backscattered diffraction (EBSD) and transmission electron microscope (TEM). And the evolution of microstructure during melting treatment was analyzed. Results show that the structure at crack tip is obviously refined after the pulsed current processing, and the gradient structure including the columnar crystal area, recrystallization zone and matrix is observed. Due to the rapid heating and cooling, the generation of high-speed electronic wind and electrically induced plasticity effect reduce the thermodynamic barrier of recrystallization or phase change. Thus, the rate of nucleation is increased, and the grain growth process is inhibited. Therefore the grain size of recrystallization zone is smaller than that of the matrix, and hence the mechanical properties of materials are improved.
关键词	RECRYSTALLIZATION COPPER METALS remanufacturing pulsed current recrystallization structure refinement
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:6057975
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/155932
专题	中国科学院金属研究所
作者单位	1.大连理工大学 2.中国科学院金属研究所 3.大连大学 4.清华大学
推荐引用方式 GB/T 7714	Deng Dewei,Liu Qianqian,Li Xiaona,et al. Effects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46(8):2208-2213.
APA	Deng Dewei.,Liu Qianqian.,Li Xiaona.,Yu Tao.,Zhang Lin.,...&Zhang Hongchao.(2017).Effects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank.RARE METAL MATERIALS AND ENGINEERING,46(8),2208-2213.
MLA	Deng Dewei,et al."Effects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank".RARE METAL MATERIALS AND ENGINEERING 46.8(2017):2208-2213.