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Effects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank
Alternative TitleEffects of Pulsed Current on Microstructure and Properties of Crack Tip in Remanufacturing Blank
Deng Dewei1; Liu Qianqian1; Li Xiaona1; Yu Tao3; Zhang Lin2; Wang Gang4; Zhang Hongchao3
2017
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume46Issue:8Pages:2208-2213
AbstractA 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.
KeywordRECRYSTALLIZATION COPPER METALS remanufacturing pulsed current recrystallization structure refinement
Indexed ByCSCD
Language英语
CSCD IDCSCD:6057975
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155932
Collection中国科学院金属研究所
Affiliation1.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
Recommended Citation
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.
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