Improvement of microstructure and surface behaviors of welded S50C steel components under electropulsing assisted ultrasonic surface modification

被引:9
|
作者
Ye, Yongda [1 ,2 ]
Kuang, Jie [1 ,2 ]
Kure-Chu, Song-Zhu [3 ]
Song, Guolin [1 ]
Sun, Zhiyan [1 ,2 ]
Tang, Guoyi [1 ,2 ]
机构
[1] Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China
[2] Tsinghua Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Mat, Beijing 100084, Peoples R China
[3] Iwate Univ, Dept Chem & Bioengn, Morioka, Iwate 0208550, Japan
关键词
hardness; microstructure; AUSTENITIC STAINLESS-STEEL; HIGH-ENERGY ELECTROPULSES; RESIDUAL-STRESS; MECHANICAL-PROPERTIES; TITANIUM-ALLOY; AISI; 304-STAINLESS-STEEL; TEXTURE EVOLUTION; MG-3AL-1ZN ALLOY; ELECTRIC-CURRENT; IMPACT TREATMENT;
D O I
10.1557/jmr.2016.127
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effect of electropulsing assisted ultrasonic surface modification (EUSM) on microstructure and surface properties of S50C steel welded components is investigated. Compared with conventional ultrasonic surface modification (USM) process, EUSM process achieves significant improvements in microstructure, including deeper strengthened layers and gradient microstructure on the surface. The EUSM-induced microstructure results in higher levels of surface compressive residual stress and greater surface microhardness and its effective depth. Conventional USM process is inevitably accompanied by some plastic damages, such as pit and crack defects. The damages, however, can be eliminated to some extent during the EUSM process. These enhancements may be attributed to the thermal and athermal effects caused by electropulsing treatment, which accelerates the mobility of dislocations in the dynamic recrystallization process.
引用
收藏
页码:2125 / 2135
页数:11
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