期刊
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
卷 19, 期 1, 页码 52-59出版社
TAYLOR & FRANCIS LTD
DOI: 10.1179/1362171813Y.0000000165
关键词
Resistance spot welding; DP980; Pulsed current pattern; Cross tensile test; Tear test; In situ observation; Microstructure
资金
- Priority Assistance for the Formation of Worldwide Renowned Centers of Research-The Global COE Program
- [24760599]
- Grants-in-Aid for Scientific Research [24760599] Funding Source: KAKEN
Dual phase 980 MPa grade (DP980) steel sheets were resistance spot welded using a pulsed current, and the effects of the pulsed current on the strength properties of the joints were investigated. The pulsed current improved the mechanical properties of the joints in cross tensile tests. In situ observations during tear tests revealed that the ductility of the nugget was improved and that the propagation of cracks into the nugget was inhibited when the pulsed current was used. Microstructural observations and electron probe microanalysis (EPMA) of the nugget showed that the segregation of phosphorus at the nugget was reduced in the joint welded using the pulsed current, suggesting that the pulsed current improved the ductility of the nugget by altering their microstructures.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据