期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 32, 期 7, 页码 671-675出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2016.03.005
关键词
Friction stir lap welding; Reverse-threaded pin; Hook; Fracture position
资金
- National Natural Science Foundation of China [51204111]
- Natural Science Foundation of Liaoning Province [2013024004, 2014024008]
- Project of Science and Technology Department of Liaoning Province [2013222007]
- Aeronautical Science Foundation of China [2014ZE54021]
In friction stir welding (FSW), tool geometry plays an important role in joint quality. In order to improve mechanical properties of friction stir lap welding (FSLW) joint, a tool with a reverse-threaded pin was designed in the present study. Using 2024-T4 aluminum alloy as the research object, tools with the full-threaded pin and reverse-threaded pin were used in FSLW. Results showed that, when using the same parameter combination, FSLW joint using the reverse-threaded pin owned bigger effective sheet thickness ( EST), bigger lap width and better lap shear failure strength. Compared with the full-threaded pin, fracture mode of the FSLW joint changed from shear fracture mode to tensile fracture mode when the reverse-threaded pin was used. Fracture morphologies presented ductile fracture. Copyright (C) 2016, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.
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