期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 218, 期 -, 页码 62-70出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2014.11.037
关键词
Solidification cracking; Mechanical constraint intensity; Crack initiation and propagation; Laser welding; Aluminum alloys
资金
- National Natural Science Foundation of China [51204109]
- State Key Program of National Natural Science Foundation of China [51035004]
Effects of mechanical constraint intensity on solidification cracking behavior were investigated in single-side and double-side constraint conditions, respectively. A numerical model was developed to simulate the solidification cracking behavior during the laser welding process. The mechanical strain and accumulated crack-tip displacement were adopted to analyze the susceptibility of crack initiation and propagation, respectively. Results show that crack behavior is greatly influenced by mechanical constraint intensity. Stronger constraint intensity promotes the initiation of crack for both single-side and double-side constraint conditions. Higher constraint intensity tends to promote crack propagation in single-side constraint condition, and helps to suppress crack propagation in double-side constraint condition. (C) 2014 Elsevier B.V. All rights reserved.
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