Unstable Temperature Distribution in Friction Stir Welding

作者：Hussein Sadiq Aziz; Thiru S^*; Izamshah R; Tahir Abd Salam Md

来源：Advances in Materials Science and Engineering, 2014, 2014: 980636.

DOI：10.1155/2014/980636

In the friction stir welding process, a nonuniform and high generated temperature is undesirable. Unstable temperature and distribution affect thermal and residual stresses along the welding line, thus necessitating mitigation. This paper presents a simple method to prevent significant temperature difference along the welding line and also to help nullifying some defect types associated with this welding, such as end-hole, initial unwelded line, and deformed areas. In the experimental investigation, a heat and force thermocouple and dynamometer were utilized while couple-field thermomechanical models were used to evaluate temperature and its distribution, plastic strain, and material displacement. The suggested method generated uniform temperature distributions. Measurement results are discussed, showing a good correlation with predictions.

• 出版日期2014