Unstable Temperature Distribution in Friction Stir Welding

• Main Authors: Aziz Hussein, Sadiq, S., Thiru, Izamshah, Raja, Md Tahir, Abd Salam
• Format: Article
• Language: English
• Published: Hindawi Publishing Corporation 2014
• Subjects: TJ Mechanical engineering and machinery; TS Manufactures
• Online Access: http://eprints.utem.edu.my/id/eprint/13507/1/980636.v2.pdf; http://eprints.utem.edu.my/id/eprint/13507/; http://www.hindawi.com/journals/amse/
• Institution: Universiti Teknikal Malaysia Melaka

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