Prediction of temperature distribution and thermal history during friction stir welding: input torque based model

✍ Scribed by Khandkar, M. Z. H.; Khan, J. A.; Reynolds, A. P.

• Book ID: 125843585
• Publisher: Maney Publishing
• Year: 2003
• Tongue: English
• Weight: 384 KB
• Volume: 8
• Category: Article
• ISSN: 1362-1718
• DOI: 10.1179/136217103225010943

✦ Synopsis

A novel three-dimensional thermal model is proposed to study the transient temperature distributions during the friction stir welding of aluminium alloys. The moving heat source engendered by the rotation and linear traverse of the pin tool has been correlated with the actual machine power input. This power, obtained from experimental investigation, has been distributed to the different interfaces formed between the tool and the weldpiece based on the torques generated at different tool surfaces. Temperature dependent properties of the weld material have been used for the nite element based numerical modelling. Good agreement between the simulated temperature pro les and experimental data has beendemonstrated.The effectsof various heattransfer conditionsat the bottom surface of the workpiece, thermal contact conductances at the interface between the workpiece and backing plate and different backing plate materials on the thermal pro le in the weld material have also been investigated numerically.

STWJ/343