Effect of tool pin side area ratio on temperature distribution in friction stir welding

• Published in: Results in physics Vol. 15; p. 102814
• Main Authors: Sadoun, A.M., Wagih, A., Fathy, A., Essa, A.R.S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2019; Elsevier
• Subjects: Friction stir welding; Heat generation; Semi-spherical pin; Temperature distribution; Tool area ratios; Semi-spherical pin; Heat generation; Temperature distribution; Tool area ratios; Friction stir welding
• ISSN: 2211-3797; 2211-3797
• DOI: 10.1016/j.rinp.2019.102814

•This work study the effect of tool area ratios on temperature distribution and heat generation in FSWed 7075AA.•The ratio of pin side area affects the temperature distribution due to the effect of the amount of heat generated by pin side. A tool with high ratio of pin side area increases the tensile strength.•The appropriate ratio of pin side area for a defect free joint can be in the range of 23.79–29.83%.•It could be stated that the pin area ratio is one of the main technical parameters of FSW. In present work, the friction stir welding (FSW) tools are designed with different surface areas of pin side. The transient temperatures during FSW were measured on advancing side (AS) of top surface, midpoint of the sample thickness, and center on the bottom surface. The results show that the appropriate ratio of pin side area for a defect free FSW of 7075-O Al alloy can be within the range of 23.79–29.83% at 500 rpm rotation speed and 50 mm/min welding speed. It was also found that a higher ratio of pin side area results in a joint with higher tensile strength. Using a semi-spherical pin with high ratio of pin side area (29.83%) produces a friction stir welded joint with higher tensile strength and finer grain size. Based on the presented results, it could be stated that the pin area ratio is one of the main technical parameters of friction stir welding.