Analysis of Residual Stress on Dissimilar Butt Joint by TIG Assisted Hybrid Friction Stir Welding

Hee-Seon, Bang; Chan-Seoung, Ro; Bijoy, M.S.; Han-Sur, Bang; Yoon-Ki, Lee

doi:2012.30.2.47

J Weld Join > Volume 30(2); 2012 > Article

Journal of KWJS 2012;30(2):47-53.
DOI: https://doi.org/10.5781/KWJS.2012.30.2.47 Published online May 16, 2012.

TIG-FSW 하이브리드 용접을 이용한 이종재 맞대기 용접부의 잔류응력 해석

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Analysis of Residual Stress on Dissimilar Butt Joint by TIG Assisted Hybrid Friction Stir Welding

Bang Hee-Seon, Ro Chan-Seoung, M.S. Bijoy, Bang Han-Sur, Lee Yoon-Ki

Abstract

  This paper aimed to study and understand the mechanical phenomena of thermal elasto-plastic behavior on the dissimilar butt joint (Al 6061-T6 and STS304) by TIG assisted Friction Stir Welding. Heat conduction and residual stress analysis is carried out using in-house solver. Two-dimensional results of the heat distribution and residual stresses in dissimilar joint for particular tool geometry and material properties are presented. The predicted stress along longitudinal direction in Al 6061-T6 and STS304 are approximately between 12-15% of their respective yield strengths. A comparison is made between experimentally measured and numerically predicted equivalent residual stress values.

Key Words: Friction stir welding, Dissimilar material, Heat conduction, Residual stress, strain gauge