Effects of Tool Plunge Position on Mechanical Properties of Friction-stir-weleded Region in A6061-T6/AZ31 Dissimilar Metals

Lee, Kwang-Jin; Kim, Sang-Hyuk

doi:2012.30.5.22

J Weld Join > Volume 30(5); 2012 > Article

Journal of KWJS 2012;30(5):22-26.
DOI: https://doi.org/10.5781/KWJS.2012.30.5.22 Published online November 30, 2012.

A6061-T6/AZ31 이종금속 마찰교반접합부의 기계적 특성에 미치는 툴 삽입위치의 영향

Effects of Tool Plunge Position on Mechanical Properties of Friction-stir-weleded Region in A6061-T6/AZ31 Dissimilar Metals

Kwang-Jin Lee, Sang-Hyuk Kim

Abstract

  Butt-joints of A6061-T6 and AZ31 plates were successfully manufactured by using a friction stir welding method. Off-set free joints and off-set joints were fabricated to investigate the effect of the tool plunge position on the mechanical properties of the joints. Hardness test, tensile test and charpy impact test was performed to evaluate the mechanical properties of the joints. Off-set condition resulted in increase of mechanical properties of the joints. The variation of the hardness distribution in the SZ was also stabilized in the off-set condition. Tensile strength of the off-set joint was about 85% against to that of the AZ31 base metal. Impact absorption energy by Charpy-Impact-Test of the off-set joint also increased by almost 2 times against to that of the AZ31 base metal.

Key Words: Friction stir welding, Tool plunge position, Mechanical properties, A6061-T6, AZ31