Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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Evaluation of Mechanical Properties of Friction Stir Welded A6061-T6

마찰교반용접한 A6061-T6의 기계적특성 평가

  • Seo-Hyun Yun (Dept. of Die System, Changwon Campus of Korea Polytechnics) ;
  • Sang-Hyun Park (Sungwoo Hitech Technology Research Center) ;
  • Ki-Woo Nam (Dept. of Materials Science and Engineering, Pukyong National University)
  • 윤서현 (한국폴리텍대학 창원캠퍼스 금형시스템과) ;
  • 박상현 (성우하이텍 기술연구소) ;
  • 남기우 (부경대학교 재료공학과)
  • Received : 2023.11.06
  • Accepted : 2023.11.30
  • Published : 2024.02.28
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Abstract

In this study, the mechanical properties of friction stir welded A6061-T6 were evaluated. This material is used as a battery pack case material for electric vehicles. The Vickers hardness, tensile strength, and yield stress of the friction stir welding (FSW) specimen were all smaller than those of the base metal specimen. As the heat input increased, the nugget zone widened, and there were differences in hardness according to the base metal zone, heat affected zone, thermal-mechanical affected zone, and nugget zone. Mechanical properties were not proportional to heat input, and the thermal-mechanical affected zone on the advancing side was the smallest in all conditions. This is because the material flow speed increased on the advancing side, where the welding direction and the tool rotation direction were the same, forming a distinct boundary with mechanical deformation.

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References

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