Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
권호 표지

Microstructures and Mechanical Properties of Friction Stir Welds of Oxygen Free Copper

FSW에 의한 무산소동 접합부의 조직 및 기계적 성질

  • Park Hwa-Soon (Dept. of Materials Science and Engineering, Pukyong National University) ;
  • Lee Byung-Woo (Dept. of Materials Science and Engineering, Pukyong National University)
  • 박화순 (부경대학교 공과대학 신소재공학부) ;
  • 이병우 (부경대학교 공과대학 신소재공학부)
  • Published : 2005.02.01
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Abstract

The structures and mechanical properties of friction stirred welds of oxygen free copper(OFC) sheet were investigated. Defect-free welds were obtained in a relatively wide range of the welding conditions from 1000 to 2000 rpm, and welding speed from 500 to 2000 mm/min. The microstructure of the stirred zone(SZ) showed recrystallized grains, and the gram size varied largely with the welding conditions. The SZ hardness values including those of all the optimum welding conditions were slightly lower than that of the base metal, and increased with decreasing heat input. The tensile strength of the all-SZ increased with increasing the hardness values. The Hall-Fetch relationship was confirmed between the yield strength of the all-52 and the recrystallized grain size of the SZ.

Keywords

References

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