대한용접접합학회:학술대회논문집 (Proceedings of the KWS Conference)

대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지

AZ31과 AZ91의 마찰교반용접부 결정립 크기 제어

Control of Grain Size on Friction Stir Welded AZ31 and AZ91

  • 권기수 (한국생산기술연구원 생산기반기술본부 정밀접합팀, 마이크로조이닝센터) ;
  • 이창우 (한국생산기술연구원 생산기반기술본부 정밀접합팀, 마이크로조이닝센터) ;
  • 김목순 (인하대하교, 신소재공학부) ;
  • ;
  • 김정한 (한국생산기술연구원 생산기반기술본부 정밀접합팀, 마이크로조이닝센터)
  • 발행 : 2007.11.15
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초록

It was carried out to evaluate microstructure and mechanical properties of friction stir welded(FSW) on magnesium alloys. Two types magnesium alloy was used in this work, AZ31 wrought and AZ91 cast magnesium alloy. Microstructure near the weld zone showed general weld structures such as stir zone(SZ), thermo-mechanically affected zone(TMAZ) and heat affected zone(HAZ). In the AZ91 alloy, the SZ had a fine grain size and $\beta$ phase particles which were well distributed in matrix. It was characterized to redistribute by partial or full re-solution of the $\beta$ phase which is coarse in base metal during FSW processing. The hardness of the SZ slightly increase than the base metal in AZ31 Mg alloy.

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