Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Effect of Matrix Microstructure on Creep Properties of Squeeze Cast Magnesium Matrix Composites

용탕 단조한 Mg복합재료의 크립특성에 미치는 기지조직의 영향

  • Kim, Byeong-Ho (Department of Materials Science and Engineering, Pusan National University) ;
  • Son, Jae-Hyoung (Department of Materials Science and Engineering, Pusan National University) ;
  • Park, Kyung-Chul (Department of Materials Science and Engineering, Pusan National University) ;
  • Park, Yong-Ho (Department of Materials Science and Engineering, Pusan National University) ;
  • Park, Ik-Min (Department of Materials Science and Engineering, Pusan National University)
  • Published : 2009.08.31
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Abstract

Effect of matrix microstructure on creep behaviors of squeeze cast magnesium matrix composites was investigated. Aluminum borate whisker was used as reinforcement and AZ31, AS52 and Sr added AS52 Mg alloys were used for matrix alloys. The reinforcement was distributed homogeneously and defect-free composite was manufactured. Creep tests were carried out at the temperature of $150^{\circ}C$ under the applied stress of 50 and 100 MPa for Mg alloys and Mg MMCs, respectively. The creep resistance of Mg MMCs was in this order: AS52-Sr > AS52 AZ31 MMCs. Void initiation during creep mainly occurred at $Mg/Mg_{17}Al_{12}$ interface and propagation went along grain boundaries. On the other hand, $Mg_2Si$ phase was not attributed to the creep void initiation.

Keywords

References

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