화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.25, No.6, 269-273, June, 2015
DOI10.3740/MRSK.2015.25.6.269  Export Citation
Mg-11Li-3Zn-1Sn-0.4Mn 마그네슘 합금의 Ca 첨가에 따른 미세조직 및 기계적 특성평가
Effect of Ca Addtion on Microstructure and Mechanical Properties of Mg-11Li-3Zn-1Sn-0.4Mn Based Alloys
김정한1, 2, 김용호1, 유효상1, 2, 손현택1, †, 이성희2, †
  • 1한국생산기술연구원
  • 2목포대학교
Jung-Han Kim1, 2, Yong-Ho Kim1, Hyo-Sang Yoo1, 2, Hyeon-Taek Son1, †, and Seong-Hee Lee3, †
  • 1Korea institute of Industrial Technology, 1110-9 Oryong-dong, Buk-gu, Gwangju 506-824, Korea
  • 2Department of Advanced Materials Science and Engineering, Mokpo National University, 61, Dorim-ri
  • 3Department of Advanced Materials Science and Engineering, Mokpo National University, 61, Dorim-ri, Korea
E-mail:,
The effect of adding Ca on the microstructural and mechanical properties of as-cast Mg-11Li-3Zn-1Sn(wt%) alloys were investigated. Mg-11Li-3Zn-1Sn-0.4Mn with different Ca additions (0.4, 0.8, 1.2 wt%) were cast under an SF6 and Co2 atmosphere at 720 oC. The cast billets were homogenized at 400 oC for 12h and extruded at 200 oC. The microstructural and mechanical properties were analyzed by OM, XRD, SEM, and tensile tests. The addition of Ca to the Mg-11Li-3Zn-1Sn-0.4Mn alloy resulted in the formation of Ca2Mg6Zn3, MgSnCa intermetallic compound. By increasing Ca addition, the volume fraction and size of Ca2Mg6Zn3 with needle shape were increased. This Ca2Mg6Zn3 intermetallic compound was elongated to the extrusion direction and refined to fine particles due to severe deformation during hot extrusion. The elongation of the 0.8 wt% Ca containing alloy improved remarkably without reduction strength due to the formation of fine grain and Ca2Mg6Zn3 intermetallic compounds by Ca addition. It is probable that fine and homogeneous Ca2Mg6Zn3 intermetallic compounds played a significant role in the increase of mechanical properties.
Keywords:Mg-Li alloy;Ca addition;microstructure;mechanical properties
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