Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on the Creep Deformation Behavior of Mg-Zn-Mn-(Ca) Alloys

Mg-Zn-Mn-(Ca)합금의 크리이프 변형거동에 관한 연구

  • Kang, Dae-Min (Department of Mechanical Engineering, Pukyong National University) ;
  • Koo, Yang (Department of Mechanical Engineering, Pukyong National University) ;
  • Sim, Sung-Bo (Department of Mechanical Engineering, Pukyong National University)
  • 강대민 (부경대학교 기계공학부) ;
  • 구양 (부경대학교 기계공학부) ;
  • 심성보 (부경대학교 기계공학부)
  • Published : 2006.09.01
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Abstract

In this paper, creep tests of Mg-Zn-Mn and Mg-Zn-Mn-Ca alloys, which were casted by mold with Mg-3%Zn-1%Mn and Mg-3%Zn-1%Mn-0.2%Ca, were done under the temperature range of 473-573K and the stress range of 23.42-78.00Mpa. The activation energies and the stress exponents were measured to investigate the creep plastic deformation of those alloys, and the rupture lifes of Mg-Zn-Mn alloy were also measured to investigate the fracture behavior. From the results, the activation energy of Mg-Zn-Mn and Mg-Zn-Mn-Ca alloys under the temperature range of 473-493K were measured as 149.87, 145.98KJ/mol, respectively, and the stress exponent were measured as 5.13, 6.06 respectively. Also the activation energies Mg-Zn-Mn and Mg-Zn-Mn-Ca alloys under the temperature range of 553-573K were obtained as 134.41, 129.22KJ/mol, respectively, and tress exponent were obtained as 3.48, 4.63, respectively. Finally stress dependence of rupture life and the activation energy of rupture life of Mg-Zn-Mn under the temperature range of 473-493K was measured as 8.05, 170.0(KJ/mol), respectively, which were a little higher than the results of steady state creep.

Keywords

References

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