Mg-Zn-Mn-(Ca)합금의 크리이프 활성화에너지와 응력지수 = The Activation Energy and Stress exponent Mg-Zn-Mn-(Ca) Alloy

다국어 초록 (Multilingual Abstract)

In this paper, creep tests of Mg-Zn-Mn and Mg-Zn-Mn-Ca alloy casted by mold under the temperature range of 200-300℃, and the stress range of 2.39-7.96㎏f/㎟ were done with the automatic controlled temperature and computer for data acquisition. The activation energies were obtained by relationship between creep rate and temperature, and the stress exponents were obtained by relationship between creep rate and stress. From the experiment results, the activation energies of Mg-Zn-Mn and Mg-Zn-Mn-Ca alloy were 149.87kJ/㏖, 147.97kJ/㏖, respectively, and the stress exponents of those alloy were 5.13, 5.59, respectively ,under the temperature of 200-220℃ and 6.37-7.96㎏f/㎜2. And the activation energies of those alloy were 134.41kJ/㏖, 129.22kJ/㏖, respectively, and the stress exponent of those alloy were 3.48, 3.77, respectively, under the temperature of 280-300℃ and 2.39-3.98㎏f/㎜2. In addition, the activation energy decreased with increasing applied stress, and stress exponent decreased with increasing temperature. Finally surface fractured was showed grain and dimple behavior by SEM.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험방법
• 3. 실험결과 및 고찰
• 4. 결론
• 참고 문헌