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0.5T<sub>m</sub> 이하에서의 AZ31 마그네슘합금의 크리이프 변형과 단시간 파단수명예측
강대민,안정오,전성호,구양,심성보,Kang, D.M.,An, J.O.,Jeon, S.H.,Koo, Y.,Sim, S.B. 한국소성가공학회 2008 소성가공 : 한국소성가공학회지 Vol.17 No.8
The initial strain, the applied stress exponent, the activation energy, and rupture time in AZ31 magnesium alloy have been measured in order to predict the deformation mechanism and rupture life of creep over the temperature range of 423-443K. Creep tests were carried out under constant applied stress and temperature, and the lever type tester and automatic temperature controller was used for it, respectively. The experimental results showed that the applied stress exponent was about 9.74, and the activation energy for creep, 113.6KJ/mol was less than that of the self diffusion of Mg alloy including aluminum. From the results, the mechanism for creep deformation seems to be controlled by cross slip at the temperature range of 423-443K. Also the higher the applied stress and temperature, the higher the initial strain. And the rupture time for creep decreased as quadratic function with increasing the initial strain in double logarithmic axis.
구연 / 제 1 회의장 / 위장관 2 : 인두 및 후두 증상이 있는 환자에서 상부식도 이소성 위점막 유무에 따른 보행성 24 시간 식도 산도검사의 비교
김은아(E . A . Kim),강동훈(D . H . Kang),조해석(H . S . Cho),박동균(D . K . Park),김선숙(S . S . Park),박종재(S . S . Park),최덕주(J . J . Choi),박현철(D . J . Park),구양서(H . C . Koo),김주현(J . H . Kim) 대한소화기학회 1999 대한소화기학회 추계학술대회 Vol.1999 No.-
0.5Tm 이하에서의 AZ31 마그네슘합금의 크리이프 변형과 단시간 파단수명예측
강대민(D. M. Kang),안정오(J. O. An),전성호(S. H. Jeon),구양(Y. Koo),심성보(S. B. Sim) 한국소성·가공학회 2008 소성가공 : 한국소성가공학회지 Vol.17 No.8
The initial strain, the applied stress exponent, the activation energy, and rupture time in AZ31 magnesium alloy have been measured in order to predict the deformation mechanism and rupture life of creep over the temperature range of 423- 443K. Creep tests were carried out under constant applied stress and temperature, and the lever type tester and automatic temperature controller was used for it, respectively. The experimental results showed that the applied stress exponent was about 9.74, and the activation energy for creep, 113.6KJ/mol was less than that of the self diffusion of Mg alloy including aluminum. From the results, the mechanism for creep deformation seems to be controlled by cross slip at the temperature range of 423-443K. Also the higher the applied stress and temperature, the higher the initial strain. And the rupture time for creep decreased as quadratic function with increasing the initial strain in double logarithmic axis.