http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
PEO 코팅에 의한 AZ31 마그네슘 합금의 Creep 특성에 관한 연구
강대민(Dae-Min Kang),안정오(Jung-O An) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
The apparent activation energy, the applied stress exponent, and rupture life have been measured from creep experiments over the range of 200°C to 220°C and the applied stress range of 64MPa to 94MPa. The materials were used AZ31 magnesium alloys treated by plasma electrolytic oxidation of 10㎛ at surface to investigate the its influence on creep behavior, and creep tests were carried out under constant applied stress and temperature. The experimental results showed that the surface treatment the higher activation energy and stress exponent. According to this study, appropriate rupture time, and .investigate the creep characteristic of AZ31 magnesium alloy by PEO 10pm coating.
ZA31 마그네슘 합금의 크리이프 강도에 PEO 표면처리의 영향
강대민(Dae-Min Kang),안정오(Jung-O An),강민철(Min-Cheol Kang) 한국소성가공학회 2009 마그네슘 심포지엄 Vol.2009 No.11
The apparent activation energy, the applied stress exponent, and rupture life have been measured from creep experiments over the range of 200℃ to 220℃ and the applied stress range of 64㎫ to 94㎫. The materials were used AZ31 magnesium alloys treated by plasma electrolytic oxidation of 10, 20 and 40㎛ at surface to investigate the its influence on creep behavior, and creep tests were carried out under constant applied stress and temperature. The experimental results showed that the dipper the thickness of surface treatment the higher the activation energy and stress exponent. And the higher temperature and applied stress, the lower stress exponent and activation energy, respectively. Also the dipper the thickness of surface treatment the longer creep rupture time.
0.5Tm 이하에서의 AZ31 마그네슘 합금 크리이프 파단수명 예측
강대민(Dae-Min Kang),안정오(Jung-O An) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
Magnesium alloys have given high attention to the industry of light-weigh as automobile and electronics with aluminium, titanium and composite alloys due to their high strength, low specific density and good damping characteristics. But the magnesium contained structures under high temperature have the problems related to creep deformation and rupture life, which is a reason of developing the new material against creep deformation to use them safely. The purpose of this study is to predict the creep deformation mechanism and rupture time of AZ31 magnesium alloy. For this, creep tests of AZ31 magnesium alloy were done under constant creep load and temperature with the equipment including automatic temperature controller with acquisition computer. The apparent activation energy Qc, the applied stress exponent n and rupture life have been determined over the temperature range below 0.5Tm and stress range of 109~141㎫, respectively, in order to investigate the creep behavior. AZ31 Magnesium alloy identify the activation energy for creep deformation and the stress dependence to creep rate at below 0.5Tm, and then investigate the mechanism for creep deformation and creep rupture life of AZ31 Magnesium alloy