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Investigation of the compressive creep behavior of AZ91D magnesium alloy |
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| Affiliation: | 1. Bone and Muscle Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam;2. Department of Rheumatology, People''s Hospital 115, Ho Chi Minh City, Vietnam;3. Center of Bone Disease, Lausanne University Hospital, Lausanne, Switzerland;4. Bone Biology Division, Garvan Institute of Medical Research, Sydney, Australia;5. School of Public Health and Community Medicine, UNSW, Australia, Sydney;6. University of Technology Sydney (UTS), NSW, Australia |
| Abstract: | The creep resistance of AZ91D alloy has been studied in uniaxial compression tests at temperature ranges from 275 °C to 325 °C. The initial microstructure of the alloy consists of α phase and β phase precipitated in the grain boundary. The minimum creep rate dependence on applied stress and the temperature is also analyzed in detail. We find that the stress exponent n is close to the theoretical values (3 or 5) and the activation energy Q for creep varies from 121 kJ/mol to 171 kJ/mol. Creep could be controlled by high-temperature climb and cross-slip of dislocation at different temperatures. |
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