Abstract
The influences of temperature on the tensile properties and especially high-cycle fatigue behaviors of ZK30 magnesium alloy are investigated. The results show that the fatigue strengths are 87.5, 67.5 and 62.5 MPa at room temperature, 100 and 140 & DEG;C, respectively. In order to evaluate the fatigue life, considering the temperature and loading conditions, a comprehensive 2-parameter model based on the dislocation pile-up model has been proposed. This model could predict the fatigue performance in the testing temperature range by using the fatigue performance data at several temperatures. Furthermore, at a constant stress amplitude, a critical testing temperature exists, where an optimal fatigue life can be found for the present magnesium alloy. This model provides a new clue for evaluating the optimum service temperature of the high-temperature materials.
Citation
Recommended citation: Z.K. Xu, L.X. Huang, R. Liu, et al., High-cycle fatigue properties and life prediction of ZK30 magnesium alloy at room and elevated temperatures, J. Mater. Eng. Perform. 33 (2024) 10062–10070.