Effect of Heat Treatment on the Cyclic Deforming Behavior of As-Extruded ZA81M Magnesium Alloy
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials and Conditions of Heat Treatment
2.2. Experimental Procedures
3. Results and Discussion
3.1. Microstructure and Mechanical Properties after T4 and T6 Heat Treatment
3.2. Cyclic Stress Response
3.3. Hysteresis Loops
3.4. Fatigue Life
3.5. Fracture
4. Conclusions
- (1)
- In fine second-phase precipitates after aging treatment, the tensile yield strength of T6-treated specimens increased, the elongation decreased, and the ultimate tensile strength remained constant compared with T4-treated specimens.
- (2)
- The T4- and T6-treated specimens showed cyclic hardening under strain amplitudes of 0.4% and 0.8%, respectively, with the T4 specimens showing a higher hardening rate but the stress amplitude always being higher for the T6 -treated specimens.
- (3)
- The T6-treated specimens had a higher total strain energy density and a shorter fatigue life at a strain amplitude of 0.4% and a lower total strain energy density and longer fatigue life at a strain amplitude of 0.8% compared to the T4-treated specimens.
- (4)
- All fatigue cracks in the T4 and T6 ZA81M alloys were initiated in the second phase or along the grain boundary perpendicular to the loading direction and propagated initially along the grain boundary and then along the slip band until they encountered the second-phase.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Zn | Al | Cu | Mn | Mg |
---|---|---|---|---|
7.7 | 0.9 | 0.4 | 0.5 | Bal. |
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Luo, T.; Feng, J.; Liu, C.; Wang, C.; Li, Y.; Feng, X.; Zheng, C.; Huang, Q.; Li, W.; Yang, Y. Effect of Heat Treatment on the Cyclic Deforming Behavior of As-Extruded ZA81M Magnesium Alloy. Metals 2022, 12, 146. https://doi.org/10.3390/met12010146
Luo T, Feng J, Liu C, Wang C, Li Y, Feng X, Zheng C, Huang Q, Li W, Yang Y. Effect of Heat Treatment on the Cyclic Deforming Behavior of As-Extruded ZA81M Magnesium Alloy. Metals. 2022; 12(1):146. https://doi.org/10.3390/met12010146
Chicago/Turabian StyleLuo, Tianjiao, Jianguang Feng, Chenye Liu, Cong Wang, Yingju Li, Xiaohui Feng, Ce Zheng, Qiuyan Huang, Weirong Li, and Yuansheng Yang. 2022. "Effect of Heat Treatment on the Cyclic Deforming Behavior of As-Extruded ZA81M Magnesium Alloy" Metals 12, no. 1: 146. https://doi.org/10.3390/met12010146