Microstructural Characteristics and Subsequent Soften Mechanical Response in Transverse Direction of Wrought AZ31 with Elevated Compression Temperature
Abstract
:1. Introduction
2. Experimental
2.1. Experimental Material
2.2. Experimental Method
3. Result
3.1. Dynamic Mechanics Response
3.2. Microstructure Characteristic
4. Discussion
4.1. Effect of Temperature on Microstructure Evolution
4.2. Effect of Temperature on Dynamic Compressive Behavior
5. Conclusions
- With the temperature elevated from 20 to 250 °C, the curve is gradually converted from a sigmoidal curve to an approximate concave-down curve. As a result of the thermal soften effect, the critical plastic strain is increased from 0.12 to 0.14. Additionally, the peak stress is decreased from 398.61 to 204.16 MPa.
- During the dynamic deformation with an elevated temperature, tension twins, contraction twins and double twins are gradually decreased. Even the contraction twins and double twins disappear at 150 °C. In addition, the refinement grains are initially nucleate at 150 °C and grow at 250 °C.
- According to the combined CRSS and SF analysis, tension twinning is the preferential and main deformation mechanism of the wrought AZ31-TD alloy due to the impact loading perpendicular to the c-axis at 25 °C. The deformation mechanism of non-basal slip and tension twinning simultaneously exist and compete with each other at 150 °C. The DRX and non-basal slip are largely activated and enhanced at 250 °C, which is induced by tension twinning.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Al | Mn | Zn | Fe | Si | Be | Cu | Mg |
---|---|---|---|---|---|---|---|
3.19 | 0.334 | 0.81 | 0.005 | 0.02 | 0.01 | 0.005 | Bal. |
Mechanism Mode | CRSS (MPa) | ||
---|---|---|---|
20 °C | 150 °C | 250 °C | |
basal slip | 5 | 4 | 3 |
prismatic slip | 90 | 60 | 40 |
pyramidal <c + a> | 110 | 65 | 40 |
tension twinning | 30 | 32 | 40 |
contraction twinning | 200 | 180 | ≥130 |
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Yang, M.; Zhang, F.; Yu, W.; Bai, Y.; Liu, Z. Microstructural Characteristics and Subsequent Soften Mechanical Response in Transverse Direction of Wrought AZ31 with Elevated Compression Temperature. Materials 2021, 14, 4055. https://doi.org/10.3390/ma14144055
Yang M, Zhang F, Yu W, Bai Y, Liu Z. Microstructural Characteristics and Subsequent Soften Mechanical Response in Transverse Direction of Wrought AZ31 with Elevated Compression Temperature. Materials. 2021; 14(14):4055. https://doi.org/10.3390/ma14144055
Chicago/Turabian StyleYang, Mengmeng, Feng Zhang, Wei Yu, Yikui Bai, and Zheng Liu. 2021. "Microstructural Characteristics and Subsequent Soften Mechanical Response in Transverse Direction of Wrought AZ31 with Elevated Compression Temperature" Materials 14, no. 14: 4055. https://doi.org/10.3390/ma14144055