Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples
Abstract
:1. Introduction
2. Experimental
2.1. Materials and SLM Process
2.2. T2 Heat Treatment Process
2.3. Mechanical Tests
2.4. Microstructure Characterization
3. Results and Discussion
3.1. Effects of T2 Heat Treatment on the Densifications of the SLMed Samples
3.2. Effects of T2 Heat Treatment on the Hardness of the SLMed Samples
3.3. Effects of T2 Heat Treatment on the Tensile of the SLMed Samples
3.4. Effects of T2 Heat Treatment on the Bending of the SLMed Samples
3.5. Effects of T2 Heat Treatment on the Microstructure of the SLMed Samples
4. Conclusions
- (1)
- Compared with the SLMed samples, the densification is not very different. T2 heat treatment has no obvious influence on the densification of the SLMed samples.
- (2)
- After T2 heat treatment, the Brinell hardness, tensile strength, and bending strength of the SLMed samples decrease about 50%. The plasticity and fracture deflection clearly increases, and the anisotropy decreases.
- (3)
- The T2 heat treatment promotes the homogenization of elements, and the precipitates in the molten pool boundary dissolves in the matrix. The samples undergo recrystallization, Si particle size grows and tends to form spherical. The internal stress of the samples is effectively released.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Wang, L.; Sun, J.; Zhu, X.; Cheng, L.; Shi, Y.; Guo, L.; Yan, B. Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples. Materials 2018, 11, 66. https://doi.org/10.3390/ma11010066
Wang L, Sun J, Zhu X, Cheng L, Shi Y, Guo L, Yan B. Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples. Materials. 2018; 11(1):66. https://doi.org/10.3390/ma11010066
Chicago/Turabian StyleWang, Lianfeng, Jing Sun, Xiaogang Zhu, Lingyu Cheng, Yun Shi, Lijie Guo, and Biao Yan. 2018. "Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples" Materials 11, no. 1: 66. https://doi.org/10.3390/ma11010066
APA StyleWang, L., Sun, J., Zhu, X., Cheng, L., Shi, Y., Guo, L., & Yan, B. (2018). Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples. Materials, 11(1), 66. https://doi.org/10.3390/ma11010066