Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature
Abstract
:1. Introduction
2. Experimental Procedures
3. Results and Discussion
3.1. Microstructure Evolution
3.2. Phase Fraction
3.3. Mechanical Properties
3.4. Discussion
3.4.1. Strength Variation after Cold Rolling
β × 10−3/rad | τi/MPa | ΔσT/Mpa | Δσc/Mpa | ||||||
---|---|---|---|---|---|---|---|---|---|
0% | 30% | 50% | 0% | 30% | 50% | 0% → 30% | 30% → 50% | 0% → 30% | 30% → 50% |
7.1 | 11.1 | 13.3 | 130.1 | 203.0 | 243.8 | 233.4 | 109.9 | 195.2 | 155.5 |
3.4.2. Strength Variation after Solid Solution
β × 10−3/rad | τi/MPa | ΔσT/MPa | Δσc/MPa | ||||||
---|---|---|---|---|---|---|---|---|---|
0% | 30% | 50% | 0% | 30% | 50% | 0% → 30% | 30% → 50% | 0% → 30% | 30% → 50% |
7.3 | 9.7 | 7.5 | 134.3 | 176.8 | 137.2 | 146.2 | −131.4 | 166.8 | −30.5 |
4. Conclusions
- (1)
- Following the increase of cold rolling reduction, the yield strength and ultimate tensile strength of GH4169 superalloy sheet were substantially increased, however, they were increased then decreased following solid solution.
- (2)
- The main reasons for yield strength changes of GH4169 superalloy are texture and work hardening, followed by the grain refinement and precipitation of δ phase. When the rolling reduction was below 30%, the influence of δ phase was greater than grain refinement and the opposite happen when the rolling reduction was larger than 50%.
- (3)
- The precipitation of δ phase promotes the improvement of yield strength and the relationship between the fraction of δ phase and the improvement of yield strength satisfies the following equation: σδ = 15.9Wδ + 59.7.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Zhang, S.-H.; Ye, N.-Y.; Cheng, M.; Song, H.-W.; Zhou, H.-W.; Wang, P.-B. Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature. Metals 2016, 6, 1. https://doi.org/10.3390/met6010001
Zhang S-H, Ye N-Y, Cheng M, Song H-W, Zhou H-W, Wang P-B. Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature. Metals. 2016; 6(1):1. https://doi.org/10.3390/met6010001
Chicago/Turabian StyleZhang, Shi-Hong, Neng-Yong Ye, Ming Cheng, Hong-Wu Song, Hong-Wei Zhou, and Ping-Bo Wang. 2016. "Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature" Metals 6, no. 1: 1. https://doi.org/10.3390/met6010001