Effects of Post Heat Treatment on the Mechanical Properties of Cold-Rolled Ti/Cu Clad Sheet
Abstract
:1. Introduction
2. Experimental Method
3. Results and Discussion
4. Conclusions
- Titanium clads were successfully fabricated and the bond strength at the interface was improved through heat treatment. The average tensile strength of the heat-treated clad was 353 MPa while maintaining excellent tensile and yield strength, and the elongation was improved by more than two times from 21% to max. 53%.
- In the titanium clad, Ti and Cu components diffused into each other across the Ti/Cu interface during the post heat treatment, and diffusion bonding occurred at the interface. In addition, the thickness of the diffusion layer increased with an increase in the heat-treatment time, and much stronger interface bonding of the Ti/Cu clad occurred.
- Hardness at the interface increased gradually with increasing heat-treatment time. The tensile strength of the clad decreased slightly after the heat treatment, whereas the elongation increased significantly. This can greatly improve the forming processability of the Ti-Cu dissimilar clad plate.
Author Contributions
Funding
Conflicts of Interest
References
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Unit (nm) Specimens | Ti Distance | Cu Distance |
---|---|---|
0.5 h | 219 ± 2.5 | 151 ± 4.2 |
1 h | 260 ± 10 | 178 ± 3.7 |
2 h | 329 ± 5.2 | 233 ± 6.4 |
4 h | 453 ± 8.1 | 343 ± 6.1 |
Properties Specimens | YS (MPa) | UTS (MPa) | El (%) |
---|---|---|---|
Ti | 310 | 344 | 20 |
Cu | 254 | 277 | 36 |
As-rolled | 455 ± 14 | 507 ± 3 | 21.4 ± 2.9 |
450 °C 0.5 h | 270 ± 13 | 357 ± 1 | 53.3 ± 2.7 |
450 °C 1 h | 272 ± 1 | 360 ± 1 | 47.8 ± 1.3 |
450 °C 2 h | 254 ± 6 | 346 ± 1 | 50.4 ± 1.2 |
450 °C 4 h | 266 ± 7 | 352 ± 2 | 47.9 ± 1.1 |
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Youn, C.-S.; Lee, D.-G. Effects of Post Heat Treatment on the Mechanical Properties of Cold-Rolled Ti/Cu Clad Sheet. Metals 2020, 10, 1672. https://doi.org/10.3390/met10121672
Youn C-S, Lee D-G. Effects of Post Heat Treatment on the Mechanical Properties of Cold-Rolled Ti/Cu Clad Sheet. Metals. 2020; 10(12):1672. https://doi.org/10.3390/met10121672
Chicago/Turabian StyleYoun, Chang-Suk, and Dong-Geun Lee. 2020. "Effects of Post Heat Treatment on the Mechanical Properties of Cold-Rolled Ti/Cu Clad Sheet" Metals 10, no. 12: 1672. https://doi.org/10.3390/met10121672