Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Composition Design of Ti-6Al-xCr Alloys
3.2. Micro-Structure and Mechanical Properties of Ti-6Al-10.9Cr Alloy
4. Discussion
4.1. Pseudo-Spinodal Mechanism
4.2. Strengthening Mechanism of the Aged Ti-6Al-xCr Alloys
4.3. Fracture Analysis
4.4. Alloy Comparisons Based on Raw Materials Costs and Properties
4.5. Study Limitations and Potential Applications
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Composition | α-Phase Fraction, (%) | β-Phase Fraction, (%) | Thickness of α Phase, h (μm) | Hardness (kg/mm2) | Calculated Yield Strength (MPa) | Experimental Yield Strength (MPa) | Yield Strength Error (%) |
---|---|---|---|---|---|---|---|
Ti-6Al | 100 | 0 | ---- | 369 ± 3.4 | ---- | 1024 | ---- |
Ti-6Al-1.8Cr | 96.31 | 3.69 | 0.523 ± 0.017 | 363 ± 0.9 | 1033 | 1007 | 2.6 |
Ti-6Al-3.5Cr | 91.04 | 8.96 | 0.245 ± 0.012 | 437 ± 6.8 | 1108 | 1212 | 8.6 |
Ti-6Al-5.8Cr | 82.86 | 17.14 | 0.131 ± 0.011 | 438 ± 4.5 | 1191 | 1215 | 2 |
Ti-6Al-8.2Cr | 74.09 | 25.91 | 0.038 ± 0.004 | 483 ± 2.6 | 1436 | 1340 | 7.2 |
Ti-6Al-10.9Cr | 64.77 | 35.23 | 0.026 ± 0.005 | 518 ± 1.5 | 1499 | 1437 | 4.3 |
Ti-6Al-12.4Cr | 59.85 | 40.15 | 0.095 ± 0.008 | 481 ± 5.2 | 1215 | 1334 | 8.9 |
Ti-6Al-14.2Cr | 54.29 | 45.71 | 0.135 ± 0.012 | 477 ± 6.4 | 1138 | 1323 | 14 |
Ti-6Al-19.6Cr | 34.32 | 65.68 | 0.057 ± 0.007 | 392 ± 13.8 | 1179 | 1087 | 8.5 |
Ti-Based Alloy | Tensile Yield Strength (MPa) | Ultimate Tensile Strength (MPa) | Tensile Elongation (%) |
---|---|---|---|
Casted Ti-6Al-10.9Cr | 1437 | 1465 | 2.1 |
PM Ti-5Al-5Mo-5V-3Cr | 1170–1295 | 1252–1386 | 7.3–9.0 |
LPBFed Ti-12Mo-6Zr-2Fe | 1026 | -- | 12.7 |
Casted Ti-4Al–2Fe-1Mn | -- | 1266 | 2.2 |
PM Ti-5Al-3Mo-2Fe | 1303 | 1422 | 8.5 |
Casted Ti-4Mo-3Cr-1Fe | 870 | 1092 | 41 |
Alloy | Raw Materials Cost | Properties | |||
---|---|---|---|---|---|
Elastic Modulus (GPa) | Tensile Yield Strength (MPa) | Ultimate Tensile Strength (MPa) | Tensile Elongation (%) | ||
Ti-6Al-10.9Cr | 0.92 | 108 | 1437 | 1465 | 2.1 |
Ti-6Al-4V | 2.17 | 124 | 1123 | 1242 | 5.2 |
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Ding, C.; Liu, C.; Zhang, L.; Wu, D.; Liu, L. Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD. Materials 2021, 14, 2910. https://doi.org/10.3390/ma14112910
Ding C, Liu C, Zhang L, Wu D, Liu L. Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD. Materials. 2021; 14(11):2910. https://doi.org/10.3390/ma14112910
Chicago/Turabian StyleDing, Chaoyi, Chun Liu, Ligang Zhang, Di Wu, and Libin Liu. 2021. "Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD" Materials 14, no. 11: 2910. https://doi.org/10.3390/ma14112910