EBSD Analysis of Hot Deformation Behavior of Oxide-Doped Molybdenum Alloys
Abstract
:1. Introduction
2. Experimental Section
2.1. Material Preparation
2.2. Experimental Procedures
3. Results
3.1. True Stress–True Strain Curve
3.2. Microstructural Evolution
3.3. Constitutive Equations
3.4. Strain Compensation
3.5. EBSD Analysis
3.5.1. Texture Analysis
3.5.2. IPF Map
3.5.3. Texture Composition Analysis
3.5.4. Local Orientation Difference Analysis
4. Discussion
5. Conclusions
- (1)
- The rheological stress of the two molybdenum alloys increased with decreasing deformation temperature or increasing strain rate, and the effect of the molybdenum alloy doped with ZrO2 in improving thermal deformation resistance was better than that of the alloy doped with Al2O3.
- (2)
- The constitutive equations and activation energy diagrams of the two molybdenum alloys were established. The molybdenum alloy doped with ZrO2 (403.917 kJ/mol) had lower activation energy than that doped with Al2O3 (440.314 kJ/mol).
- (3)
- The textures of the two molybdenum alloys during thermal deformation were mainly {100} texture and {111} texture. The texture of the molybdenum alloy doped with ZrO2 had a higher intensity than that of the molybdenum alloy doped with the Al2O3. The intensity of {100} texture first increased and then decreased when the temperature rose, while the change law of {111} texture exhibited the opposite, with the inflection point around the recrystallization temperature.
- (4)
- The grain size of the Mo–1.5wt% ZrO2 alloy increased with increasing temperature. At a low strain rate and high temperature, the dislocation density decreased due to the occurrence of recrystallization. The sub–grains merged to form large–angle grain boundaries, and so the percentage of large–angle grain boundaries showed an upward trend.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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α | n | Q | lnA | ||||
---|---|---|---|---|---|---|---|
A1 | 0.00471 | B1 | 26.04856 | C1 | 1010.97279 | D1 | 77.98867 |
A2 | 0.00473 | B2 | −168.03811 | C2 | −6720.96435 | D2 | −554.8083 |
A3 | −0.0402 | B3 | 750.61243 | C3 | 28,972.90935 | D3 | 2433.7486 |
A4 | 0.13176 | B4 | −1699.7891 | C4 | −62,073.73045 | D4 | −5270.35991 |
A5 | −0.17848 | B5 | 1842.79951 | C5 | 64,177.7886 | D5 | 5496.05483 |
A6 | 0.08595 | B6 | −757.49024 | C6 | −25,393.15594 | D6 | −2191.82851 |
α | n | Q | lnA | ||||
---|---|---|---|---|---|---|---|
A1 | 0.00445 | B1 | 23.77219 | C1 | 876.85884 | D1 | 81.77307 |
A2 | 0.000601724 | B2 | −129.19618 | C2 | −5202.64628 | D2 | −651.05548 |
A3 | −0.01617 | B3 | 538.00483 | C3 | 21,796.84917 | D3 | 3030.92649 |
A4 | 0.07302 | B4 | −1181.86117 | C4 | −46,742.41783 | D4 | −6892.99011 |
A5 | −0.11378 | B5 | 1268.49926 | C5 | 49,320.99448 | D5 | 7505.93055 |
A6 | 0.06009 | B6 | −519.82125 | C6 | −20,110.67745 | D6 | −3117.12693 |
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Wang, B.; Zhou, Y.; Xu, L.; Yang, D.; Li, X.; Wei, S. EBSD Analysis of Hot Deformation Behavior of Oxide-Doped Molybdenum Alloys. Metals 2023, 13, 238. https://doi.org/10.3390/met13020238
Wang B, Zhou Y, Xu L, Yang D, Li X, Wei S. EBSD Analysis of Hot Deformation Behavior of Oxide-Doped Molybdenum Alloys. Metals. 2023; 13(2):238. https://doi.org/10.3390/met13020238
Chicago/Turabian StyleWang, Bin, Yucheng Zhou, Liujie Xu, Dan Yang, Xiuqing Li, and Shizhong Wei. 2023. "EBSD Analysis of Hot Deformation Behavior of Oxide-Doped Molybdenum Alloys" Metals 13, no. 2: 238. https://doi.org/10.3390/met13020238