Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy
The hot deformation behaviors of a new Ti-6Al-2Nb-2Zr-0.4B titanium alloy in the strain rate range 0.01–10.0 s<sup>−1</sup> and temperature range 850–1060 °C were evaluated using hot compressing testing on a Gleeble-3800 simulator at 60% of deformation degree. The flow stress characteris...
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MDPI AG
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| Online Access: | https://www.mdpi.com/1996-1944/14/9/2456 |
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| author | Zhijun Yang Weixin Yu Shaoting Lang Junyi Wei Guanglong Wang Peng Ding |
| author_facet | Zhijun Yang Weixin Yu Shaoting Lang Junyi Wei Guanglong Wang Peng Ding |
| author_sort | Zhijun Yang |
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| description | The hot deformation behaviors of a new Ti-6Al-2Nb-2Zr-0.4B titanium alloy in the strain rate range 0.01–10.0 s<sup>−1</sup> and temperature range 850–1060 °C were evaluated using hot compressing testing on a Gleeble-3800 simulator at 60% of deformation degree. The flow stress characteristics of the alloy were analyzed according to the true stress–strain curve. The constitutive equation was established to describe the change of deformation temperature and flow stress with strain rate. The thermal deformation activation energy Q was equal to 551.7 kJ/mol. The constitutive equation was <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover><mrow><mi>ε</mi><mo> </mo></mrow><mo>˙</mo></mover><msup><mrow><mrow><mo>=</mo><mi mathvariant="normal">e</mi></mrow></mrow><mrow><mn>54.41</mn></mrow></msup><msup><mrow><mo stretchy="false">[</mo><mrow><mi>sin</mi><mi mathvariant="normal">h</mi><mo> </mo><mo>(</mo></mrow><mrow><mn>0.01</mn><mi>σ</mi><mo>)</mo><mo>]</mo></mrow></mrow><mrow><mn>2.35</mn></mrow></msup><mrow><mi>exp</mi><mo>(</mo></mrow><mo>−</mo><mn>551.7</mn><mrow><mo>/</mo><mi>R</mi><mi>T</mi><mo>)</mo></mrow><mo>.</mo></mrow></semantics></math></inline-formula> On the basis of the dynamic material model and the instability criterion, the processing maps were established at the strain of 0.5. The experimental results revealed that in the (α + β) region deformation, the power dissipation rate reached 53% in the range of 0.01–0.05 s<sup>−1</sup> and temperature range of 920–980 °C, and the deformation mechanism was dynamic recovery. In the β region deformation, the power dissipation rate reached 48% in the range of 0.01–0.1 s<sup>−1</sup> and temperature range of 1010–1040 °C, and the deformation mechanism involved dynamic recovery and dynamic recrystallization. |
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| spelling | doaj.art-49488e679f1e4a2e8d17ff68a3668e052023-11-21T18:54:42ZengMDPI AGMaterials1996-19442021-05-01149245610.3390/ma14092456Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium AlloyZhijun Yang0Weixin Yu1Shaoting Lang2Junyi Wei3Guanglong Wang4Peng Ding5School of Mechanical and Electrical Engineering, Xinxiang University, Xinxiang 453003, ChinaSchool of Mechanical and Electrical Engineering, Xinxiang University, Xinxiang 453003, ChinaSchool of Mechanical and Electrical Engineering, Xinxiang University, Xinxiang 453003, ChinaSchool of Mechanical and Electrical Engineering, Xinxiang University, Xinxiang 453003, ChinaSchool of Mechanical and Electrical Engineering, Xinxiang University, Xinxiang 453003, ChinaSchool of Mechanical and Electrical Engineering, Xinxiang University, Xinxiang 453003, ChinaThe hot deformation behaviors of a new Ti-6Al-2Nb-2Zr-0.4B titanium alloy in the strain rate range 0.01–10.0 s<sup>−1</sup> and temperature range 850–1060 °C were evaluated using hot compressing testing on a Gleeble-3800 simulator at 60% of deformation degree. The flow stress characteristics of the alloy were analyzed according to the true stress–strain curve. The constitutive equation was established to describe the change of deformation temperature and flow stress with strain rate. The thermal deformation activation energy Q was equal to 551.7 kJ/mol. The constitutive equation was <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover><mrow><mi>ε</mi><mo> </mo></mrow><mo>˙</mo></mover><msup><mrow><mrow><mo>=</mo><mi mathvariant="normal">e</mi></mrow></mrow><mrow><mn>54.41</mn></mrow></msup><msup><mrow><mo stretchy="false">[</mo><mrow><mi>sin</mi><mi mathvariant="normal">h</mi><mo> </mo><mo>(</mo></mrow><mrow><mn>0.01</mn><mi>σ</mi><mo>)</mo><mo>]</mo></mrow></mrow><mrow><mn>2.35</mn></mrow></msup><mrow><mi>exp</mi><mo>(</mo></mrow><mo>−</mo><mn>551.7</mn><mrow><mo>/</mo><mi>R</mi><mi>T</mi><mo>)</mo></mrow><mo>.</mo></mrow></semantics></math></inline-formula> On the basis of the dynamic material model and the instability criterion, the processing maps were established at the strain of 0.5. The experimental results revealed that in the (α + β) region deformation, the power dissipation rate reached 53% in the range of 0.01–0.05 s<sup>−1</sup> and temperature range of 920–980 °C, and the deformation mechanism was dynamic recovery. In the β region deformation, the power dissipation rate reached 48% in the range of 0.01–0.1 s<sup>−1</sup> and temperature range of 1010–1040 °C, and the deformation mechanism involved dynamic recovery and dynamic recrystallization.https://www.mdpi.com/1996-1944/14/9/2456titanium alloythermal deformationconstructive equationprocessing maps |
| spellingShingle | Zhijun Yang Weixin Yu Shaoting Lang Junyi Wei Guanglong Wang Peng Ding Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy Materials titanium alloy thermal deformation constructive equation processing maps |
| title | Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy |
| title_full | Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy |
| title_fullStr | Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy |
| title_full_unstemmed | Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy |
| title_short | Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy |
| title_sort | hot deformation behavior and processing maps of a new ti 6al 2nb 2zr 0 4b titanium alloy |
| topic | titanium alloy thermal deformation constructive equation processing maps |
| url | https://www.mdpi.com/1996-1944/14/9/2456 |
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