Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression
Metastable β titanium alloys are attracting great interest due to their intricate plastic deformation mechanisms. In this work, a novel metastable β titanium alloy Ti-6Mo-3.5Cr-1Zr is developed by controlling the phase stability. The alloy exhibits a compressive strength of ∼ 1152 MPa with large mal...
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Elsevier
2022-09-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522005615 |
| _version_ | 1828356131737567232 |
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| author | Kai Chen Qunbo Fan Lin Yang Jiahao Yao Shun Xu Wei Lei Yu Gao |
| author_facet | Kai Chen Qunbo Fan Lin Yang Jiahao Yao Shun Xu Wei Lei Yu Gao |
| author_sort | Kai Chen |
| collection | DOAJ |
| description | Metastable β titanium alloys are attracting great interest due to their intricate plastic deformation mechanisms. In this work, a novel metastable β titanium alloy Ti-6Mo-3.5Cr-1Zr is developed by controlling the phase stability. The alloy exhibits a compressive strength of ∼ 1152 MPa with large malleability (∼34 %) during dynamic compressions. The microstructural evolution and adiabatic shearing behavior of the alloy are investigated by applying stop rings to control the compressive strains. Microstructural characterizations and differential scanning calorimetry show that the content of stress-induced ω (SIω) phase increases with the accumulation of strain, resulting in strain hardening of the material. The formation of adiabatic shear band (ASB) is observed in samples with 30% strain, whilst the formation and expansion of ASB are hindered by stress-induced structures. The microstructural evolution along outer edge → transition zone → center of the ASB region corresponds to (β + ω)→(β + α)→(β), which is caused by the temperature increasement in ASB. In addition, the average grain sizes in ASB region are gradually refined under the action of dynamic recrystallization. These results provide insights into the dynamic deformation mechanism and adiabatic shearing behavior of metastable β titanium alloys. |
| first_indexed | 2024-04-14T02:54:23Z |
| format | Article |
| id | doaj.art-2af23a129f0d4328ba9cd5ddba37aa1d |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-14T02:54:23Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
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| series | Materials & Design |
| spelling | doaj.art-2af23a129f0d4328ba9cd5ddba37aa1d2022-12-22T02:16:10ZengElsevierMaterials & Design0264-12752022-09-01221110939Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compressionKai Chen0Qunbo Fan1Lin Yang2Jiahao Yao3Shun Xu4Wei Lei5Yu Gao6National Key Laboratory of Science and Technology on Materials Under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaNational Key Laboratory of Science and Technology on Materials Under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401135, ChinaNational Key Laboratory of Science and Technology on Materials Under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401135, China; Corresponding author.National Key Laboratory of Science and Technology on Materials Under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401135, ChinaNational Key Laboratory of Science and Technology on Materials Under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401135, ChinaNational Key Laboratory of Science and Technology on Materials Under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaNational Key Laboratory of Science and Technology on Materials Under Shock and Impact, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaMetastable β titanium alloys are attracting great interest due to their intricate plastic deformation mechanisms. In this work, a novel metastable β titanium alloy Ti-6Mo-3.5Cr-1Zr is developed by controlling the phase stability. The alloy exhibits a compressive strength of ∼ 1152 MPa with large malleability (∼34 %) during dynamic compressions. The microstructural evolution and adiabatic shearing behavior of the alloy are investigated by applying stop rings to control the compressive strains. Microstructural characterizations and differential scanning calorimetry show that the content of stress-induced ω (SIω) phase increases with the accumulation of strain, resulting in strain hardening of the material. The formation of adiabatic shear band (ASB) is observed in samples with 30% strain, whilst the formation and expansion of ASB are hindered by stress-induced structures. The microstructural evolution along outer edge → transition zone → center of the ASB region corresponds to (β + ω)→(β + α)→(β), which is caused by the temperature increasement in ASB. In addition, the average grain sizes in ASB region are gradually refined under the action of dynamic recrystallization. These results provide insights into the dynamic deformation mechanism and adiabatic shearing behavior of metastable β titanium alloys.http://www.sciencedirect.com/science/article/pii/S0264127522005615Titanium alloyDynamic compressionStress-induced ω phase transformationAdiabatic shear bandMicrostructural evolution |
| spellingShingle | Kai Chen Qunbo Fan Lin Yang Jiahao Yao Shun Xu Wei Lei Yu Gao Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression Materials & Design Titanium alloy Dynamic compression Stress-induced ω phase transformation Adiabatic shear band Microstructural evolution |
| title | Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression |
| title_full | Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression |
| title_fullStr | Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression |
| title_full_unstemmed | Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression |
| title_short | Deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress-induced ω phase transformation during dynamic compression |
| title_sort | deciphering the microstructural evolution and adiabatic shearing behavior of the titanium alloy with stress induced ω phase transformation during dynamic compression |
| topic | Titanium alloy Dynamic compression Stress-induced ω phase transformation Adiabatic shear band Microstructural evolution |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522005615 |
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