Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgings
Titanium alloys are widely used in the manufacture of aero-engine blisks due to their low density, high strength, and excellent performance at medium and high temperatures. However, there are few studies on dynamic mechanical properties and adiabatic shear sensitivities of titanium alloy forgings fo...
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| Format: | Article |
| Language: | zho |
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Journal of Aeronautical Materials
2023-10-01
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| Series: | Journal of Aeronautical Materials |
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| Online Access: | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000105 |
| _version_ | 1797663523951607808 |
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| author | CHEN Yuhao MIN Xiaohua ZHANG Haiyang DAI Jincai ZHOU Yiqun |
| author_facet | CHEN Yuhao MIN Xiaohua ZHANG Haiyang DAI Jincai ZHOU Yiqun |
| author_sort | CHEN Yuhao |
| collection | DOAJ |
| description | Titanium alloys are widely used in the manufacture of aero-engine blisks due to their low density, high strength, and excellent performance at medium and high temperatures. However, there are few studies on dynamic mechanical properties and adiabatic shear sensitivities of titanium alloy forgings for blisks. In this work, the dynamic mechanical properties of forged TC17 and TC4 alloys at high strain rates were examined by SHPB apparatus, and OM, SEM, EBSD were used to study the adiabatic shear behaviors of the two kinds of alloy. As the strain rate increases, the strength of both alloys increases, thus exhibiting the strain rate strengthening effect. At the same strain rate, TC4 alloy exhibits higher plastic strain and dynamic absorbed energy than those of TC17 alloy. TC17 alloy obtains a basket-weave microstructure after β forging, in which lath α-phases and residual β phases form more phase interfaces. ASBs tend to form at phase interfaces, which lead to a tendency for ASBs to bifurcate during propagating processes. TC4 alloy obtains a bimodal microstructure after α+β forging, and equiaxed primary α-phases show good ductility, which improve the dynamic plastic deformation ability. The regular arrangement of secondary α-phases results in fewer phase interfaces, leading to the difficulty in bifurcation of ASBs during propagating processes. Under dynamic interrupted compression conditions, ASBs in TC17 alloy are occurred earlier, and the localization energy of ASBs is low. Therefore, TC17 alloy has higher adiabatic shear sensitivity, and adiabatic shear sensitivities of both alloys increase with the increase of strain rates. |
| first_indexed | 2024-03-11T19:15:55Z |
| format | Article |
| id | doaj.art-283dd65b3caf4cfdba6c5047945d58a0 |
| institution | Directory Open Access Journal |
| issn | 1005-5053 |
| language | zho |
| last_indexed | 2024-03-11T19:15:55Z |
| publishDate | 2023-10-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-283dd65b3caf4cfdba6c5047945d58a02023-10-09T08:50:06ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50532023-10-01435394910.11868/j.issn.1005-5053.2023.000105a2023-0105Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgingsCHEN Yuhao0MIN Xiaohua1ZHANG Haiyang2DAI Jincai3ZHOU Yiqun4School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, ChinaSchool of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, ChinaKey Laboratory of Impact Dynamics on Aero Engine, AECC Shenyang Engine Design and Research Institute, Shenyang 110042, ChinaSchool of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, ChinaKey Laboratory of Impact Dynamics on Aero Engine, AECC Shenyang Engine Design and Research Institute, Shenyang 110042, ChinaTitanium alloys are widely used in the manufacture of aero-engine blisks due to their low density, high strength, and excellent performance at medium and high temperatures. However, there are few studies on dynamic mechanical properties and adiabatic shear sensitivities of titanium alloy forgings for blisks. In this work, the dynamic mechanical properties of forged TC17 and TC4 alloys at high strain rates were examined by SHPB apparatus, and OM, SEM, EBSD were used to study the adiabatic shear behaviors of the two kinds of alloy. As the strain rate increases, the strength of both alloys increases, thus exhibiting the strain rate strengthening effect. At the same strain rate, TC4 alloy exhibits higher plastic strain and dynamic absorbed energy than those of TC17 alloy. TC17 alloy obtains a basket-weave microstructure after β forging, in which lath α-phases and residual β phases form more phase interfaces. ASBs tend to form at phase interfaces, which lead to a tendency for ASBs to bifurcate during propagating processes. TC4 alloy obtains a bimodal microstructure after α+β forging, and equiaxed primary α-phases show good ductility, which improve the dynamic plastic deformation ability. The regular arrangement of secondary α-phases results in fewer phase interfaces, leading to the difficulty in bifurcation of ASBs during propagating processes. Under dynamic interrupted compression conditions, ASBs in TC17 alloy are occurred earlier, and the localization energy of ASBs is low. Therefore, TC17 alloy has higher adiabatic shear sensitivity, and adiabatic shear sensitivities of both alloys increase with the increase of strain rates.http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000105bliskα+β titanium alloyhigh strain ratedynamic absorbed energyadiabatic shear band |
| spellingShingle | CHEN Yuhao MIN Xiaohua ZHANG Haiyang DAI Jincai ZHOU Yiqun Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgings Journal of Aeronautical Materials blisk α+β titanium alloy high strain rate dynamic absorbed energy adiabatic shear band |
| title | Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgings |
| title_full | Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgings |
| title_fullStr | Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgings |
| title_full_unstemmed | Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgings |
| title_short | Dynamic responses and adiabatic shear behaviors of TC17 and TC4 alloy forgings |
| title_sort | dynamic responses and adiabatic shear behaviors of tc17 and tc4 alloy forgings |
| topic | blisk α+β titanium alloy high strain rate dynamic absorbed energy adiabatic shear band |
| url | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000105 |
| work_keys_str_mv | AT chenyuhao dynamicresponsesandadiabaticshearbehaviorsoftc17andtc4alloyforgings AT minxiaohua dynamicresponsesandadiabaticshearbehaviorsoftc17andtc4alloyforgings AT zhanghaiyang dynamicresponsesandadiabaticshearbehaviorsoftc17andtc4alloyforgings AT daijincai dynamicresponsesandadiabaticshearbehaviorsoftc17andtc4alloyforgings AT zhouyiqun dynamicresponsesandadiabaticshearbehaviorsoftc17andtc4alloyforgings |