Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formula
Aiming at improving the strength-plasticity match in the as-cast state of the most widely used Ti-6Al-4V the present work designs Ti-Al-V-Zr alloys on the basis of the dual-cluster formula of Ti-6Al-4V, α-{[Al-Ti12]（AlTi2）}12 +β-{[Al-Ti14]（V2Ti）}5： first, the alloys are more biased towards α-Ti by d...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Aeronautical Materials
2023-04-01
|
| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2022.000071 |
| _version_ | 1797853413722030080 |
|---|---|
| author | LIU Yuhan ZHU Zhihao ZHANG Shuang DONG Chuang |
| author_facet | LIU Yuhan ZHU Zhihao ZHANG Shuang DONG Chuang |
| author_sort | LIU Yuhan |
| collection | DOAJ |
| description | Aiming at improving the strength-plasticity match in the as-cast state of the most widely used Ti-6Al-4V the present work designs Ti-Al-V-Zr alloys on the basis of the dual-cluster formula of Ti-6Al-4V, α-{[Al-Ti12]（AlTi2）}12 +β-{[Al-Ti14]（V2Ti）}5： first, the alloys are more biased towards α-Ti by decreasing the number of β unit to 2, then, the stability of β-Ti is improved by increasing the number of V atoms in β unit to 3, and finally, Zr （x=1-5） replaces Ti in the β unit. Finally α-{[Al-Ti12]（AlTi2）}15-β-{[AlTi14-xZrx]V3）}2 is obtained, Ti-（6.64-6.82）Al-（2.42-2.35）V-（1.44-7.02）Zr （mass fraction,%） alloy is designed. The alloy ingots are prepared by melting in a non-consuming vacuum are furnace, and the alloy bars are suction-cast in copper mould. The results show that the alloys are all in α' martensite structure, showing morphologies changing from acicular Widmannstatten structure at lower Zr contents to net-basket structure at higher Zr contents. Among the designed alloys, Ti-6.64Al-2.35V-7.02Zr （x=5） with a net-basket structure, has the best mechanical properties： yield strength of 806 MPa, tensile strength of 963 MPa, and elongation of 5.9%, which are respectively 23%, 19% and 51% higher than those of Ti-6Al-4V alloy under the same preparation condition. In particular, the specific strength and specific hardness are 217kN•m/kg and 0.71 GPa•cm3/g, which are 18% and 10% higher than Ti-6Al-4V alloy. |
| first_indexed | 2024-04-09T19:50:16Z |
| format | Article |
| id | doaj.art-cd30805ae64c4415b0c54ab7564e931a |
| institution | Directory Open Access Journal |
| issn | 1005-5053 |
| language | zho |
| last_indexed | 2024-04-09T19:50:16Z |
| publishDate | 2023-04-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-cd30805ae64c4415b0c54ab7564e931a2023-04-03T09:47:48ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50532023-04-01432425010.11868/j.issn.1005-5053.2022.0000712022-0071Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formulaLIU Yuhan0ZHU Zhihao1ZHANG Shuang2DONG Chuang3Key Laboratory of Materials Modification, Ministry of Education, University of Technology, Dalian 116024，Liaoning，ChinaKey Laboratory of Materials Modification, Ministry of Education, University of Technology, Dalian 116024，Liaoning，ChinaSchool of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028，Liaoning，ChinaKey Laboratory of Materials Modification, Ministry of Education, University of Technology, Dalian 116024，Liaoning，ChinaAiming at improving the strength-plasticity match in the as-cast state of the most widely used Ti-6Al-4V the present work designs Ti-Al-V-Zr alloys on the basis of the dual-cluster formula of Ti-6Al-4V, α-{[Al-Ti12]（AlTi2）}12 +β-{[Al-Ti14]（V2Ti）}5： first, the alloys are more biased towards α-Ti by decreasing the number of β unit to 2, then, the stability of β-Ti is improved by increasing the number of V atoms in β unit to 3, and finally, Zr （x=1-5） replaces Ti in the β unit. Finally α-{[Al-Ti12]（AlTi2）}15-β-{[AlTi14-xZrx]V3）}2 is obtained, Ti-（6.64-6.82）Al-（2.42-2.35）V-（1.44-7.02）Zr （mass fraction,%） alloy is designed. The alloy ingots are prepared by melting in a non-consuming vacuum are furnace, and the alloy bars are suction-cast in copper mould. The results show that the alloys are all in α' martensite structure, showing morphologies changing from acicular Widmannstatten structure at lower Zr contents to net-basket structure at higher Zr contents. Among the designed alloys, Ti-6.64Al-2.35V-7.02Zr （x=5） with a net-basket structure, has the best mechanical properties： yield strength of 806 MPa, tensile strength of 963 MPa, and elongation of 5.9%, which are respectively 23%, 19% and 51% higher than those of Ti-6Al-4V alloy under the same preparation condition. In particular, the specific strength and specific hardness are 217kN•m/kg and 0.71 GPa•cm3/g, which are 18% and 10% higher than Ti-6Al-4V alloy.http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2022.000071titanium alloyti-al-v-zrcomposition designcluster formulamechanical properties |
| spellingShingle | LIU Yuhan ZHU Zhihao ZHANG Shuang DONG Chuang Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formula Journal of Aeronautical Materials titanium alloy ti-al-v-zr composition design cluster formula mechanical properties |
| title | Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formula |
| title_full | Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formula |
| title_fullStr | Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formula |
| title_full_unstemmed | Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formula |
| title_short | Microstructure and mechanical properties of Ti-Al-V-Zr cast alloys with different Zr contents based on Ti-6Al-4V cluster formula |
| title_sort | microstructure and mechanical properties of ti al v zr cast alloys with different zr contents based on ti 6al 4v cluster formula |
| topic | titanium alloy ti-al-v-zr composition design cluster formula mechanical properties |
| url | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2022.000071 |
| work_keys_str_mv | AT liuyuhan microstructureandmechanicalpropertiesoftialvzrcastalloyswithdifferentzrcontentsbasedonti6al4vclusterformula AT zhuzhihao microstructureandmechanicalpropertiesoftialvzrcastalloyswithdifferentzrcontentsbasedonti6al4vclusterformula AT zhangshuang microstructureandmechanicalpropertiesoftialvzrcastalloyswithdifferentzrcontentsbasedonti6al4vclusterformula AT dongchuang microstructureandmechanicalpropertiesoftialvzrcastalloyswithdifferentzrcontentsbasedonti6al4vclusterformula |