Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition
This study investigated the influence of Fe content on the microstructure and mechanical properties of Ti–6Al–4V(TC4) + 25Ti alloys prepared by low-energy-density direct energy deposition (DED) technology. With the incorporation of the Fe elements, the <i>α</i>-Ti phases exhibited signif...
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MDPI AG
2024-02-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/14/2/198 |
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| author | Zijian He Wanwan Yang Cheng Liu Xiao Wei Jiangwei Wang |
| author_facet | Zijian He Wanwan Yang Cheng Liu Xiao Wei Jiangwei Wang |
| author_sort | Zijian He |
| collection | DOAJ |
| description | This study investigated the influence of Fe content on the microstructure and mechanical properties of Ti–6Al–4V(TC4) + 25Ti alloys prepared by low-energy-density direct energy deposition (DED) technology. With the incorporation of the Fe elements, the <i>α</i>-Ti phases exhibited significant changes in size and morphology, while the numerous <i>β</i>-Ti phases and some triclinic-Ti precipitates were retained. With the refinement of the <i>α</i>-Ti phase, retainment of the <i>β</i>-Ti phase and the presence of triclinic-Ti precipitates, the mechanical properties of DED samples can be significantly improved compared with DED TC4 alloys. The room-temperature mechanical property tests showed that the ultimate tensile strength (UTS) of 3Fe + TC4 + 25Ti achieved 1298.64 ± 5.26 MPa with an elongation of 4.82% ± 0.20%, and the maximum elongation of 1Fe + TC4 + 25Ti reached 10.82% ± 0.82% with a UTS of 1076.95 ± 11.69 MPa. The strengthening mechanism of DED Ti-Al-V-Fe alloys were further discussed, providing new insights into the microstructure control and the composition design of additive manufacturing of Ti alloys. |
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| id | doaj.art-10da7ffa238047a9b89a2ba0ae38ef97 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-07T22:21:27Z |
| publishDate | 2024-02-01 |
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| spelling | doaj.art-10da7ffa238047a9b89a2ba0ae38ef972024-02-23T15:27:20ZengMDPI AGMetals2075-47012024-02-0114219810.3390/met14020198Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy DepositionZijian He0Wanwan Yang1Cheng Liu2Xiao Wei3Jiangwei Wang4Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaCenter of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaThis study investigated the influence of Fe content on the microstructure and mechanical properties of Ti–6Al–4V(TC4) + 25Ti alloys prepared by low-energy-density direct energy deposition (DED) technology. With the incorporation of the Fe elements, the <i>α</i>-Ti phases exhibited significant changes in size and morphology, while the numerous <i>β</i>-Ti phases and some triclinic-Ti precipitates were retained. With the refinement of the <i>α</i>-Ti phase, retainment of the <i>β</i>-Ti phase and the presence of triclinic-Ti precipitates, the mechanical properties of DED samples can be significantly improved compared with DED TC4 alloys. The room-temperature mechanical property tests showed that the ultimate tensile strength (UTS) of 3Fe + TC4 + 25Ti achieved 1298.64 ± 5.26 MPa with an elongation of 4.82% ± 0.20%, and the maximum elongation of 1Fe + TC4 + 25Ti reached 10.82% ± 0.82% with a UTS of 1076.95 ± 11.69 MPa. The strengthening mechanism of DED Ti-Al-V-Fe alloys were further discussed, providing new insights into the microstructure control and the composition design of additive manufacturing of Ti alloys.https://www.mdpi.com/2075-4701/14/2/198direct energy depositionTi-Al-V-Fe alloy<i>α</i>/<i>β</i>-Ti phaseprecipitatemechanical properties |
| spellingShingle | Zijian He Wanwan Yang Cheng Liu Xiao Wei Jiangwei Wang Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition Metals direct energy deposition Ti-Al-V-Fe alloy <i>α</i>/<i>β</i>-Ti phase precipitate mechanical properties |
| title | Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition |
| title_full | Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition |
| title_fullStr | Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition |
| title_full_unstemmed | Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition |
| title_short | Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition |
| title_sort | effects of fe contents on the microstructure and precipitate of ti al v alloys prepared by direct energy deposition |
| topic | direct energy deposition Ti-Al-V-Fe alloy <i>α</i>/<i>β</i>-Ti phase precipitate mechanical properties |
| url | https://www.mdpi.com/2075-4701/14/2/198 |
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