Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applications
The influence of duplex aging on the microstructural and mechanical behavior of Ti–25Nb–10Ta–1Zr-0.2Fe alloy was investigated. The first step of duplex aging (DA) treatments was carried out at 300 °C or 400 °C for 20min and 1 h, followed by the second step aged at 550 °C for 20min-24 h.A small amoun...
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Elsevier
2022-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422004811 |
| _version_ | 1818495200797917184 |
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| author | Yanfei Xu Huiqun Liu Sha Zhang Hanqing Xiong |
| author_facet | Yanfei Xu Huiqun Liu Sha Zhang Hanqing Xiong |
| author_sort | Yanfei Xu |
| collection | DOAJ |
| description | The influence of duplex aging on the microstructural and mechanical behavior of Ti–25Nb–10Ta–1Zr-0.2Fe alloy was investigated. The first step of duplex aging (DA) treatments was carried out at 300 °C or 400 °C for 20min and 1 h, followed by the second step aged at 550 °C for 20min-24 h.A small amount of athermal ω (ωath) formed in the β matrix after solution treatment and water quenching. During single aging (SA) at 550 °C, upon slowly heating process, the ωath→isothermal ω (ωiso)→isothermal α'' (α''iso) might occur. Subsequently, the α''iso dissolved rapidly and transformed into α phase at the early stage of aging, resulting in a fine distribution of α precipitates in the β matrix. During DA treatments, the fine ωiso and α''iso were observed in the first stage aging at 300 °C/400 °C, then the metastable ωiso and α''iso decomposed into α phase at higher temperature of 550 °C. Besides fine α laths, ladder-shaped α clusters with large size were observed after DA. There was a single-peak in the hardness curve of SA, and the peak hardness was associated with the uniform distribution of fine plate-like α phase. After DA treatments, the alloy showed stronger age-hardening and displayed obvious double-peak precipitation hardening. The first hardness peak was the result of the dense ωiso nano-particles formed in the first aging stage, while the second one could be mainly attributed to these large ladder-shaped α clusters in the second aging stage. Compared with SA, the balance between high strength and low modulus could be improved by an appropriate DA treatment. |
| first_indexed | 2024-12-10T18:17:20Z |
| format | Article |
| id | doaj.art-68184ae364c7492282a620a50bd08e80 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-10T18:17:20Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-68184ae364c7492282a620a50bd08e802022-12-22T01:38:18ZengElsevierJournal of Materials Research and Technology2238-78542022-05-011828702884Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applicationsYanfei Xu0Huiqun Liu1Sha Zhang2Hanqing Xiong3College of Mechanical & Electrical Engineering, Changsha University, Changsha, 410022, China; Corresponding author.School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, ChinaCollege of Mechanical & Electrical Engineering, Changsha University, Changsha, 410022, ChinaCollege of Mechanical & Electrical Engineering, Changsha University, Changsha, 410022, ChinaThe influence of duplex aging on the microstructural and mechanical behavior of Ti–25Nb–10Ta–1Zr-0.2Fe alloy was investigated. The first step of duplex aging (DA) treatments was carried out at 300 °C or 400 °C for 20min and 1 h, followed by the second step aged at 550 °C for 20min-24 h.A small amount of athermal ω (ωath) formed in the β matrix after solution treatment and water quenching. During single aging (SA) at 550 °C, upon slowly heating process, the ωath→isothermal ω (ωiso)→isothermal α'' (α''iso) might occur. Subsequently, the α''iso dissolved rapidly and transformed into α phase at the early stage of aging, resulting in a fine distribution of α precipitates in the β matrix. During DA treatments, the fine ωiso and α''iso were observed in the first stage aging at 300 °C/400 °C, then the metastable ωiso and α''iso decomposed into α phase at higher temperature of 550 °C. Besides fine α laths, ladder-shaped α clusters with large size were observed after DA. There was a single-peak in the hardness curve of SA, and the peak hardness was associated with the uniform distribution of fine plate-like α phase. After DA treatments, the alloy showed stronger age-hardening and displayed obvious double-peak precipitation hardening. The first hardness peak was the result of the dense ωiso nano-particles formed in the first aging stage, while the second one could be mainly attributed to these large ladder-shaped α clusters in the second aging stage. Compared with SA, the balance between high strength and low modulus could be improved by an appropriate DA treatment.http://www.sciencedirect.com/science/article/pii/S2238785422004811β-Ti alloyDuplex agingMicrostructural evolutionLadder-shaped αMechanical properties |
| spellingShingle | Yanfei Xu Huiqun Liu Sha Zhang Hanqing Xiong Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applications Journal of Materials Research and Technology β-Ti alloy Duplex aging Microstructural evolution Ladder-shaped α Mechanical properties |
| title | Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applications |
| title_full | Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applications |
| title_fullStr | Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applications |
| title_full_unstemmed | Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applications |
| title_short | Effect of duplex aging on microstructural and mechanical behavior of a new β-Ti alloy for biomedical applications |
| title_sort | effect of duplex aging on microstructural and mechanical behavior of a new β ti alloy for biomedical applications |
| topic | β-Ti alloy Duplex aging Microstructural evolution Ladder-shaped α Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422004811 |
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