Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructure
In this study, the TC21 (Ti–6Al–2Sn–2Zr–3Mo–1Cr–2Nb-0.1Si) alloy with basket-weave microstructure was subjected to subsolvus + aging (910 °C + 550 °C) and supersolvus + aging (1010 °C + 550 °C) treatments to optimize the performance of aircraft engine casings and other high-temperature resistant com...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425016369 |
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| author | L.M. Chen L.R. Xiao Y.F. Xu L.R. Zeng X.J. Zhao S. Zhang C. Liu Z. Fu |
| author_facet | L.M. Chen L.R. Xiao Y.F. Xu L.R. Zeng X.J. Zhao S. Zhang C. Liu Z. Fu |
| author_sort | L.M. Chen |
| collection | DOAJ |
| description | In this study, the TC21 (Ti–6Al–2Sn–2Zr–3Mo–1Cr–2Nb-0.1Si) alloy with basket-weave microstructure was subjected to subsolvus + aging (910 °C + 550 °C) and supersolvus + aging (1010 °C + 550 °C) treatments to optimize the performance of aircraft engine casings and other high-temperature resistant components at service temperatures of 400–600 °C. The relationship between the microstructure and high-temperature creep behavior was investigated. The creep behavior was analyzed using the Arrhenius equation to derive a constitutive model, and the creep mechanisms were determined in conjunction with the microstructural observations. Compared to the as-received and supersolvus + aging samples, subsolvus + aging samples exhibited 2.1 times longer creep life at 600 °C/500 MPa and the lowest steady-state creep rate (1.158 × 10−4/s at 600 °C/500 MPa), primarily attributed to a complete basket-weave structure with thickened lamellar primary α phase (0.8 μm) and nano-scale secondary α precipitates within refined β grains (150–200 μm). Microstructure changes didn't alter the fundamental creep mechanism. At lower temperature of 400–500 °C under 300–500 MPa, low activation energies (56.3–82.9 kJ/mol) indicated oxygen diffusion-dominated creep, while higher temperatures (500–600 °C) yielded elevated activation energies (301–411.9 kJ/mol) due to α/β-Ti self-diffusion. Stress exponent n values increased, ranging 1.5–1.8 (400 °C), 2.2–2.7 (500 °C) and 5.1–6.4 (600 °C), confirming a transition from dislocation slip-diffusion coupling to dislocation climb-dynamic recrystallization dominance. |
| format | Article |
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| institution | Matheson Library |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-6e70a6635ff14a8f9f99f90729c54d152025-07-03T04:39:51ZengElsevierJournal of Materials Research and Technology2238-78542025-07-013727742787Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructureL.M. Chen0L.R. Xiao1Y.F. Xu2L.R. Zeng3X.J. Zhao4S. Zhang5C. Liu6Z. Fu7College of Mechanical and Electrical Engineering, Changsha University, Changsha, Hunan, 410022, PR China; School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaSchool of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, PR China; Key Lab of Nonferrous Materials, Ministry of Education, Central South University, Changsha, Hunan, 410083, PR ChinaCollege of Mechanical and Electrical Engineering, Changsha University, Changsha, Hunan, 410022, PR China; Corresponding author. Hongshan Road No. 98, Kaifu District, Changsha, PR China.Guizhou Aviation Technical Development Co., Ltd, Guiyang, Guizhou, 550081, PR ChinaSchool of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, PR China; Key Lab of Nonferrous Materials, Ministry of Education, Central South University, Changsha, Hunan, 410083, PR China; Corresponding author. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, PR China.College of Mechanical and Electrical Engineering, Changsha University, Changsha, Hunan, 410022, PR ChinaCollege of Mechanical and Electrical Engineering, Changsha University, Changsha, Hunan, 410022, PR ChinaCollege of Mechanical and Electrical Engineering, Changsha University, Changsha, Hunan, 410022, PR ChinaIn this study, the TC21 (Ti–6Al–2Sn–2Zr–3Mo–1Cr–2Nb-0.1Si) alloy with basket-weave microstructure was subjected to subsolvus + aging (910 °C + 550 °C) and supersolvus + aging (1010 °C + 550 °C) treatments to optimize the performance of aircraft engine casings and other high-temperature resistant components at service temperatures of 400–600 °C. The relationship between the microstructure and high-temperature creep behavior was investigated. The creep behavior was analyzed using the Arrhenius equation to derive a constitutive model, and the creep mechanisms were determined in conjunction with the microstructural observations. Compared to the as-received and supersolvus + aging samples, subsolvus + aging samples exhibited 2.1 times longer creep life at 600 °C/500 MPa and the lowest steady-state creep rate (1.158 × 10−4/s at 600 °C/500 MPa), primarily attributed to a complete basket-weave structure with thickened lamellar primary α phase (0.8 μm) and nano-scale secondary α precipitates within refined β grains (150–200 μm). Microstructure changes didn't alter the fundamental creep mechanism. At lower temperature of 400–500 °C under 300–500 MPa, low activation energies (56.3–82.9 kJ/mol) indicated oxygen diffusion-dominated creep, while higher temperatures (500–600 °C) yielded elevated activation energies (301–411.9 kJ/mol) due to α/β-Ti self-diffusion. Stress exponent n values increased, ranging 1.5–1.8 (400 °C), 2.2–2.7 (500 °C) and 5.1–6.4 (600 °C), confirming a transition from dislocation slip-diffusion coupling to dislocation climb-dynamic recrystallization dominance.http://www.sciencedirect.com/science/article/pii/S2238785425016369MicrostructureTC21 alloyCreep behaviorDislocationDynamic recrystallization |
| spellingShingle | L.M. Chen L.R. Xiao Y.F. Xu L.R. Zeng X.J. Zhao S. Zhang C. Liu Z. Fu Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructure Journal of Materials Research and Technology Microstructure TC21 alloy Creep behavior Dislocation Dynamic recrystallization |
| title | Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructure |
| title_full | Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructure |
| title_fullStr | Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructure |
| title_full_unstemmed | Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructure |
| title_short | Effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of TC21 titanium alloy with basket-weave microstructure |
| title_sort | effect of subsolvus and supersolvus solution treatments on the high temperature creep behavior of tc21 titanium alloy with basket weave microstructure |
| topic | Microstructure TC21 alloy Creep behavior Dislocation Dynamic recrystallization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425016369 |
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