Abstract
The microstructure and mechanical properties of the TB8 titanium alloy were controlled by a secondary processing technology of solution-equal channel angular pressing (ECAP)-aging treatment, which combined strong plastic deformation with heat treatment. The effects of ECAP and heat treatment on the microstructure and properties of the titanium alloy were systematically investigated by optical microscopy (OM), scanning electron microscopy (SEM), hardness tests, and tensile property analysis. The results indicate that the metallographic structure without ECAP treatment is mainly equiaxed β-phase, while that after ECAP treatment is equiaxed β-phase with grain fragmentation, slip bands, and new small grains. After 850 °C solution-ECAP-520 °C aging treatment, the titanium alloy has the smallest grain size, while the directionality of tissue growth along the ECAP direction is the most apparent. Under the same solution-aging conditions, the hardness of the titanium alloy increases from 431.5 to 531.2 HV compared to that without ECAP treatment, i e, increases by 23.11%, and the tensile strength increases from 1 045.30 to 1 176.25 MPa, i e, increases by 12.5%.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Yang Q Y, Ma M, Tan Y B, et al. Microstructure and Texture Evolution of TB8 Titanium Alloys during Hot Compression[J]. Rare Metals, 2021, 40(10): 2 917–2 926
Sun J F, Zhang Z W, Jiang M L, et al. Microstructure Evolution and Their Effects on the Mechanical Properties of TB8 Titanium Alloy[J]. Journal of Alloys and Compounds, 2016, 663: 769–774
Tang Bo, Tang B, Han F B, et al. Influence of Strain Rate on Stress Induced Martensitic Transformation in β Solution Treated TB8 Alloy[J]. Journal of Alloys and Compounds, 2013, 565: 1–5
Liu D, Liu D X, Guagliano M, et al. Contribution of Ultrasonic Surface Rolling Process to the Fatigue Properties of TB8 Alloy with Body-centered Cubic Structure[J]. Journal of Materials Science & Technology, 2021, 61(2): 63–74
Shi Q, Tse Y Y, Higginson R L. Microstructure Evolution and Microhardness Analysis of Metastable Beta Titanium Alloy Ti-15V-3Cr-3Al-3Sn Consolidated Using Equal-Channel Angular Pressing from Machining Chips[J]. Journal of Materials Engineering and Performance, 2020, 29(6): 4 142–4 153
Grishkov V, Kopylov V, Lotkov A, et al. Effect of Warm Equal Channel Angular Pressing on the Structure and Mechanical Properties of Ti0.16Pd0.14Fe (wt%) Alloy[J]. Reviews on Advanced Materials Science, 2019, 58(1): 22–31
Hamid A, Mostafa K. Improved Properties of Ti-6Al-4V by Combining Isothermal Equal-channel Angular Processing and Hot-extrusion[J]. Materials Science and Technology, 2019, 35(14): 1 735–1 741
Zhang W W, Yang Q, Tan Y, et al. Simulation and Experimental Study of Dynamical Recrystallization Kinetics of TB8 Titanium Alloys[J]. Materials, 2020, 13(19): 4 429–4 429
Wang L R, Ma C L, Zhao Y Q, et al. Effect of β Heat Treatment on Phase Transformations of TC21 during Rolling[J]. Materials Science and Technology, 2016, 32(7): 635–640
Wang J N, Yang J, Wang Y. Grain Refinement of a Ti-47Al-8Nb-2Cr Alloy through Heat Treatments[J]. Scripta Materialia, 2004, 52(4): 329–334
Wang Y H, Li X, Alexandrov IV, et al. Impact of Equal Channel Angular Pressing on Mechanical Behavior and Corrosion Resistance of Hot-Rolled Ti-2Fe-0.1B Alloy.[J]. Materials (Basel, Switzerland), 2020, 13(22): 5 117
Ssk A, Rs B, Dmi C, et al. Influence of Heat Treatment on Mechanical and Micro Structural Properties of Titanium Alloys for Enhanced Applications[J]. Materials Today: Proceedings, 2017, 4(8): 8 111–8 116
Afifi M A, Wang Y C, Pereira P, et al. Mechanical Properties of an Al-Zn-Mg Alloy Processed by ECAP and Heat Treatments[J]. Journal of Alloys and Compounds, 2018, 769: 631–639
Naizabekov A, Lezhnev S; Panin E, et al. Effect of Combined Rolling–ECAP on Ultrafine-Grained Structure and Properties in 6063 Al Alloy[J]. Journal of Materials Engineering and Performance, 2019, 28(1): 200–210
Tong Y X, Hu K P, Chen F, et al. Multiple-stage Transformation Behavior of Ti49.2Ni50.8 Alloy with Different Initial Microstructure Processed by Equal Channel Angular Pressing[J]. Intermetallics, 2017, 85: 163–169
Cardoso K R, Travessa D N, Botta W J, et al. High Strength AA7050 Al Alloy Processed by ECAP: Microstructure and Mechanical Properties[J]. Materials Science & Engineering A, 2011, 528(18): 5 804–5 811
Tański T, Snopiński P, Borek W, et al. Structure and Properties of AlMg Alloy after Combination of ECAP and Post-ECAP Ageing[J]. Archives of Civil and Mechanical Engineering, 2016, 16(3): 325–334
Ahmadi S, Sedighi M. Effects of Solution Treatment and Sheath on Mechanical Properties of Al7075 Processed by ECAP[J]. Journal of Mechanical Science and Technology, 2017, 31(9): 4 189–4 194
Bartha K, Veverková A, Strásk J, et al. Effect of the Severe Plastic Deformation by ECAP on Microstructure and Phase Transformations in Ti-15Mo Alloy[J]. Materials Today Communications, 2020, 22: 100 811
Hall E O. The Deformation and Ageing of Mild Steel: III Discussion of Results[J]. Proceedings of the Physical Society. Section B, 1951, 64(9): 747–753
Author information
Authors and Affiliations
Corresponding author
Additional information
Conflict of interest
All authors declare that there are no competing interests.
Funded by the Key R&D Plan of Zhenjiang in 2018 (No. GY2018021)
Rights and permissions
About this article
Cite this article
Chen, F., Xu, X., Liu, Y. et al. Effect of Solution-ECAP-Aging Treatment on the Microstructure and Properties of TB8 Titanium Alloy. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 38, 669–676 (2023). https://doi.org/10.1007/s11595-023-2744-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11595-023-2744-y