Effect of solution and aging treatment on microstructure and mechanical properties of Ti-5.43Al-3.11Mo-1.41V titanium alloy

doi:10.13251/j.issn.0254-6051.2021.07.029

Abstract

Abstract: Effect of solution temperature on microstructure, element distribution, hardness and compression properties of the BT14 titanium alloy (Ti-5.43Al-3.11Mo-1.41V) under different temperature solution and aging treatment was studied. The results show that after solid solution below the β phase transition temperature, the volume fraction of primary α phase in the alloy decreases as the solution temperature increases, both the Al content in primary α phase and matrix phase (α′, α″, metastable β phase) increase, while the Mo and V contents decrease, meanwhile, the microhardness increases. After solution treatment at 890, 940, 990 ℃, respectively, and then all aging at 540 ℃ for 6 h, the matrix phase of the alloy decomposes into fine α+β phases, which result in the microhardness increasing, moreover, the microhardness and compressive yield strength increase as the solution temperature increases.

Key words: BT14 titanium alloy, solution treatment, aging treatment, microstructure, mechanical properties

CLC Number:

TG146.23

Chen Hao, Hou Yuehong, Zhang Xi, Wei Ya, Yang Yi, Wu Songquan, Li Geping, Liang Enquan, Huang Aijun. Effect of solution and aging treatment on microstructure and mechanical properties of Ti-5.43Al-3.11Mo-1.41V titanium alloy[J]. Heat Treatment of Metals, 2021, 46(7): 155-159.

References

[1] Lütjering G, Williams J C. Titanium[M]. Beijing: Metallurgical Industry Press, 2011: 2-11.
[2] 霍东兴, 梁精龙, 李慧, 等. 钛合金研究及应用进展[J]. 铸造技术, 2016, 37(10): 2065-2066.
Huo Dongxing, Liang Jinglong, Li Hui, et al. Progress of research and application of titanium alloy[J]. Foundry Technology, 2016, 37(10): 2065-2066.
[3] 张海龙. BT14钛合金板材研制[D]. 西安: 西安建筑科技大学, 2013.
[4] 王清, 赖静, 孙东立, 等. BT14钛合金固溶时效后的显微组织与力学性能[J]. 材料热处理学报, 2007, 28(S1): 82-85.
Wang Qing, Lai Jing, Sun Dongli, et al. Microstructures and mechanical properties of BT14 titanium alloy treated by solution and aging[J]. Transactions of Materials and Heat Treatment, 2007, 28(S1): 82-85.
[5] Zong Y Y, Shan D B, Lu Y. Microstructural evolution of a Ti-4.5Al-3Mo-1V alloy during hot working[J]. Journal of Materialsscience, 2006, 41(12): 3753-3760.
[6] 郭伟, 王启, 宋德军, 等. 冷却速率对BT14钛合金组织及性能的影响[J]. 材料热处理学报, 2018, 39(10): 23-28.
Guo Wei, Wang Qi, Song Dejun, et al. Effect of cooling rate on microstructure and properties of BT14 titanium alloy[J]. Transactions of Materials and Heat Treatment, 2018, 39(10): 23-28.
[7] 张岷, 杨义, 李长富, 等. Ti-4.4Al-3.8Mo合金在淬火时的亚稳相变及其对硬度的影响[J]. 材料研究学报, 2008, 22(1): 68-71.
Zhang Min, Yang Yi, Li Changfu, et al. Metastable phase transformations in Ti-4.4Al-3.8Mo alloy and its influence on the hardness[J]. Chinese Journal of Materials Research, 2008, 22(1): 68-71.
[8] Wang Y, Kou H, Chang H, et al. Influence of solution temperature on phase transformation of TC21 alloy[J]. Materials Science and Engineering A, 2009, 508(1/2): 76-82.
[9] 谢文芳, 郭雷明, 张淼斐, 等. 固溶时效温度对Ti-6Al-4V-0.5Si合金组织性能的影响[J]. 特种铸造及有色合金, 2020, 40(4): 449-452.
Xie Wenfang, Guo Leiming, Zhang Miaofei, et al. Effect of solution aging temperature on the microstructure and properties of Ti-6Al-4V-0.5Si alloy[J]. Special Casting and Nonferrous Alloys, 2020, 40(4): 449-452.
[10] Wang K, Li M, Liu Q. Evolution mechanisms of the primary α and β phases during α/β deformation of an α/β titanium alloy TC8[J]. Materials Characterization, 2016, 120: 115-123.
[11] Lee K, Song J. Estimation methods for strain-life fatigue properties from hardness[J]. International Jouenal of Fatigue, 2006, 28(4): 386-400.
[12] 卢凯凯, 段启辉, 周立鹏, 等. 固溶处理对TC11钛合金环件组织和硬度的影响[J]. 金属热处理, 2018, 43(8): 148-151.
Lu Kaikai, Duan Qihui, Zhou Lipeng, et al. Effect of solution heat treatment on microstructure and hardness of TC11 titanium alloy ring[J]. Heat Treatment of Metals, 2018, 43(8): 148-151.
[13] 杨海瑛, 刘全明. 高强Ti-26合金室温压缩性能和显微组织演变研究[J]. 稀有金属材料与工程, 2018, 47(4): 1232-1237.
Yang Haiying, Liu Quanming. Study on room temperature compressibility and microstructure evolution of high strength Ti-26 alloy[J]. Rare Metal Materials and Engineering, 2018, 47(4): 1232-1237.
[14] Chong Yan, Bhattacharjee Tilak, Park Myeong-Heom, et al. Factors determining room temperature mechanical properties of bimodal microstructures in Ti-6Al-4V alloy[J]. Materials Science and Engineering A, 2018, 730: 217-222.
[15] 冯亮, 曲恒磊, 赵永庆, 等. 固溶温度对TC21钛合金组织和力学性能的影响[C]//全国钛及钛合金学术交流会, 2005.
Feng Liang, Qu Henglei, Zhao Yongqing, et al. Effect of solution temperature on microstructure and mechanical properties of TC21 titanium alloy[C]//National Titanium and Titanium Alloy Academic Exchange Conference, 2005.