Effect of aging temperature on microstructure and mechanical properties of TB15 titanium alloy

doi:10.13251/j.issn.0254-6051.2021.10.015

Abstract

Abstract: Effect of aging temperature on the microstructure and mechanical properties of TB15 titanium alloy was studied by means of OM, SEM and tensile testing. The results show that with the aging temperature increasing from 520 ℃ to 540 ℃, the tensile strength and yield strength of the TB15 titanium alloy first increase and then decrease, and the highest tensile strength and yield strength can be obtained at 530 ℃ of aging treatment. The plasticity of the alloy is low after aging treatment, which variation is opposite to the strengths. As the increase of aging temperature, the fracture toughness of the alloy increases gradually. After aging at different temperatures, a large number of secondary α lamellar phases are precipitated in the solid solution treated TB15 titanium alloy, and the equiaxed β microstructure transforms into lamellar α and β transformed microstructure.

Key words: TB15 titanium alloy, aging treatment, mechanical properties, microstructure

CLC Number:

TG146.2

Li Mingxiang, Hu Shengshuang, Chen Suming, Xiao Jun, Zhang Yingyun, Zhang Bingxian, Xu Yong. Effect of aging temperature on microstructure and mechanical properties of TB15 titanium alloy[J]. Heat Treatment of Metals, 2021, 46(10): 92-95.

References

[1]《航空制造工程手册》总编委会. 航空制造工程手册: 热处理[M]. 北京: 航空工业出版社, 1993.
[2]尉文超, 李云坤, 薛彦军, 等. 热处理工艺对TC4钛合金冲击磨损性能的影响[J]. 金属热处理, 2020, 45(6): 7-11.
Yu Wenchao, Li Yunkun, Xue Yanjun, et al. Influence of heat treatment on impact wear resistance of TC4 titanium alloy[J]. Heat Treatment of Metals, 2020, 45(6): 7-11.
[3]夏思海, 武美萍, 马毅青, 等. TiC含量对TC4合金激光熔覆层组织和性能的影响[J]. 金属热处理, 2020, 45(6): 212-215.
Xia Sihai, Wu Meiping, Ma Yiqing, et al. Effect of TiC content on microstructure and properties of laser clad layer on TC4 alloy[J]. Heat Treatment of Metals, 2020, 45(6): 212-215.
[4]陶春虎, 刘庆瑔, 曹春晓, 等. 航空用钛合金的失效及预防[M]. 北京: 国防工业出版社, 2002.
[5]赵小龙, 王小翔, 王新. 变型量和热处理对BTi-6554钛合金冷轧板材组织和性能的影响[C]//中国有色金属工业协会钛锆铪分会2015年会论文集, 2015:335-339.
[6]Yang Yulan, Wang Weiqi, Li Fengli, et al. The effect of aluminum equivalent and molybdenum equivalent on the mechanical properties of high strength and high toughness titanium alloys[J]. Materials Science Forum, 2009, 618-619: 169-172.
[7]李成林, 于洋, 惠松骁, 等. Ti6554钛合金的TTT曲线测定[J]. 中国有色金属学报, 2010, 20(S1): 560-564.
Li Chenglin, Yu Yang, Hui Songxiao, et al. Determination of TTT curve of Ti-6554 titanium alloy[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(S1): 560-564.
[8]于洋, 李成林, 惠松骁, 等. Ti6554钛合金的晶粒长大动力学[J]. 中国有色金属学报, 2010, 20(S1): 161-166.
Yu Yang, Li Chenglin, Hui Songxiao, et al. Grain growth dynamics of Ti-6554 titanium alloy[J]. The Chinese Journal of Nonferrous Metals,2010, 20(S1): 161-166.
[9]李峰丽, 王韦琪, 羊玉兰, 等. ø250 mm BTi6554钛合金棒材组织与性能研究[J]. 金属加工(热加工), 2015(9): 85-86.
[10]Wang H B, Wang S S, Gao P Y, et al. Microstructure and mechanical properties of a novel near-α titanium alloy Ti6.0Al4.5Cr1.5Mn[J]. Materials Science and Engineering A, 2016, 672: 170-174.
[11]常辉, 曾卫东, 罗媛媛, 等. 近β型钛合金Ti-B19时效过程中的相变及显微组织[J]. 稀有金属材料与工程, 2006, 35(10): 1589-1592.
Chang Hui, Zeng Weidong, Luo Yuanyuan, et al. Phase transformation and microstructure evolution in near β Ti-B19 titaniumalloy during aging treatment[J]. Rare Metal Materials and Engineering, 2006, 35(10): 1589-1592.
[12]刘睿, 惠松骁, 叶文君, 等. 退火温度对TC4钛合金动态断裂韧性的影响[J]. 稀有金属材料与工程, 2011, 40(10): 1799-1803.
Liu Rui, Hui Songxiao, Ye Wenjun, et al. Effects of annealing temperature on dynamic fracture toughness for TC4 titanium alloy[J]. Rare Metal Materials and Engineering, 2011, 40(10): 1799-1803.
[13]Niinomi M, Kobayashi T, Sasaki N. Toughness and microstructural factors of Ti-6Al-4V alloy[J]. Materials Science and Engincering, 1986, 100: 45-55.
[14]Niinomi M, Kobayashi T. Fracture characteristics analysis related to the microstructures in titanium alloys[J]. Materials Science and Engineering A, 1996, 213(1): 16-24.
[15]张旺峰, 曹春晓, 李兴无, 等. β热处理TA15钛合金对力学性能的影响规律[J]. 稀有金属材料与工程, 2004, 33(7): 768-770.
Zhang Wangfeng, Cao Chunxiao, Li Xingwu, et al. Effect of β heat treatment on mechanical properties of TA15 titanium alloy[J]. Rare Metal Materials and Engineering, 2004, 33(7): 768-770.