Effect of double annealing process on mechanical properties and fracture morphology of TC21 titanium alloy

doi:10.13251/j.issn.0254-6051.2020.05.020

Abstract

Abstract: The effect of double annealing on the microstructure and mechanical properties of TC21 titanium alloy was studied by means of OM, SEM, tensile test, impact test, and fracture toughness test. The results show that when the first annealing temperature keeps constant, the bulk α phase is easier to form with the increase of the second annealing temperature. When the second annealing temperature keeps constant, the probability of forming bulk α phase decreases with the increase of the first annealing temperature. The reduction of area of the TC21 alloy is the most sensitive to different double annealing processes. The specimens fabricated under double annealing process of 900 ℃×2 h+500 ℃×4 h have bent large stripe α phase and have the maximum impact absorbed. The specimens fabricated under double annealing process of 950 ℃×2 h+590 ℃×4 h can absorb the most energy during crack propagation and have the highest fracture toughness.

Key words: double annealing process, TC21 titanium alloy, microstructure, mechanical properties, fracture morphology

CLC Number:

TG156

Hu Shengshuang, Meng Xiaochuan, Wang Qing, Li Binbo, Liang Xiao, Wang Wenbo. Effect of double annealing process on mechanical properties and fracture morphology of TC21 titanium alloy[J]. Heat Treatment of Metals, 2020, 45(5): 110-114.

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]. 2版. 北京: 航空工业出版社, 2010.
[2]彭湃, 王庆娟, 李辉, 等. 退火温度对TC2钛合金织构与冲压性能的影响[J]. 金属热处理, 2017, 42(1): 72-75.
Peng Pai, Wang Qingjuan, Li Hui, et al. Effect of annealing temperature on texture and stamping property of TC2 titanium alloy[J]. Heat Treatment of Metals, 2017, 42(1): 72-75.
[3]冯亮, 曲恒磊, 赵永庆, 等. TC21合金的高温变形行为[J]. 航空材料学报, 2004, 24(4): 11-13.
Feng Liang, Qu Henglei, Zhao Yongqing, et al. High temperature deformation behavior of TC21 alloy[J]. Journal of Aeronautical Materials, 2004, 24(4): 11-13.
[4]陈伟. TC21钛合金损伤容限性能研究[D]. 南京: 南京航空航天大学, 2008.
Chen Wei. Research on the damage tolerance of TC21 titanium alloy[D]. Nanjing: Nanjing University of Aeronautic and Astronautics, 2008.
[5]朱深亮, 董洪波, 张华贵, 等. 三重热处理对TC21合金超塑性变形后组织的影响[J]. 稀有金属材料与工程, 2016, 45(10): 2659-2663.
Zhu Shenliang, Dong Hongbo, Zhang Huagui, et al. Effects of triple heat treatment on superplastic tensile microstructure of TC21 alloy[J]. Rare Metal Materials and Engineering, 2016, 45(10): 2659-2663.
[6]邹忠波, 董洪波, 朱深亮, 等. 三重热处理温度对TC21钛合金显微组织的影响[J]. 特种铸造及有色合金, 2016, 36(4): 438-441.
Zou Zhongbo, Dong Hongbo, Zhu Shenliang, et al. Effects of triple heat treatment temperature on microstructure of TC21 titanium alloy[J]. Special Casting and Nonferrous Alloys, 2016, 36(4): 438-441.
[7]杨健, 陈静, 张强. 激光近净成形TC21钛合金的组织与性能[J]. 金属热处理, 2015, 40(3): 48-52.
Yang Jian, Chen Jing, Zhang Qiang. Microstructure and properties of laser near net formed TC21titanium alloy[J]. Heat Treatment of Metals, 2015, 40(3): 48-52.
[8]高玉魁. 喷丸强化对TC21高强度钛合金疲劳性能的影响[J]. 金属热处理, 2010, 35(8): 30-32.
Gao Yukui. Influence of shot peening on fatigue property of TC21 titanium alloy[J]. Heat Treatment of Metals, 2010, 35(8): 30-32.
[9]熊熠, 肖国强. 不同热处理工艺对TC21钛合金组织及力学性能的影响[J]. 铸造技术, 2015, 36(3): 638-640.
Xiong Yi, Xiao Guoqiang. Effects of heat treatment of microstructure and mechanical properties of TC21 titanium alloy[J]. Foundry Technology, 2015, 36(3): 638-640.
[10]史春玲, 王浩军, 石晓辉, 等. 双重退火制度对TC21钛合金断裂韧性的影响[J]. 钛工业进展, 2013, 30(1): 12-15.
Shi Chunling, Wang Haojun, Shi Xiaohui, et al. The effect of duplex annealing heat treatment on fracture toughness of TC21 titanium alloy[J]. Titanium Industry Progress, 2013, 30(1): 12-15.
[11]凌志伟, 董洪波, 王志录, 等. 超塑成形及热处理对TC21合金组织演变的影响[J]. 特种铸造及有色合金, 2013, 33(4): 381-383.
Ling Zhiwei, Dong Hongbo, Wang Zhilu, et al. Effect of superplastic deformation and heat treatment on microstructure evolution of TC21 alloy[J]. Special Casting and Nonferrous Alloys, 2013, 33(4): 381-383.
[12]党薇, 薛祥义, 李金山, 等. TC21合金片层组织特征对其断裂韧性的影响[J]. 中国有色金属学报, 2010, 20(S1): 16-20.
Dang Wei, Xue Xiangyi, Li Jinshan, et al. Influence of lamellar microstructure feature on fracture toughness of TC21 alloy[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(S1): 16-20.

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