Two-pass hot compression deformation and softening behavior of commercially pure titanium TA1

doi:10.13251/j.issn.0254-6051.2022.04.012

Abstract

Abstract: Commercially pure titanium TA1 was subjected to one-pass and two-pass hot compression experiments on Gleeble-3500 thermal simulator with deformation temperature of 650-850 ℃, the pass interval time of 1-60 s, and the deformation rate of 10 s^-1. The static and dynamic softening behaviors of the commercially pure titanium TA1 during the one-pass and two-pass hot compression were studied. The microstructure evolution of the commercially pure titanium TA1 under different deformation conditions was studied by optical microscope. The results show that the hardening and softening behaviors of the commercially pure titanium TA1 is obvious during both the one-pass and the two-pass hot compression deformation. Before the peak stress, it is work hardening, and after the peak stress, it is work softening. Finally, the dynamic softening and work hardening reach the dynamic equilibrium. The static softening occurs in the interval time. The static softening rate increases with the increase of interval time as well as the temperature. The recrystallization between passes becomes more sufficient, and the grains grow up obviously after the second pass deformation with the increase of interval time and temperature. When complete recrystallization occurs, the softening rate reaches the maximum. During the hot compression deformation, dynamic softening occurs. Dynamic recrystallization is dominated at 650 ℃ and 750 ℃ and dynamic recovery at 850 ℃.

Key words: commercially pure titanium TA1, double-stage hot compression, softening rate, static softening, dynamic softening

CLC Number:

TG146.2

Wang Qingjuan, Tian Yunfei, Gao Beite, Shi Jiamin, Wu Huan, Cai Jun. Two-pass hot compression deformation and softening behavior of commercially pure titanium TA1[J]. Heat Treatment of Metals, 2022, 47(4): 75-79.

References

[1]Ghasemi E, Zarei-Hanzaki A, Farabi E, et al. Flow softening and dynamic recrystallization behavior of BT9 titanium alloy: A study using process map development[J]. Journal of Alloys and Compounds, 2017, 695: 1706-1718.
[2]Niu L, Wang S, Chen C. Mechanical behavior and deformation mechanism of commercial pure titanium foils[J]. Materials Science and Engineering A, 2017, 707(7): 435-442.
[3]Lin Y C, Huang Jian, He Daoguang, et al. Phase transformation and dynamic recrystallization behaviors in a Ti55511 titanium alloy during hot compression[J]. Journal of Alloys and Compounds, 2019, 795: 471-482.
[4]Guo J, Zhan M, Wang Y Y, et al. Unified modeling of work hardening and flow softening in two-phase titanium alloys considering microstructure evolution in thermomechanical processes[J]. Journal of Alloys and Compounds, 2018, 767: 34-45.
[5]王冠, 田昌龄, 寇琳媛, 等. 6063铝合金双道次热变形微观组织演变[J]. 金属热处理, 2020, 45(5): 23-28.
Wang Guan, Tian Changling, Kou Linyuan, et al. Microstructure evolution of 6063 aluminum alloy during double-pass hot deformation[J]. Heat Treatment of Metals, 2020, 45(5): 23-28.
[6]Li Xuesong, Wu Laizhi, Chen Jun, et al. Static softening characteristics and static recrystallization kinetics of aluminum alloy A6082 after hot deformation[J]. Journal of Shanghai Jiaotong University (Science), 2010, 15(3): 307-312.
[7]赵蒙, 李萍, 薛克敏. TB8钛合金双道次热变形过程软化行为的研究[J]. 稀有金属与硬质合金, 2013, 41(3): 32-35.
Zhao Meng, Li Ping, Xue Kemin. Studay on softening behavior of TB8 titanium alloy during double-rolling hot deformation[J]. Rare Metals and Cemented Carbides, 2013, 41(3): 32-35.
[8]Yan Liangming, Shen Jian, Li Junpeng, et al. Static softening behaviors of 7055 alloy during the interval time of multi-pass hot compression[J]. Rare Metals, 2013, 32(3): 241-246.
[9]Gurao N P, Kapoor R, Suwas S. Deformation behaviour of commercially pure titanium at extreme strain rates[J]. Acta Materialia, 2011, 59(9): 3431-3446.
[10]韩言, 赵飞, 万明攀, 等. TC17钛合金热流变行为及组织演变机制研究[J]. 稀有金属, 2020, 44(3): 234-241.
Han Yan, Zhao Fei, Wan Mingpan, et al. Thermal flow behaviors and microstructure evolution of TC17 alloys[J]. Chinese Journal of Rare Metals, 2020, 44(3): 234-241.
[11]朱松鹤, 戴兵, 张梅, 等. 含Nb-Ti低碳微合金钢双道次高温压缩软化行为[J]. 材料热处理学报, 2010, 31(10): 53-57.
Zhu Songhe, Dai Bing, Zhang Mei, et al. Softening behavior of low carbon Nb-Ti microalloyed steel during hot compression with double-pass[J]. Journal of Materials Heat Treatment, 2010, 31(10): 53-57.
[12]崔聪, 高飞, 高野, 等. 21Cr节镍型双相不锈钢高温形变过程的静态软化分析[J]. 金属热处理, 2022, 47(1): 79-87.
Cui Cong, Gao Fei, Gao Ye, et al. Static softening analysis of 21Cr nickel saving duplex stainless steel during high temperature deformation process[J]. Heat Treatment of Metals, 2022, 47(1): 79-87.
[13]Tang Jie, Zhang Hui, Teng Jie, et al. Effect of Zn content on the static softening behavior and kinetics of Al-Zn-Mg-Cu alloys during double-stage hot deformation[J]. Journal of Alloys and Compounds, 2019, 806: 1081-1091.
[14]刘少飞, 王珂. 近β钛合金高温压缩变形过程中流变软化行为研究进展[J]. 材料工程, 2017, 45(2): 119-128.
Liu Shaofei, Wang Ke. Progress in research on flow softening behavior of near β titanium alloys during hot compression deformation process[J]. Journal of Materials Engineering, 2017, 45(2): 119-128.
[15]范沁红, 马立峰, 蒋亚平, 等. 镁合金双道次热变形静态软化及残余应变[J]. 稀有金属材料与工程, 2017, 46(6): 1590-1595.
Fan Qinhong, Ma Lifeng, Jiang Yaping, et al. Static softening and residual strain of magnesium alloy in the two-pass thermal deformation[J]. Rare Metal Materials and Engineering, 2017, 46(6): 1590-1595.
[16]Lan Liangyun, Qiu Chunlin, Zhao Dewen, et al. Dynamic and static recrystallization behavior of low carbon high niobium microalloyed steel[J]. Journal of Iron and Steel Research, 2011, 18(1): 55-60.
[17]Ma X Z, Xiang Z L, Ma M Z, et al. Investigation of microstructures, textures, mechanical properties and fracture behaviors of a newly developed near α titanium alloy[J]. Materials Science and Engineering A, 2020, 775: 138996.