Transactions of Materials and Heat Treatment

Title：Microstructure and properties of TC4 titanium alloy sheets with different rolling thicknesses

Authors： Tong Xiaole1 Zhang Mingyu 2 Yu Chenquan3 Yue Xu1 Wang Raoyu2 Zhang Yafeng1

Unit： 1.Xinjiang Xiangrun New Materials Technology Co. Ltd. 2.Engineering Research Center of Continuous Extrusion Dalian Jiaotong University 3.College of Applied Technology Changchun University of Technology

KeyWords： TC4 titanium alloy sheet metallographic structure mechanical property anisotropy fracture morphology

ClassificationCode：TG335.4

year,vol(issue):pagenumber：2022,47(6):153-159

Abstract：

Four kinds of TC4 titanium alloy rolled sheets with different thicknesses were selected, and the metallographic structures and mechanical properties of sheets with different thicknesses were studied by metallographic microscope and mechanical property test. The results show that the microstructure of TC4 titanium alloy sheets after rolling and annealing is a mixed structure composed of α phase and residual β phase, and the morphology for α phase presents the characteristics of linear, equiaxed and small clusters. With the increasing of thickness, the strength of TC4 titanium alloy shees decreases first and then tends to be stable, while the plasticity increases first and then tends to be stable. When the thickness is 0.8 mm, the strength of TC4 titanium alloy sheets is the largest, the tensile strength is 1075 MPa, and the yield strength is 1027 MPa. The strength and plasticity along the RD and TD directions for four kinds of TC4 titanium alloy sheets with different specifications after rolling and annealing are different. The fracture morphology of TC4 titanium alloy sheets with different specifications after tensile is mainly dimple. In addition to dimple morphology, there are a certain number of small planes along the TD direction for the fracture morphology of TC4 titanium alloy sheet with the thickness of 0.8 mm, and there are also a large number of especially fine micro-cracks inside the dimples.

Funds：

自治区创新环境（人才、基地）建设专项（XJQY2009）；自治区创新环境（人才、基地）建设专项-天山创新团队计划项目（2020D14041）

同晓乐(1987-)，男，学士，中级工程师 E-mail：xjxrunjs@163.com 通信作者：岳旭(1985-)，男，硕士，高级工程师 E-mail：yuexu100@163.com

Reference：

[1]吴晨,马保飞,肖松涛,等.航天紧固件用TC4钛合金棒材固溶时效后的组织与性能[J].金属热处理,2021,46(11):166-169.

Wu C, Ma B F, Xiao S T, et al.Microstructure and properties of TC4 titanium alloy bars for aerospace fasteners after solution and aging[J].Heat Treatment of Metals,2021,46(11):166-169.

[2]王瑶,李永刚,李文辉,等.深冷处理对TC4钛合金滚磨光整加工性能的影响[J].稀有金属,2021,45(11):1289-1298.

Wang Y, Li Y G, Li W H, et al. Effect of cryogenic treatment on the rolling finishing performance of TC4 titanium alloy[J].Chinese Journal of Rare Metals, 2021,45(11):1289-1298.

[3]徐凯华,刘海军,闫江鹏,等.热等静压态TC4钛合金在多道次热压缩变形中的组织演变[J].塑性工程学报,2021,28(7):150-156.

Xu K H, Liu H J, Yan J P, et al.Microstructure evolution of hot isostatic TC4 titanium alloy during multi-pass hot compression deformation[J]. Journal of Plasticity Engineering,2021,28(7):150-156.

[4]李洪波,王琳,田锋,等.TC4钛合金薄壁筒形件反挤压成形及微观组织演化[J].塑性工程学报,2021,28(10):19-26.

Li H B, Wang L, Tian F, et al.Reverse extrusion forming and microstructure evolution of TC4 titanium alloy thin-walled cylindrical parts[J]. Journal of Plasticity Engineering,2021,28(10):19-26.

[5]韩盈,余伟,董恩涛,等.轧制工艺对TC4合金板材织构演变及组织和性能的影响[J].稀有金属材料与工程,2021,50(10):3585-3590.

Han Y,Yu W, Dong E T, et al. Effect of rolling process on texture evolution, microstructure and properties of TC4 alloy sheet [J]. Rare Metal Materials and Engineering,2021,50(10):3585-3590.

[6]王伟,宫鹏辉,史亚鸣,等.轧制火次对EB熔炼TC4钛合金显微组织、织构和力学性能的影响[J/OL].中国有色金属学报:1-18[2022-05-07].http://kns.cnki.net/kcms/detail/43.1238.TG.20211025.1612.005.html

Wang W, Gong P H, Shi Y M, et al. Effect of rolling times on microstructure, texture and mechanical properties of EB melting TC4 titanium alloy[J/OL]. The Chinese Journal of Nonferrous Metals: 1-18[2022-05-07].http://kns.cnki.net/kcms/detail/43.1238.TG.20211025.1612.005.html

[7]GB/T 23605—2009, 钛合金β转变温度测定方法[S].

GB/T 23605—2009, Method for β transus temperature determination of titanium alloys [S].

[8]Barnett M R, Kestens L . Formation of {111} and {111} textures in cold rolled and annealed IF sheet steel[J]. ISIJ International, 1999, 39(9):923-929.

[9]王牛俊,罗乾伟.TC4钛合金板不同加工条件下组织对比研究[J].材料开发与应用,2017,32(4):95-100.

Wang N J, Luo Q W.Comparative study on microstructure of TC4 titanium alloy plate under different processing conditions [J]. Development and Application of Materials,2017,32(4):95-100.

[10]安震,李天麒,王琛,等.Ti555211钛合金片层组织拉伸过程裂纹扩展的SEM原位观察[J].稀有金属材料与工程,2019,48(3):853-858.

An Z, Li T Q, Wang C, et al. In-situ SEM observation of crack propagation in lamellar microstructure of Ti555211 titanium alloy during tensile process[J]. Rare Metal Materials and Engineering,2019,48(3):853-858.

[11]朱新杰,范群波,余洪,等.Ti-4.5Mo-5.1Al-1.8Zr-1.1Sn-2.5Cr-2.9Zn钛合金的动态力学性能及失效研究[J].稀有金属材料与工程,2020,49(4):1235-1241.

Zhu X J,Fan Q B,Yu H,et al.Research on dynamic mechanical properties and failure of Ti-4.5Mo-5.1Al-1.8Zr-1.1Sn-2.5Cr-2.9Zn titanium alloy[J]. Rare Metal Materials and Engineering,2020,49(4):1235-1241.

[12]刘清华,惠松骁,叶文君,等.不同组织状态TC4 ELI钛合金动态力学性能研究[J].稀有金属,2012,36(4)：517-522.

Liu Q H, Hui S X, Ye W J,et al.Dynamic mechanical properties of TC4 ELI titanium alloy with different microstructure[J]. Chinese Journal of Rare Metals, 2012,36(4):517-522.

[13]Nasiri-Abarbekoh H, Ekrami A,Ziaei-Moayyed A A, et al. Effects of rolling reduction on mechanical properties anisotropy of commercially pure titanium[J]. Materials & Design, 2012, 34(11):268-274.

[14]张虎. 热处理工艺对新型高强β钛合金组织和性能的影响[D]. 西安：西安建筑科技大学,2013.

Zhang H.Effect of Heat Treatment Process on Microstructure and Properties of New High Strength β Titanium Alloy [D]. Xi′an：Xi′an University of Architecture and Technology, 2013.

Service：

【This site has not yet opened Download Service】【Add Favorite】