Journal of Experiental Mechanicals

不同温度和应变率下的Ti-xNb(x=5, 10, 15)合金压缩力学性能研究

Compression mechanical properties of Ti-xNb (x=5, 10, 15) alloy at different temperatures and strain sates

Received:August 11, 2021 Revised:October 23, 2021

英文关键词:Ti-Nb alloys quasi-static compression hot compression mechanical properties

基金项目:山西省回国留学人员科研资助项目(2020-030)；山西省留学人员科技活动择优资助项目(20200028)；山西省关键技术和共性技术研发攻关专项项目(2020XXX017)

Author Name	Affiliation
ZHAO Shuai	College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
WANG Hefeng*	1.College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China；2.Taiyuan Qingze Zhicheng Technology Partnership, Taiyuan 030024, Shanxi, China
FENG Xiaofei	College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
WANG Yudi	College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

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中文摘要:

为了探究温度、应变率和Nb元素质量分数对Ti-Nb合金力学性能的影响,采用Zwick万能材料试验机和Gleeble-3800型热模拟试验机对Ti-xNb (x=5, 10, 15) 合金在应变率为0.001s^-1、0.01s^-1、0.1s^-1的室温和高温准静态下进行测试。结果表明：三种Ti-Nb合金均为温度和应变率敏感材料,其屈服应力均随着温度的减小和应变率的增加而增大；随着Ti-Nb合金中Nb元素质量分数的增加,合金在准静态下的屈服应力逐渐增加,塑性逐渐减弱。在高温准静态变形下,Ti-5Nb和Ti-10Nb合金分别在800℃、0.001s^-1和760℃、0.001s^-1条件下的回复机制以动态回复为主,其余条件以动态再结晶为主；Ti-15Nb合金的回复机制均以动态再结晶为主。

英文摘要:

To explore the effects of temperature, strain rate, and mass fraction of Nb on mechanical properties of Ti-Nb alloy, the Ti-xNb (x=5, 10, 15) alloys were tested by Zwick universal material testing machine and Gleeble 3800 thermal simulation testing machine, using the room-temperature and high-temperature quasi-static compress methods with various strain rates (0.001s^-1, 0.01s^-1, and 0.1s^-1). The results show that the three Ti-Nb alloys are sensitive to temperature and strain rate, and the yield stress increases with the decrease of temperature and the increase of strain rate. The yield stress increases and the plasticity decreases gradually with increasing of the Nb element mass fraction in Ti-Nb alloy during quasi-static compress condition. During the condition of high-temperature quasi-static deformation, the recovery mechanisms of Ti-5Nb and Ti-10Nb alloys at 800℃, 0.001s^-1 and 760℃, 0.001s^-1, respectively, are dominated by dynamic recovery, while the rest of the conditions are dominated by dynamic recrystallization. The recovery mechanism of Ti-15Nb alloy is mainly dynamic recrystallization.

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