TC4钛合金电致塑性本构方程建立  

Establishment of constitutive equation of TC4 titanium alloy for electroplasticity

作　　者：翟瑞雪[1,2] 吴庚洋 乔铮 金卓翰 李书宇 张正义 ZHAI Rui-xue;WU Geng-yang;QIAO Zheng;JIN Zhuo-han;LI Shu-yu;ZHANG Zheng-yi(Key Laboratory of Advanced Forging&Stamping Technology and Science,Yanshan University,Qinhuangdao 066004,China;College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学先进锻压技术与科学重点实验室,河北秦皇岛066004 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《塑性工程学报》2024年第3期91-99,共9页Journal of Plasticity Engineering

基　　金：河北省自然科学基金资助项目(E2022203209)。

摘　　要：采用自行设计的绝缘夹具对TC4钛合金板材进行了电致塑性单向拉伸试验。基于对照试验的方法,以无脉冲电流且不同温度条件作为参照,与同等温度条件下脉冲电流加热情况进行对比,以探索电流参数对TC4钛合金电致塑性效应和力学性能的影响规律。结果表明:在试验研究范围内,脉冲电流的占空比主要影响材料的温度变化,脉冲电流密度对TC4钛合金的电致塑性起主导地位,脉冲电流作用下的TC4钛合金材料抗拉强度大幅下降,塑性提高。基于Johnson-Cook模型和Arrhenius方程建立了耦合温度和脉冲电流密度的TC4钛合金电致塑性本构方程,并进行了验证。The electroplastic uniaxial tensile tests of TC4 titanium alloy sheet were carried out by using a self-designed insulation fixture.Based on the method of controlled tests,the non-electric and under different temperature conditions were used as references,and compared with the pulse current heating at the same temperature conditions to explore the effect laws of current parameters on the electroplastic effect and mechanical properties of TC4 titanium alloy.The results show that the duty ratio of pulse current mainly affects the temperature change of material,and the electroplasticity of TC4 titanium alloy is mainly related to the current density,and the tensile strength of TC4 titanium alloy material under the action of pulse current decreases significantly and the plasticity increases.Based on Johnson-Cook model and Arrhenius equation,the electroplastic constitutive equation of TC4 titanium alloy with coupled temperature and pulse current density were established and verified.

关 键 词：TC4钛合金 电致塑性效应 本构方程 应力-应变关系 

分 类 号：TG146.23[一般工业技术—材料科学与工程]