Comparative study of constitutive modeling for Ti-6Al-4V alloy at low strain rates and elevated temperatures
Comparative study of constitutive modeling for Ti-6Al-4V alloy at low strain rates and elevated temperatures
复制标题
DOI：
10.1016/j.matdes.2013.10.089
复制
发表时间：
2014-03-01
影响因子：
8.4
通讯作者：
Singh, Swadesh Kumar
中科院分区：
文献类型：
--
作者：
Kotkunde, Nitin;Deole, Aditya D.;Singh, Swadesh Kumar
考虑到应变、应变率和温度的综合影响，准确预测金属的流动行为对于理解金属的流动响应是至关重要的。在应变率为10(5)、10(4)、10(3)和10(2)的条件下，从323K到673K进行了等温单轴拉伸试验。S(1)。本文采用Johnson-Cook(JC)、Fields-Backofen(FB)、Khan-Huang-亮(KHL)和机械门槛应力(MTS)四种本构模型对Ti-6Al-4V合金板材的流动行为进行了预测。使用相关系数(R)、平均绝对误差(Delta)及其标准差(Delta)等统计指标对这些本构模型的预测进行了比较。统计方法分析表明，FB模型与实验值偏差较大。而其他模型(JC、KHL和MTS)的预测结果与实验结果非常接近。JC和KHL是预测流动应力的较好模型。然而，考虑到MTS模型是基于物理的模型，MTS模型比其他模型更受欢迎。(C)2013爱思唯尔有限公司。保留所有权利。
An accurate prediction of flow behavior of metals considering the combined effects of strain, strain rate and temperature is essential for understanding flow response of metals. Isothermal uniaxial tensile tests have been performed from 323 K to 673 K at an interval of 50 K and strain rates 10 (5), 10 (4), 10 (3) and 10 (2) s (1). In this study prediction of flow behavior of Ti-6Al-4V alloy sheet is done using four constitutive models namely; Johnson-Cook (JC), Fields-Backofen (FB), Khan-Huang-Liang (KHL) and Mechanical Threshold Stress (MTS). The predictions of these constitutive models are compared using statistical measures like correlation coefficient (R), average absolute error (Delta) and its standard deviation (delta). Analysis of statistical measures revealed that FB model has more deviation from the experimental values. Whereas, the predictions of all other models (JC, KHL, and MTS) are very close to the experimental results. JC and KHL are better models for predicting the flow stress. However, considering the fact that MTS model is a physical based model, MTS model is preferred over other models. (C) 2013 Elsevier Ltd. All rights reserved.