一种基于试验和理论推导的金属材料高温弹性模量的提取方法

摘要

为解决由于现有测试方法和测试手段的局限,一些难熔金属材料的高温物理特性无法直接测试的难题,研究提出一种试验测试和理论计算相结合的高温弹性模量提取方法.研究结果表明:此种方法以较低温度(300℃以下)下试验测试数据为基础,建立拟合回归方程,外推获得1000℃以上温度的材料的弹性模量值,解决了难熔金属材料高温弹性模量因材料氧化而无法直接准确测量的问题,可应用于产品可靠性设计,有效提高仿真计算结果的准确度.%Some physical properties of refractory metal materials can't be tested directly at high temperature due to limitations of existing test methods and means.High temperature Young's modulus extraction method based on experimental data and theoretical derivation was proposed to solve the problem.On the basis of the test data at low temperature (under 300℃),a fitting regression equation was established to obtain the Young's modulus value of material above 1000℃ by extrapolation.This method solves the problem that the Young's modulus of refractory metal materials cannot be directly measured accurately at high temperature because of material oxidation.It can also provide accurate simulation of materials for product reliability design,and improve the simulation accuracy effectively.