TC11 钛合金流变行为及其应变分段本构模型(英文)  

Flow Behavior and Constitutive Model Using Piecewise Function of Strain for TC11 Alloy

作　　者：崔军辉[1] 杨合[1] 孙志超[1] 李宏伟[1] 李智军[1] 沈昌武[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《稀有金属材料与工程》2012年第3期397-401,共5页Rare Metal Materials and Engineering

基　　金：Natural Science Foundation for Key Program of China(50735005,50935007);Natural Science Foundation(50905145);National Basic Research Program of China(2010CB731701)

摘　　要：针对TC11钛合金,提出了基于应变分段的Arrhenius双曲正弦模型,并进行热模拟压缩试验,分析了TC11钛合金高温流变行为及流变参数对流变应力的影响。采用分段函数的Arrhenius双曲正弦方法,在不同应变区域下求出不同的材料参数,得到了更为精确的本构模型。对比试验结果表明,模型具有很高的精度,并对比了模拟结果,表明模型是可靠的。For TC11 alloy, this paper presented a more accurate constitutive model based on Arrhenius-type hyperbolic sine method by the cubic piecewise function of strain. During this modeling, compression tests of thermal simulation were carried out firstly. The effect of the flow factors on material flow stress was analyzed secondly. On analysis of the test data, the cubic piecewise functions of strain were proposed to ensure the Arrhenius-type hyperbolic sine model of high precision. Comparison with test results shows that the model presented is with high precision and simulation testing proposed show that this model is reliable.

关 键 词：TC11钛合金 流变行为 本构模型 Arrhenius双曲正弦 分段函数 

分 类 号：TG146.23[一般工业技术—材料科学与工程]