Cu-Ti合金的热变形行为及其组织研究  

Hot Deformation Behavior and Microstructure of Cu-Ti Alloy

作　　者：曹兴民[1,2] 朱玉斌[1] 郭富安[2] 汤玉琼[2] 向朝建[2] 杨春秀[2] 

机构地区：[1]上海大学,上海200444 [2]苏州有色金属研究院,江苏苏州215026

出　　处：《稀有金属材料与工程》2009年第A01期509-514,共6页Rare Metal Materials and Engineering

摘　　要：研究了Cu-Ti合金的热模拟压缩试验。试验表明:变形温度的升高和应变速率的减少使峰值应力和稳态应力显著降低,变形温度会影响进入稳态流动所需变形量。建立的Cu-Ti合金高温变形时的流变应力模型表征了变形温度、应变速率和变形程度对流变应力的影响,模型的计算精度较高,根据实验建立了热加工图。通过对热压缩变形过程中组织的观察得出,不连续β相的析出,是材料加工软化的主要原因。The isothermal compression of Cu-Ti alloy has been carried out at a Thermecmaster-Z simulator. The experimental results show that the peak stress decrease greatly with increasing of deformation temperature and decreasing of strain rate, and that the deformation temperature will affect the threshold strain to transmit the steady deformation. Meanwhile, the present constitutive equation represents the effect of deformation temperature, strain rate and strain on flow stress in high temperature deformation of Cu-Ti. The calculated results of flow stress are in good agreement with the experimental results in high temperature deformation of Cu-Ti alloy. According to the experiment result, the hot processing map was obtained. The flow softening during hot compression was related to the volume fraction of material transformed by discontinuous precipitation process.

关 键 词：Cu-Ti合金 流变应力模型 不连续析出 

分 类 号：TG146.23[一般工业技术—材料科学与工程]