Cu-Cr-Zr-Ag合金高温热变形行为与变形机制
发布时间:2018-10-22 16:10
【摘要】:在Gleeble-1500D热模拟试验机上对Cu-Cr-Zr-Ag合金进行高温等温压缩试验,当热压缩应变速率为0.001~10 s-1、热变形温度为650~950℃时,同时对合金高温热压缩的热加工图以及变形机制进行研究。结果表明:流变应力随变形温度的升高而减小,随应变速率的提高而增大;热变形过程中的稳态流变应力可用双曲正弦本构关系式来描述,其激活能为Q=343.23 k J/mol,同时利用逐步回归的方法建立了该合金的流变应力方程。根据动态材料模型计算并分析了合金的热加工图,并且获得了试验参数范围内热变形过程的最佳工艺参数:温度为750~800℃、应变速率范围为0.01~0.1 s-1,并利用热加工图分析了该合金不同区域的高温变性特征以及组织变化。
[Abstract]:The high temperature isothermal compression test of Cu-Cr-Zr-Ag alloy was carried out on the Gleeble-1500D thermal simulator. When the strain rate of hot compression was 0.001n-1 and the hot deformation temperature was 650 ~ 950 鈩,
本文编号:2287647
[Abstract]:The high temperature isothermal compression test of Cu-Cr-Zr-Ag alloy was carried out on the Gleeble-1500D thermal simulator. When the strain rate of hot compression was 0.001n-1 and the hot deformation temperature was 650 ~ 950 鈩,
本文编号:2287647
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