Hot Compressive Deformation Behavior of 30% TiC/Cu-Al<sub>2</sub>O<sub>3</sub> Composite

Yang Zhiqiang; Liu Yong; Tian Baohong; Zhang Yi

doi:10.15980/j.tzzz.2014.04.006

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Hot Compressive Deformation Behavior of 30% TiC/Cu-Al₂O₃ Composite
Vol. 34, Issue 4, Pages: 433-436(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.04.006

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[1]杨志强,刘勇,田保红,张毅.TiC含量为30%的TiC/Cu-Al_2O_3复合材料的热压缩行为[J].特种铸造及有色合金,2014,34(04):433-436.

Yang Zhiqiang, Liu Yong, Tian Baohong, et al. Hot Compressive Deformation Behavior of 30% TiC/Cu-Al₂O₃ Composite. [J]. Special Casting & Nonferrous Alloys 34(4):433-436(2014)
[1]杨志强,刘勇,田保红,张毅.TiC含量为30%的TiC/Cu-Al_2O_3复合材料的热压缩行为[J].特种铸造及有色合金,2014,34(04):433-436. DOI： 10.15980/j.tzzz.2014.04.006.

Yang Zhiqiang, Liu Yong, Tian Baohong, et al. Hot Compressive Deformation Behavior of 30% TiC/Cu-Al₂O₃ Composite. [J]. Special Casting & Nonferrous Alloys 34(4):433-436(2014) DOI： 10.15980/j.tzzz.2014.04.006.

摘要

利用Gleeble-1500D热力模拟试验机

在温度为450

50℃、应变速率为0.001

.000s-1、真应变量为0.7的条件下

对TiC含量为30%的TiC/Cu-Al2O3复合材料进行了热压缩试验

研究了其流变应力及本构方程。结果表明

材料的流变应力-应变曲线主要以动态再结晶软化机制为特征

峰值应力随变形温度的降低或应变速率的升高而增加

属于温度和应变速率敏感材料;在真应力-应变曲线基础上

建立的TiC/Cu-Al2O3复合材料高温本构模型可较好地表征其高温流变特征。

Abstract

Using the Gleeble-1500Dsimulator

the high-temperature plastic deformation behavior

the flow stress and constitutive equation of 30%TiC/Cu-Al2O3composites were investigated at 450

50℃ with the strain rate of 0.001 1s-1 and total strain of 0.7.The results show that the high-temperature flow stress-strain curves of the composites are characterized by softening mechanism of the dynamic recrystallization

and the peak stress is increased with the decrease of deformation temperature or the increase of strain rate

which reveals that the composites belong to temperature and strain rate sensitive material.Based on the true stress-strain curves

the established constitutive equation represents the high-temperature flow behavior of 30% TiC/Cu-Al2O3composites

and the calculated results of the flow stress are well agreement with the experimental ones.