在Gleeble-1500D热模拟实验机上对30ZrCp/W复合材料进行高温压缩实验,变形温度和应变速率分别为800℃～1 200℃和10-3 s-1～1 s-1,研究其高温压缩变形的流变应力行为.研究表明:随变形温度升高,复合材料的流变应力下降,在10-3s-1和1 200℃下,抗压强度为948.7 MPa.在800℃下发生伪塑性变形,未达到预设变形量,真应力-真应变曲线上表现出的塑性为伪塑性,其是由微裂纹的萌生-钝化引起的.随变形温度升高,复合材料发生动态回复再结晶.随应变速率升高,真应力-真应变曲线形状从"锯齿"型向"平滑"型转变.复合材料对应变速率不敏感,随应变速率升高,复合材料的流变应力略有升高.在800℃和1 s-1下,复合材料的抗压强度为1 176.9 MPa.用Arrhenius方程描述复合材料在1 000℃～1 200℃的热变形行为,变形激活能为811.4 kJ/mol.
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