研究了镁基复合材料超塑性变形过程中SiC晶须织构的演化规律,并分析了其对孔洞行为的影响.超塑性拉伸试验在613 K～723 K,8.3×10-4s-1～8.3×10-2s-1条件下进行.在613K,1.67×10-2s-1初始应变速率下,获得了200%的延伸率.SiC晶须在超塑性变形过程中发展出强烈的<111>//ED纤维织构.SiC晶须的这种取向对晶界滑动有阻碍作用,不仅使孔洞易于萌生,也加速了其长大与连接.
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