研制出一种以Ti2Co相弥散强化α-Ti基体的钛合金Ti-8Co-5Al.实验表明,在变形温度为725℃,应变速率为1×10-3s-1的条件下可获得断裂延伸率708%.从实测应变速率敏感性指数为0.47,并结合试样断口处纵向剖面显微组织的扫描电镜观察,表明在Ti-8Co-5Al合金中发生了α-Ti晶界及α-Ti/Ti2Co相界的滑移为主要变形机制的变形过程.采用Ti-8Co-5Al合金在730℃和1×10-3s-1应变速率条件下成功地等温锻造出飞机零件,比Ti-6Al-4V合金低约210℃.
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