研究了Zr41.25Ti13.75Ni10Cu12.5Be22.5(原子分数,%)块体非晶合金在玻璃转变终了温度Tend g附近的4个特征温度点(616,636,656和676 K)的等温拉伸行为.结果表明,块体非晶合金的超塑性能与环境温度及拉伸速度紧密相关.在656 K,以5 mm/min的速度拉伸时,获得了1625%的最大延伸率利用速度突变法测出了636,656及676 K时的应力敏感指数分别为0.25,0.65和0.93.利用自由体积模型对块体非晶合金的超塑性流变行为的微观机制进行了分析.
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