对工业供应态LY12铝合金棒材的超塑性进行了研究.结果表明:该合金在温度为753 K、应变速率为3.3×10-4s-1的拉伸变形条件下,断裂延伸率为313%,应变速率敏感性指数m值约为0.33;断裂延伸率的实验值与Ghosh-Ayres公式的理论值吻合;超塑性变形的主导机制符合Langdon大晶粒模型.
参考文献
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