采用等截面通道角形挤压技术对高纯铝进行室温大塑性变形,通过不同角度模具沿路径A组合挤压,实现了高纯铝的晶粒细化,晶粒尺寸可达0.6μm以下,且硬度和屈服强度显著增加.微观组织分析表明:不同角度模具组合挤压可以得到不同的剪切平面组合,使得相邻两次挤压剪切平面的夹角为75°,从而使得高纯铝在相对较小的塑性变形情况下得到超细晶粒结构,证明等截面通道角形挤压方法中剪切平面对晶粒细化效果的影响是非常大的.
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