中文摘要：

相等的隧道尖紧迫(ECAP ) 实验与工业纯铝和一个内部模子被执行。在 ECAP 前后的材料谷物尺寸的比较被使用电子背的技术执行散布衍射(EBSD ) 。结果证明在在 ECAP 以后的材料的谷物被精制，收益应力和最终的强度被增加。为了为驾驶谷物在 ECAP 和原因期间调查变丑机制，缩放精炼， ECAP 过程的三维的数字模拟被执行。基于矿脉参数分析，材料样品的变丑被发现很复杂，不是就纯通过尖隧道在挤出期间砍。模拟证实在样品材料的一个强壮的紧张坡度被 ECAP 强加。

英文摘要：

The equal channel angular pressing（ECAP） experiments were carried out with industrial pure aluminum and an in-house mould. The comparison of material grain size before and after ECAP was performed by applying the technique of electron back scattered diffraction（EBSD）. The results show that the grains in the material after ECAP are refined and the yield stress and ultimate strength are increased. In order to investigate the deformation mechanism during ECAP and the reason for driving grain size refinement, three-dimensional numerical simulations of the ECAP process were carried out. Based on the Lode parameter analysis, the deformation of the material sample is found very complicated, not just pure shear during extrusion through the angular channel. The simulation confirms that a strong strain gradient in the sample material is imposed by the ECAR.