强变形制备超细晶金属材料的方法

强变形是细化晶粒的有效方法,甚至可以制备纳米材料,最近十几年来大量的强变形方法涌现出来,研究也越来越多.介绍了等通道角挤压、高压扭转、连续限制带材角轧挤、循环挤压、限制斜槽压缩、反复弯曲校平、累积叠轧焊等方法,回顾了各种方法可以得到的最大应变量、细化晶粒效果及应变量计算公式.阐述了强变形及剪切变形细化晶粒的机制.

Severe Plastic Deformation Methods for Ultra-fine Grained Materials

Severe plastic deformation (SPD) is a very effective way for grain refinement, which even can be used to produce nanostructured materials. Large number of new SPD methods are developed and studied. The manipulation of some of these methods, such as equal channel angular pressing, high pressure torsion shear, continuous confined strip shearing, cyclic extrusion compression, constrained groove pressing, repetitive corrugation and straightening, accumulative roll bonding is introduced. And the maximum strain, efficiency of grain refinement and equation to calculate strain are also reviewed.