纳米结构金属材料的塑性变形制备技术

PREPARATION TECHNIQUES FOR NANOSTRUCTURED METALLIC MATERIALS VIA PLASTIC DEFORMATION

本文总结了制备纳米结构金属材料的塑性变形技术,包括大应变量变形技术(冷轧、累积叠轧、等通道挤压和高压扭转)、高应变速率变形技术(动态塑性变形)和高应变梯度变形技术(表面机械研磨和表面机械碾压),分析了变形方式及变形参数对晶粒细化的影响规律,展望了利用塑性变形技术制备纳米结构金属材料的发展趋势及挑战.

This work summarized the deformation techniques of preparing the nanostructured metallic materials, including large-strain deformation techniques （clod rolling, accumulative cold-bonding, equal channel angular pressing, high pressure torsion）, high-strain-rate deformation technique （dynamic plastic deformation）, and high- strain-gradient deformation techniques （surface mechanical attrition treatment and surface mechanical grinding treatment）. The effects of deformation modes and deformation parameters on grain refinement are analyzed. Future trends and challenges of the deformation techniques for preparing nanostructured metallic materials are discussed.