摘要
为了探索SPD法制备纳米/超细晶金属材料的新工艺方法,对ECAP、HPT等经典工艺方法制备纳米/超细晶金属材料的晶粒细化特点进行了分析,结果显示目前SPD工艺存在的问题主要表现在:成形效率低、变形过程中出现疲劳裂纹、制件尺寸小、显微组织不均匀。指出今后SPD的研究应从晶粒细化机理和纳米结构与材料性能的关系等方面展开。
In order to explore new SPD forming method for fabricating nanocrystallized material,the characteristics of grain refinement by ECAP and HPT were studied.Extensive investigations show that the recent main problems of SPD processes are low forming efficiency,fatigue crack in deformation process,small specimen size,uneven microstructure.Finally the further research field which lies in grain refinement mechanism and relations between microstructure and material properties was pointed out.
出处
《锻压技术》
CAS
CSCD
北大核心
2011年第2期48-52,共5页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51075153)
广东省自然科学基金资助项目(10151040301000000)
关键词
强烈塑性变形
纳米/超细晶
晶粒细化
成形方法
severe plastic deformation
ultra-fine grain/ nanocrystalline
grain refinement
forming method
