超细晶/纳米晶反Hall-Petch变形机制最新研究进展  

The Current Situation of Deformation Mechanism on Inverse Hall-Petch in Crystalline Material

作　　者：贾少伟[1] 张郑[1] 王文[1] 王快社[1] 高雪[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055

出　　处：《材料导报》2015年第23期114-118,共5页Materials Reports

基　　金：国家自然科学基金(51404180;51274161);西安建筑科技大学青年科技基金(QN1303)

摘　　要：晶粒细化是提高晶体材料力学性能的一种有效强化方式,Hall-Petch关系表明晶体材料的屈服强度和硬度随晶粒尺寸降低而增强。随着超细晶材料和纳米材料的深入研究,实验发现了反Hall-Petch现象,即随着晶粒尺寸的减小,材料性能下降。综述了反Hall-Petch现象中屈服强度、显微硬度及模拟现状,并指出了超细晶和纳米晶细化晶粒的研究方向。Refining grain size is an effective way to improve mechanical properties of crystal materials.HallPetch equation shows that the yield strength and microhardness of crystal materials increase as the grain size decreases.However,with the further research on crystal materials,the inverse Hall-Petch phenomena are observed.The late researches about the phenomena and mechanisms on inverse Hall-Petch through experiments and computational simulations are summarized.The researching direction of refining ultrafine grain and nanometer materials is put forward.

关 键 词：屈服强度 硬度 模拟 反Hall-Petch关系 

分 类 号：TG146[一般工业技术—材料科学与工程]