大块非晶合金塑性变形本构模型的研究进展  

Development of constitute model for plastic deformation of bulk amorphous alloy

作　　者：张士宏[1] 才胜[1] 程明[1] 

机构地区：[1]中国科学院金属研究所,沈阳110016

出　　处：《沈阳师范大学学报（自然科学版）》2011年第3期379-383,共5页Journal of Shenyang Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50705092)

摘　　要：与常规材料相比,大块非晶合金具有优越的使用性能,但其在室温下难以成形。利用过冷液相区的特性,大块非晶合金可以获得优异的成形性能。作为描述非晶合金变形过程的重要手段,非晶合金的本构模型是利用数值模拟研究非晶合金变形必不可少的条件之一。通过建立本构模型来研究非晶合金的塑性变形行为及成形性能,已经得到国内外学者的广泛关注,但目前尚无统一的理论。由于非晶合金的结构具有长程无序的特点,用于解释晶体塑性变形的位错理论不适用于解释非晶合金的塑性变形。对近年来国内外学者在大块非晶合金塑性变形本构模型方面的研究进行了全面的的总结,并简要分析了其局限性及发展趋势。Compared with the conventional materials,bulk amorphous alloys have superior application performance,but they are hard to deform and shape at room temperature.With the characteristic of supercooled liquid region,excellent formability can be obtained for bulk amorphous alloys.As an important means for describing the deformation process of bulk amorphous alloys,the constitutive model is one of the essential conditions for investigating the deformation of bulk amorphous alloys use with numerical simulation.The deformation behavior and formability of bulk amorphous alloy has been widely investigated by researchers worldwide by means of constitutive models.But there is no unified theory.For the structure characteristic of bulk amorphous alloys with long range disorder,dislocation theory used to explain the plastic deformation of the crystal does not apply to explain that of bulk amorphous alloys.In this paper,the work on constitutive models for deformation behavior of bulk amorphous alloy in recent years has been summarized.It also made an analysis about the deficiencies of these models and proposed the tendency for constitutive models of bulk amorphous alloys to develop.

关 键 词：大块非晶合金 塑性变形 本构模型 过冷液相区 

分 类 号：TG139.8[一般工业技术—材料科学与工程]