块体非晶合金的韧塑化

发布时间：2018-05-04 17:37

本文选题：块体非晶合金 + 韧塑化　；参考：《物理学报》2017年17期

【摘要】：块体非晶合金因其独特的原子结构而具有许多优异的力学性能,成为近年来材料领域的研究热点之一,但是由于其在变形过程中的室温脆性和应变软化等关键问题一直制约着其实际工程应用.为解决此问题,块体非晶合金领域的研究者们提出了多种方案,包括通过在非晶合金中调控其内禀特性如弹性常数、结构不均匀性,通过外加手段改变其应力及缺陷状态,通过外加和内生的方法在非晶基体中引入晶态增强相等方式,获得了一系列力学性能优异的块体非晶合金及其复合材料.特别是利用"相变诱导塑性"(transformation-induced plasticity,TRIP)概念研制出的块体非晶合金复合材料,同时具有大的拉伸塑性和加工硬化能力.本文围绕块体非晶合金的韧塑化这个关键科学问题,对单相非晶及非晶复合材料的韧塑化方案及机理进行了综述,着重介绍了TRIP韧塑化块体非晶合金复合材料的制备、性能、组织调控及韧塑化机理等,并对此领域的未来发展进行了展望.
[Abstract]:The bulk amorphous alloy has many excellent mechanical properties because of its unique atomic structure. It has become one of the hot topics in the field of materials in recent years. However, its practical engineering applications have been restricted because of its key problems at room temperature brittleness and strain softening in the process of deformation. A variety of schemes have been proposed, including the regulation of their intrinsic properties, such as elastic constants and structural inhomogeneity in amorphous alloys, to change their stress and defect state by external means. By adding an added and endogenous method to the amorphous matrix, a series of bulk amorphous alloys with excellent mechanical properties have been obtained. And its composite materials, especially the bulk amorphous alloy composites developed by the concept of transformation-induced plasticity (TRIP), with large tensile ductility and hardening ability. This paper focuses on the key scientific problems of the toughening and plasticization of bulk amorphous alloys, on single-phase amorphous and Amorphous Composites The toughening and plasticizing schemes and mechanisms are reviewed. The preparation, properties, tissue regulation and toughening and plasticizing mechanism of TRIP toughened and plasticized bulk amorphous alloy composites are introduced, and the future development of this field is also prospected.

【作者单位】：北京科技大学新金属材料国家重点实验室;
【基金】：国家自然科学基金(批准号:51531001,51671018,51422101,51371003) 111创新引智项目(批准号:B07003) 科技部国际合作项目(批准号:2015DFG52600) 万人计划青年拔尖人才项目中央高校基本科研业务费(批准号:FRF-TP-15-004C1)资助的课题~~
【分类号】：TG139.8

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