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,一直制约其大规模工程应用。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,其中利用"相变诱导塑性"概念制备块体非晶合金复合材料来韧塑化非晶合金成为卓有成效的方案之一,通过此方法成功地制备出同时具有拉伸塑性和加工硬化能力的非晶合金复合材料。然而,该类块体非晶合金复合材料要求的形成条件更严格,同时具有更复杂的多相协调变形过程和更独特的性能优化方案。从该类块体非晶合金复合材料的形成、性能特点、韧塑化机理及性能优化等方面进行综述,并对其未来发展进行了简要展望。
Bulk metallic glasses （BMGs） show unique mechanical properties due to their long-range disordering atomic structure and are regarded as one of the promising engineering materials. But their room-temperature brittleness and strainsoftening during deformation have been a stumbling block for practical structural applications. To solve this problem, many approaches have been developed among which the concept of ＂transformation-induced plasticity＂ （TRIP） was proved to be effective to enhance both tensile ductility and work-hardening capability of metallic glasses. BMG composites with not only tensile ductility but also work-hardening capability have been successfully fabricated by this approach. However, the TRIP-phase-reinforced BMG composites have unique formation and deformation mechanisms. In this brief review, the formation, deformation behavior, optimizing strategies and ductilizing mechanism were summarized and the potential develop- ments were also discussed.
出处
《中国材料进展》
CAS
CSCD
2014年第5期300-311,共12页
Materials China
基金
国家自然科学基金项目(51010001
51371003
51001009)
111创新引智项目(B07003)
长江学者创新团队项目
"北京市青年英才计划资助"北京科技大学中央高校基本科研业务费(FRF-SD-12-005A)
西北工业大学中央高校基本科研业务费基础研究基金项目(3102014JCQ01090)
关键词
金属玻璃
非晶合金
相变诱导塑性
韧塑化
metallic glass
amorphous alloy
transformation-induced plasticity
ductilizing
