异质结构钛基复合材料综述

Heterostructures Titanium Matrix Composites： A Review

摘要:

钛基复合材料（titanium matrix composites, TMCs）因其高的比强度和比模量，而被广泛应用于航空航天等关键承载部件，但其室温强度-塑韧性倒置瓶颈问题限制了其广泛应用。近年来随着异质结构材料的异变诱导（HDI）强化和硬化效应理论的提出，为突破TMCs强韧性倒置难题带来希望。本综述在概述异质结构钛合金研究进展的基础上，综述了TMCs的复合化策略和研究现状，讨论了均质TMCs的失效机制，总结了近年来TMCs利用增强相的钉扎效应进行构型化设计的最新进展。以“硬包软”的网状结构和“软包硬”的球团结构为例，从异质结构TMCs的分类、设计、制备方法、强化机制等方面进行讨论分析，为开发高强高韧TMCs提供研究参考和依据。

Abstract:

Titanium matrix composites (TMCs), owing to their high specific strength and high specific modulus, hold great promise for applications in load-bearing aerospace components. However, the strength-ductility trade-off at room temperature significantly restricts their widespread use. The hetero-deformation induced (HDI) hardening effect in heterogeneous structured materials offers a new approach to overcoming the strength-toughness trade-off bottleneck in TMCs. The recent advances in heterogeneous structured titanium and titanium alloys were outlined, then the current research status and compositing strategies of TMCs were summarized and discussed. The failure mechanisms of homogeneous TMCs were elucidated, and the latest developments in configuration and heterostructure design by the pinning effects of reinforcement phases were highlighted. Taking the "hard-in-soft" network structures and "soft-in-hard" granular structures as examples, this work reviewed the design concepts, fabrication methods, classification, and strengthening mechanisms of heterogeneous structured TMCs, providing insights and references for the development of TMCs with a well-balanced strength-ductility relationship.