非连续增强钛基复合材料多尺度组织设计与强韧化机制研究进展

Research Progress on Multi-scale Microstructure Design and Strengthening-Toughening Mechanisms of Discontinuously Reinforced Titanium Matrix Composites

摘要:

非连续增强钛基复合材料（DRTMCs）具有轻质高强耐热等优点，在航空航天和3C消费电子等领域具有广阔的应用前景。受自然界材料多级多尺度构型启发，非连续增强钛基复合材料从单一增强相均匀分布，到增强相构型化设计，进而发展为多尺度增强相构型化与钛合金基体跨尺度分级结构的协同设计调控，其组织形式逐渐丰富进而演化为多尺度异质结构，可以充分发挥多种协同强化机制，强化效率不断提高；同时能够合理分配应力应变，并有效阻碍裂纹萌生扩展，保证了良好的塑性和抗损伤能力。本文梳理了非连续增强钛基复合材料中典型构型设计及其发展思路，介绍其强韧化机制，并结合当前研究对未来材料发展方向提出展望，推动高性能钛基复合材料在关键领域的应用。

Abstract:

Discontinuously reinforced titanium matrix composites (DRTMCs) exhibit advantages such as light weight, high strength, and heat resistance, demonstrating broad application prospects in aerospace, consumer electronics, and other fields. Inspired by the multi-scale architectures of natural materials, the design of DRTMCs has evolved from uniformly distributed single reinforcements to architecture reinforcement configurations, and further to the coordinated design and regulation of multi-scale reinforcement architectures coupled with hierarchical titanium matrix. This progression has enriched their microstructure, leading to the formation of multi-scale heterogeneous structures. Such structures fully leverage synergistic strengthening mechanisms to enhance strengthening efficiency. Moreover, these composites effectively avoid strain localization to ensure favorable plasticity while maintaining excellent damage resistance. This review summarizes typical configuration design strategies and their evolutionary pathways in DRTMCs, elucidates the underlying strengthening-toughening mechanisms, and proposes future research directions based on current advancements to advance the application of high-performance titanium matrix composites in critical fields.