金属基复合材料的构型强韧化研究进展<br />-中国材料进展

文章信息/Info

Title:: The Progress on Metal Matrix Composites Strengthened and Toughened by Configuration Design

Author(s):: GENG Lin; FAN Guohua; School of Materials Science and Engineering, Harbin Institute of Technology

摘要:: 构型设计是解决金属基复合材料强度与塑性（韧性）倒置关系的一种重要可行途径，揭示构型设计对复合材料力学行为的影响规律是实现复合材料可设计、可调控的关键。金属基复合材料的构型设计不仅产生了组元相的微观组织的变化，同时也导致了受载条件下局域应变(应力)状态的改变，局域应变(应力)状态的变化将会明显影响金属基复合材料的力学特性。同步辐射X射线、中子衍射、数字图像关联技术的快速发展为我们原位分析复合材料的局域应变（应力）演化行为提供了有力手段，使我们可以建立起“局域应变（应力）演化”—“强韧化机制”—“构型化设计”三者的关系，将有助于提升对于复合材料性能的调控的能力。本文介绍了构型强韧化金属基复合材料的研究进展，提出基于局域应变测量的复合材料构型强韧化机制研究思路，并论述了构型化设计在金属间化合物基复合材料中的典型应用。

Abstract:: Configuration design is one of feasible strategies to overcome the strength-ductility trade-off of metal matrix composites (MMCs). Revealing the effect of configuration design on the mechanical properties is a key to realize the structural controllability of MMCs. The configuration design of MMCs not only changes the microstructures, but also tailors the distribution of local strain (stress) of MMCs under loading. Correspondingly, the change of local strain (stress) distribution will affect the mechanical properties of MMCs. Some advanced characterization technologies including synchrotron radiation X-ray, neutron diffraction, and digital imaging correlation offer strong tools to analyze the local strain (stress), and help us to determine the relationship of local strain distribution, strengthening and toughening mechanism, configuration design, which will improve our ability to tailor the mechanical properties of MMCs. This paper reviews the recent progress on strengthening and toughening MMCs by structural design, and proposes the framework of elucidating the physical mechanisms of strengthening and toughening behavior through in situ strain tracking. The application of configuration design into MMCs is also reviewed.