金属层状复合材料的力学行为及微观变形机理
Mechanical Behavior and Deformation Micro-Mechanisms of Laminated Metallic Composites
姜爽 1贾楠 2Peng Lin Ru3
作者信息
- 1. 东北大学 材料电磁过程研究教育部重点实验室, 辽宁 沈阳 110819
- 2. 东北大学材料科学与工程学院 材料各向异性与织构教育部重点实验室, 辽宁 沈阳 110819
- 3. 林雪平大学工程材料系, 瑞典 林雪平 58183
- 折叠
摘要
金属层状复合材料作为一种典型的非均质材料,通过调控其内部的多尺度微结构特性,可以实现金属结构材料强度-韧性的协同提升,在高端先进制造领域具有潜在的应用前景.金属层状复合材料的宏观力学性能显著依赖于各组元层的性能、厚度和异质界面的结构特性.变形过程中材料内部的微观应力/应变在异质界面处的协调特性对组元金属的形变微观机制产生重要影响,进而影响复合材料整体的性能.因此,探索金属层状复合材料的"微观结构-力学行为-变形机制-宏观力学性能"的内在关联并揭示其对应的微观形变机理,对设计具有优异综合力学性能的金属层状复合材料有重要的理论指导意义和实际应用价值.聚焦于晶态金属层状复合材料的微观力学行为及变形机理,介绍了其力学行为的尺寸与界面效应,着重讨论了室温下材料的微观形变物理过程,阐明了非均匀金属层状复合体强韧化的机理.最后,对金属层状复合材料力学行为的研究进行了简要展望.
Abstract
Laminated metallic composites(LMCs),designed based on the concept of heterostructured materials,can real-ize the synergistic improvement of strength and ductility for metallic structural materials by adjusting their internal multi-scale microstructure characteristics,and have potential application prospects in the advanced manufacturing fields.The macro-scopic mechanical properties of LMCs strongly depend on the intrinsic properties and layer thickness of individual constitu-ents as well as the characteristics of heterophase interfaces.During the deformation process,the microscopic stress/strain ac-commodation characteristics at the heterophase interfaces play a crucial role in the deformation micro-mechanisms of constitu-ent metals,thereby influencing the global performance of the LMCs.Therefore,exploring the internal correlation of"microstructure-mechanical behavior-deformation mecha-nisms-mechanical properties"of LMCs and revealing the corresponding microscopic mechanisms have important theo-retical guiding significance and practical application value for designing LMCs with excellent comprehensive mechani-cal properties.This paper focuses on the micro-mechanical behaviors and deformation mechanisms of crystalline LMCs,introduces the size and interface effects on the mechanical behaviors.Especially,the micro-mechanical behaviors at room temperature are discussed,which sheds light on the strengthening and toughening mechanisms of heterogeneous LMCs.Fi-nally,a brief prospect on the mechanical behavior research of LMCs in the future is given.
关键词
金属层状复合材料/塑性变形/微观力学行为/变形机制/异质界面/强韧化机制Key words
laminated metallic composites/plastic deformation/micro-mechanical behavior/deformation mechanisms/hetero-phase interfaces/strengthening/toughening mechanisms引用本文复制引用
基金项目
国家自然科学基金(51922026)
国家自然科学基金(52301138)
出版年
2024
NETL
NSTL
维普
万方数据