祁志旭,岳鹏飞,李习耀,等.铜基金属纳米多层膜界面介导的损伤及断裂行为原位研究进展[J].精密成形工程,2024,16(9):13-21.
QI Zhixu,YUE Pengfei,LI Xiyao,et al.In-situ Research of Interface-mediated Damage and Fracture Behavior of Cu Based Nanostructured Metallic Multilayers[J].Journal of Netshape Forming Engineering,2024,16(9):13-21. |
| 铜基金属纳米多层膜界面介导的损伤及断裂行为原位研究进展 |
| In-situ Research of Interface-mediated Damage and Fracture Behavior of Cu Based Nanostructured Metallic Multilayers |
| 投稿时间：2024-06-29 |
| DOI：10.3969/j.issn.1674-6457.2024.09.002 |
| 中文关键词: 纳米金属多层膜 界面损伤及断裂 位错-界面交互 孪晶-界面交互 原位研究 |
| 英文关键词: nanostructured metallic multilayers interfacial damage and fracture dislocation-interface interaction twins-interface interaction in-situ research |
| 基金项目:河南省科技研发联合基金(225200810058);河南省科学院高层次人才科研启动项目资助(231817064，232017011) |
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| 中文摘要: |
| 作为一种典型异质结构材料，纳米金属多层膜的力学响应通常表现出界面介导的损伤及断裂行为。而基于电镜发展的原位力学测试方法，可实现多层膜变形过程中力学行为的精确刻画，从而有助于揭示其界面损伤及断裂的潜在物理机制。当前围绕纳米多层膜的原位研究已有诸多进展。以铜基金属纳米多层膜为例，从缺陷-界面交互行为出发，基于组元层厚对位错运动的影响，详细讨论了位错塞积、约束层滑移和位错穿越3种位错-界面交互机制导致界面损伤的原位研究进展;阐述了孪晶-界面交互行为对界面损伤的影响，进一步分析了因孪生导致的界面损伤行为。在此基础上，讨论了多层膜变形过程中界面介导的裂纹萌生和扩展行为;基于界面类型、载荷加载形式和裂纹偏转等因素，详细分析了多层膜界面介导的断裂机制。最后对材料损伤断裂行为的原位研究进行了展望。 |
| 英文摘要: |
| As typical heterogeneous materials, nanostructured metallic multilayers exhibit damage and fracture behavior that is mediated by interfaces in their mechanical response. The in-situ mechanical test method based on the evolution of electron microscopy has facilitated the precise delineation of the mechanical behavior of multilayers throughout the deformation process, thus helping uncover the specific physical mechanisms governing interfacial damage and fracture. Currently, the in-situ research on nanostructured multilayers has made considerable progress. With Cu based nanostructured multilayers as model materials and from defect-interface interaction behavior, in-depth discussions were conducted on the in-situ research of interfacial damage caused by three dislocation-interface interaction mechanisms of dislocation pile-up, dislocation-confined layer slip, and dislocation across based on the effect of component layer thickness on dislocation movement. The effect of twins-interface interactions in interfacial damage was further elucidated, and the consequent interfacial damage behavior induced by twinning was meticulously analyzed. The behavior of crack initiation and extension during multilayer deformation mediated by interfaces was further discussed on this foundation. A comprehensive analysis was performed to investigate the interface-mediated fracture mechanisms in multilayers, considering various factors such as interface structure, loading form and crack deflection. Finally, the in-situ research on the damage and fracture behavior of materials was prospected. |
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