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| 镀镍石墨烯/钛复合材料界面力学行为的分子动力学研究 |
| Molecular Dynamics of Interfacial Mechanical Behavior of Nickel-plated Graphene/Titanium Composites |
| Received:March 02, 2024 |
| DOI：10.3969/j.issn.1674-6457.2024.04.006 |
| 中文关键词: 镀镍石墨烯 钛基复合材料 分子动力学 界面 力学行为 |
| 英文关键词: nickel-plated graphene titanium-based composites molecular dynamics interfaces mechanical behavior |
| 基金项目:国家重点研发计划(2022YFB3705701);国家自然科学基金(52032002) |
| Author Name | Affiliation | | WANG Rui | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150000, China | | HAN Xiuli | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150000, China | | KANG Pengchao | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150000, China | | LI Wanying | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150000, China | | WU Gaohui | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150000, China |
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| 中文摘要: |
| 目的 研究拉伸载荷下镀镍石墨烯/钛复合材料界面的应力-应变行为。方法 采用分子动力学模拟方法，建立了镀镍石墨烯/钛复合材料界面的单晶模型，研究了不同方向拉伸载荷下材料的力学行为。结果 镀镍石墨烯复合材料的力学性能随着镀层厚度的增大而提高，镀层镍可以作为位错源使复合材料的位错密度提高，镀层镍塑性变形的滞后使镀镍石墨烯/钛复合材料具有更高的塑性变形能力。结论 材料的力学性能更多依赖于镀镍层数，随着镀层厚度的增大，镀镍石墨烯/钛复合材料表现出了更高的抗拉强度，但界面处的裂纹和空洞数量也有所增加，材料的延伸率有所下降。 |
| 英文摘要: |
| The work aims to study the stress-strain behavior of nickel-plated graphene/titanium based composite interfaces under tensile load. In this paper, a single crystal model of the nickel-plated graphene/titanium composite interface was established by molecular dynamics simulation. The mechanical behavior of the material under tensile loading in different directions was studied. The simulation results showed that the mechanical properties of nickel-plated graphene composites increased with the increase of plating thickness. The dislocation density of nickel-plated composites could be increased by the nickel plating which was used as a dislocation source. The nickel-plated graphene/titanium composites had higher plastic deformation capacity due to the plastic deformation hysteresis of the nickel in the plating. The mechanical properties of the material depend more on the number of nickel plating layers. With the increase of plating thickness, nickel-plated graphene/titanium composites exhibit higher tensile strength, but the number of cracks and voids at the interface also increases, and the elongation of the material decreases. |
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