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| 异步轧制对AZ31B镁/1060铝复合板微观结构特征及性能的影响 |
| Effect of Asymmetric Rolling on Microstructural Characteristics and Properties of AZ31B Mg/1060 Al Composite Plates |
| Received:May 28, 2024 |
| DOI：10.3969/j.issn.1674-6457.2025.02.005 |
| 中文关键词: 异步轧制 AZ31B镁/1060铝复合板 微观组织 机理 |
| 英文关键词: asymmetric rolling AZ31B Mg/1060 Al composite plate microstructure mechanism |
| 基金项目:国家自然科学基金(51808507) |
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| 中文摘要: |
| 目的 研究镁/铝复合板界面结合质量与微观结构特征的关系。方法 采用异步轧制的方法制备了AZ31B镁/1060铝复合板，通过与同步轧制进行对比，研究并揭示了异步轧制对AZ31B镁/1060铝复合板界面微观结构特征和力学性能的影响规律及机理。结果 通过对比AZ31B镁/1060铝复合板界面的晶粒细化程度可以发现，异步轧制可以更有效地使界面产生强烈的塑性变形，其中镁侧晶粒细化程度提高了54.63%，铝侧晶粒细化程度提高了2倍以上，这为AZ31B镁/1060铝复合板的冶金结合提供了必要的形变储能。同时还发现，相较于传统轧制制备的AZ31B镁/1060铝复合板，异步轧制制备的复合板的元素扩散层厚度提高了42.13%，并且由于较高的形变储能以及绝热温升，界面生成了Mg2Al3金属间化合物。结论 冶金结合程度的提高以及金属间化合物带来的更好的机械啮合效果，进一步对界面进行了强化，使AZ31B镁/1060铝复合板的界面结合强度提高了70.69%。异步轧制可以使界面产生更强烈的塑性变形进而提高AZ31B镁/1060铝复合板的界面结合质量，为高质量AZ31B镁/1060铝复合板的制备提供了理论依据。 |
| 英文摘要: |
| The work aims to study the relationship between the interface bonding quality and the microstructural characteristics of the Mg/Al composite plate. AZ31B Mg/1060 Al composite plate was prepared by asymmetric rolling method, and the effect of asymmetric rolling on the microstructural characteristics and mechanical properties of the interface in AZ31B Mg/1060 Al composite plate was investigated and revealed through comparison with symmetric rolling. By comparing the degree of grain refinement at the interface of AZ31B Mg/1060 Al composite plate, it was found that asymmetric rolling could more effectively bring strong plastic deformation to the interface, in which the degree of grain refinement on the side of Mg increased by 54.63%, and the degree of grain size refinement on the side of Al increased by more than two times, providing the necessary deformation energy storage for the metallurgical bonding of AZ31B Mg/1060 Al composite plate. It was also found that the thickness of the elemental diffusion layer of the AZ31B Mg/1060 Al composite plate prepared by asymmetric rolling increased by 42.13%, and Mg2Al3 intermetallic compounds were generated at the interface due to the high deformation energy storage and the adiabatic temperature rise.The increased degree of metallurgical bonding and the better mechanical locking effect due to the intermetallic compounds further strengthen the interface, resulting in a 70.69% increase in the interfacial bonding strength of the AZ31B Mg/1060 Al composite plate. The asymmetric rolling reveals that the interfacial bonding quality of AZ31B Mg/1060 Al composite plates can be improved by providing stronger plastic deformation for the interface, which provides a theoretical basis for the preparation of high-quality AZ31B Mg/1060 Al composite plates. |
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