固溶和时效处理对碳纳米管/2024铝合金复合材料组织和性能的影响

Effects of solution and aging treatments on the organization and properties of carbon nanotubes/2024 aluminum alloy composites

对碳纳米管/2024铝合金复合材料进行固溶和时效处理,通过维氏硬度和室温拉伸实验测试了复合材料的性能,对固溶和时效处理后复合材料的微观组织和析出相进行了表征。研究发现,复合材料的强塑性与固溶和时效处理密切相关,碳纳米管/2024铝合金复合材料经530℃×4 h固溶处理后维氏硬度达到最高,为179.45,较原始复合材料维氏硬度提高约31%。时效处理后加速了时效硬化行为,经130℃×4 h时效处理后复合材料的抗拉强度、屈服强度和伸长率最高,分别为430.4 MPa,606.1 MPa和9.5%。结果表明,碳纳米管/2024铝合金复合材料适宜的固溶和时效制度为:固溶处理530℃×4 h,时效处理130℃×4 h。

The carbon nanotubes/2024 aluminum alloy composites were conducted by solution and aging treatments.The properties of the composites were evaluated by Vickers hardness and room temperature tensile tests,and the microstructures and precipitated phases of the composites after solution and aging treatments were characterized.It was found that the strength and plasticity of the composites were closely related to the solution and aging treatments.The Vickers hardness of the carbon nanotubes/2024 aluminum alloy composites reached the highest value of 179.45 after solution treatment at 530°C for 4 h,which was about 31%higher than the original composites.The aging treatment accelerated the agehardening behavior,and the composites aged at 130°C for 4 h showed the highest tensile strength,yield strength and the highest elongation,i.e.430.4 MPa,606.1 MPa and 9.5%,respectively.The results show that the optimal treatment for the carbon nanotubes/2024 aluminum alloy composites can be achieved at 530°C for 4 h by solution treatment and at 130°C for 4 h by aging treatment.