2024铝合金表面熨压强化的研究

Study on surface burnishing strengthening of 2024 aluminum alloy

本研究过纳米硬度、光学显微镜、透射电镜、以及X射线衍射,研究了对表面施加熨压加工后,2024铝合金的硬度和微观组织的变化及影响机理。试验结果表明,通过熨压加工能够制备纳米尺度的微观组织,并显著增加晶界和位错密度,从而大幅提升熨压表面的硬度。本文对于未来超强纳米铝合金材料的设计具有参考意义。

In this study, nano-hardness, optical microscopy, transmission electron microscopy, and X-ray diffraction were used to study the evolution and influence mechanism of hardness and microstructure of 2024 aluminum alloy after surface burnishing. The results show that the nano-scale microstructure can be obtained by burnishing, and the grain boundaries densities and dislocation densities are significantly increased, thereby greatly increasing the hardness of the burnished surface. This paper has certain reference significance for the design and processing of super strong nano-aluminum.