5083铝合金表面化学镀Ni-P镀层的力学性能

发布时间：2018-04-17 05:23

本文选题：Ni-P非晶薄膜 + 纳米压痕　；参考：《东北大学学报(自然科学版)》2015年03期

【摘要】：采用化学镀方法在5083铝合金基体上制备了Ni-P非晶薄膜,采用纳米压痕技术在不同应变速率下研究Ni-P非晶薄膜的硬度、弹性模量和变形行为.结果表明,Ni-P非晶薄膜硬度不是一个恒定值,与纳米压痕的压入深度有关,而弹性模量基本保持不变;载荷-深度曲线出现跳跃及台阶现象与应变速率有关,应变速率愈慢,曲线出现台阶现象越明显;跳跃台阶源于单个剪切带的开动,而在高的应变速率条件下,由于多个剪切带的开动,曲线上便不出现跳跃台阶.
[Abstract]:Ni-P amorphous films were prepared on 5083 aluminum alloy substrates by electroless plating. The hardness, elastic modulus and deformation behavior of Ni-P amorphous films were studied by nano-indentation technique at different strain rates.The results show that the hardness of Ni-P amorphous films is not a constant value, which is related to the indentation depth of nanocrystalline indentation, while the elastic modulus is almost unchanged, the jump of load-depth curve and the step phenomenon are related to the strain rate, and the strain rate is slower.The more obvious the phenomenon of steps in the curve is, the more obvious the jump step is from the moving of a single shear band, but under the condition of high strain rate, there are no jump steps on the curve due to the moving of multiple shear bands.
【作者单位】：东北大学材料各项异性与织构教育部重点实验室;
【基金】：国家自然科学基金资助项目(51171045,51371047)
【分类号】：TG174.4

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