梯度结构对Mo改性层接触应力的影响

Influence of Gradient Structure on Contact Stress of Mo Modified Layer

采用有限元法分析了在球形压头和维氏压头压入试验中304不锈钢表面形成的Mo梯度改性层的接触应力分布,并与304不锈钢基体和同等厚度的均质Mo膜进行对比。结果表明,改性层和膜层在压入过程中均承担了大部分应力,对基材起到了良好的保护作用。梯度结构相对于Mo薄膜能明显减缓接触应力,显示出更好的抵抗接触损伤的能力。

The contact stress distributions of Mo gradient gradification layer formed on the 304 stainless steel under indentation test with sphere and Vickers indenters were analyzed by finite element method, which were compared with 304 stainless steel substrate and same thickness homogeneous Mo-film. The results show that the graded modified layers and Mo-film undertake amounts of contact stress during pressing, which can play a protection role in the substrate. Compared with Mo-film, the graded structure can reduce the contact stress significantly, which can show better resistances to contact damage.