Fretting fatigue behaviour of Ni-free high-nitrogen stainless steel in a simulated body fluid

研究了无ni高氮钢（HNS）和冷轧SUS316L钢（SUS316L(CR)）在空气和磷酸盐缓冲盐水（PBS(-)）中的微动疲劳行为。HNS的平面疲劳极限低于SUS316L（CR）。在空气和PBS（-）中，HNS的微动疲劳极限均远高于SUS316L（CR）。结果表明，HNS在两种环境下的微动疲劳性能均优于SUS316L（CR）。微动对疲劳极限的影响不仅可以用微动的摩擦应力来解释，还可以用微动区域的磨损行为和/或塑性变形来解释。

Fretting fatigue behavior was studied in air and in phosphate-buffered saline(PBS(-)) for Ni-free high-nitrogen steel(HNS) and for cold-rolled SUS316L steel(SUS316L(CR)). The plain fatigue limit of HNS was lower than that of SUS316L(CR). The fretting fatigue limit of HNS was much higher than that of SUS316L(CR) in both air and PBS(-). It was revealed that HNS has much better fretting fatigue properties than SUS316L(CR) in both the environments. The influence of fretting on fatigue limit was not solely explained by friction stress of the fretting, but also by wear behavior and/or plastic deformation in the fretting region.