Fe-Mn-Si基形状记忆合金耐磨性的研究

Study on the Wearing Resistance of Fe-Mn-Si Based Shape Memory Alloy

通过滑动摩擦磨损试验研究了一种Fe-Mn-Si基形状记忆合金的耐磨性,并借助扫描电镜(SEM)观察,X射线衍射(XRD)等手段研究了其摩擦磨损过程的相变机制.研究发现油摩擦时,Fe-Mn-Si基形状记忆合金具有良好的耐磨性,磨损机制为磨粒磨损.XRD分析和SEM观察表明,油摩擦时Fe-Mn-Si基记忆合金可通过应力诱发→马氏体相变及其相变伪弹性降低应力集中,抑制塑性滑移变形,避免微裂纹的形成和扩展提高其耐磨性.

The wearing resistance of one kind of Fe-Mn-Si based shape memory alloy is studied by sliding friction test and electron scanning microscope （SEM）, X-ray diffraction （XRD） etc according to which the phase-transformations and their micromechanisms of the tested alloy can be observed. It＇s found that the Fe-Mn-Si based shape memory alloy takes on excellent friction wearing resistance in oily friction with abrasive wear mechanism. It is known from XRD and SEM that stress-induced γ→ε martensitic phase transformation and its phase transformation pseudoelasticity in Fe-Mn-Si based shape memory alloy can improve its wearing resistance in oily friction by reducing crack-tip stress, restraining plastic sliding deformation and delaying the formation and extension of microcracks.