Fretting wear behavior of superelastic nickel titanium shape memory alloy
Fretting wear behavior of superelastic nickel titanium shape memory alloy
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DOI：
10.1007/s11249-005-3606-9
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发表时间：
2005-04
影响因子：
3.2
通讯作者：
L. Qian;Q. Sun;Zhongrong Zhou
中科院分区：
文献类型：
--
作者：
L. Qian;Q. Sun;Zhongrong Zhou
在伺服液压动态试验机上研究了超弹性镍钛形状记忆合金在不同位移幅值下的微动行为。结果表明，材料的超弹性性能对NiTi合金良好的微动性能起着关键作用。由于NiTi具有较低的相变应力(仅为塑性屈服应力的1/4)和较大的可回复相变应变(5%)，在相同的微动条件下，NiTi/GCr15不锈钢副的摩擦力小于GCr15/GCr15，同时NiTi板的Rabinowicz磨损系数约为GCr15板的1/9。对于NiTi/GCr15摩擦副，即使NiTi的硬度远低于GCr15，但超弹性NiTi合金的微动磨损性能优于GCr15钢。结果表明，在部分滑移区，弱犁削是NiTi合金的主要磨损机制。而在混合区和粗滑移区，NiTi的磨损主要是GCr15磨粒在三体磨损模式下的磨粒磨损。
The fretting behavior of superelastic nickel titanium (NiTi) shape memory alloy was studied at various displacement amplitudes on a serve-hydraulic dynamic test machine. The results showed that the superelastic properties of the material played a key role in the observed excellent fretting behavior of NiTi alloy. Due to the low phase transition stress (only 1/4 the value of its plastic yield stress) and the large recoverable phase transition strain (5%) of NiTi, the friction force of NiTi/GCr15 stainless steel pair is smaller than the value of GCr15/GCr15 pair and at the same time the Rabinowicz wear coefficient of NiTi plate is about 1/9 the value of GCr15 plate under the same fretting conditions. For NiTi/GCr15 pair, even NiTi has a much lower hardness than GCr15, the superelastic NiTi alloy exhibits superior fretting wear property than GCr15 steel. It was found that the weak ploughing was the main wear mechanism of NiTi alloy in the partial slip regime. While in the mixed regime and gross slip regime, the wear of NiTi was mainly caused by the abrasive wear of the GCr15 debris in the three-body wear mode.