Peña J, Solano E, Mendoza A, Casals J, Planell J A, Gil F J
Dept. Ciencia de Materiales e Ingeniería Metalúrgica, E.T.S.E.I.B., Universidad Politécnica de Cataluña, Diagonal 647, 08028-Barcelona, Spain.
Biomed Mater Eng. 2005;15(4):289-93.
The main objective of this work has been the characterisation and correlation of the wear behaviour of the NiTi shape memory alloys in their different phases. The weight losses for the different alloys in function of the present phase, and of the M(s) transformation temperature are studied. Adhesive wear tests, Pin-on-Disk, according to the ASTM-G99 standard have been carried out. The thermoelastic martensitic transformations that cause the super-elastic effect, the reorientation and coalescence of martensitic plates and the damping effect promotes a high ability to accommodate large deformations without generating permanent damages that causes the wear. The resulting plastic deformation may be accumulated during wear process without generating fracture. The results show that the wear resistance is mainly dependent of the M(s) transformation temperature for both alloys. For the NiTi alloys also the Ni atomic percentage and the hardness of the alloys are important parameters in the wear behavior.
这项工作的主要目标是对镍钛形状记忆合金在不同相中的磨损行为进行表征和关联。研究了不同合金在当前相以及Ms转变温度作用下的重量损失。根据ASTM-G99标准进行了销盘式粘着磨损试验。引起超弹性效应的热弹性马氏体转变、马氏体板的重新取向和聚结以及阻尼效应促进了在不产生导致磨损的永久损伤的情况下适应大变形的高能力。由此产生的塑性变形可能在磨损过程中积累而不产生断裂。结果表明，两种合金的耐磨性主要取决于Ms转变温度。对于镍钛合金，镍原子百分比和合金硬度也是磨损行为的重要参数。
