Chan Kwai S, Koike Marie, Okabe Toru
Southwest Research Institute, San Antonio, TX 78238, USA.
Acta Biomater. 2007 May;3(3):383-9. doi: 10.1016/j.actbio.2006.10.007. Epub 2007 Jan 16.
The wear behavior of Ti-based alloys was analyzed by considering the elastic-plastic fracture of individual alloys in response to the relevant contact stress field. Using the contact stresses as the process driving force, wear was computed as the wear rate or volume loss as a function of hardness and tensile ductility for Ti-based cast alloys containing an alpha, alpha+beta or beta microstructure with or without the intermetallic precipitates. Model predictions indicated that wear of Ti alloys increases with increasing hardness but with decreasing fracture toughness or tensile ductility. The theoretical results are compared with experimental data to elucidate the roles of microstructure in wear and contrasted against those in grindability.
通过考虑各合金在相关接触应力场作用下的弹塑性断裂，分析了钛基合金的磨损行为。以接触应力作为过程驱动力，计算了含α、α+β或β微观结构且有或无金属间析出相的钛基铸造合金的磨损率或体积损失，磨损率或体积损失是硬度和拉伸延展性的函数。模型预测表明，钛合金的磨损随硬度增加而增加，但随断裂韧性或拉伸延展性降低而增加。将理论结果与实验数据进行比较，以阐明微观结构在磨损中的作用，并与可磨性中的作用进行对比。
