The role of fracture toughness in the wear of metals
The role of fracture toughness in the wear of metals
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DOI：
10.1016/0043-1648(75)90280-x
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发表时间：
1975-07
期刊：
影响因子：
5
通讯作者：
E. Hornbogen
中科院分区：
文献类型：
--
作者：
E. Hornbogen
提出了一个模型来解释金属材料的相对磨损率随着韧性的降低而增加。它是基于在粗糙相互作用期间发生的应变与裂纹扩展开始的临界应变的比较。当外加应变小于临界应变时，磨损速率与韧性无关，符合阿卡德定律。施加的应变大于材料的临界应变会导致裂纹扩展的可能性增加，从而导致更高的磨损率。过渡到增加的磨损率（范围I→II）取决于特定磨损实验的条件，例如压力、应变速率、撞击角和材料的性能。在范围I，磨损系数恒定在最小值，耐磨性与硬度成正比增加。范围II的磨损率可以增加（小于范围I），与硬度无关，或随硬度降低，取决于特定的韧性
A model is proposed to explain increasing relative wear rates with decreasing toughness of metallic materials. It is based on the comparison of the strain that occurs during asperity interactions with the critical strain at which crack growth is initiated. If the applied strain is smaller than the critical strain, the wear rate is independent of toughness and Archard's law is followed. Applied strain larger than the critical strain of the material lead to an increased probability of crack growth and therefore to a higher wear rate. The transition to an increased wear rate (Ranges I → II) depends on the conditions of the particular wear experiment, for example, pressure, strain rate, impingement angle, and on the properties of the material. In Range I the wear coefficient is constant at the minimum value, wear resistance increases proportional to hardness. Wear rate in Range II can increase (less than in Range I), be independent of, or decrease with hardness depending on the particular toughness