Unlubricated Sliding Behavior of Metals
Unlubricated Sliding Behavior of Metals
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DOI：
10.1557/s0883769400030608
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发表时间：
1998-06
期刊：
影响因子：
5
通讯作者：
D. Rigney;J. Hammerberg
中科院分区：
文献类型：
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作者：
D. Rigney;J. Hammerberg
科学家和工程师们仍然在争论粗糙度和凹凸不平的联锁，粘附力和原子间力，以及摩擦现象中的弹性和塑性变形的相对贡献。然而，一致的中心点确实存在：摩擦涉及能量耗散，或机械功转化为热。因此，在材料的滑动相互作用中，任何允许这种能量耗散的机制都值得考虑，无论它是严格地发生在名义滑动界面上，还是发生在距离该界面一定距离的材料内。如果相互作用限于原子距离，则完全可以将注意力集中在两个表面的原子上（参见M.O. Robbins和J. Krim和J.A.哈里森和S. S.佩里在这个问题上）。摩擦是一种表面现象。然而，如果滑动条件导致广泛的塑性变形的材料-在距离容易检测的眼睛或光学显微镜-然后相关的能量耗散可能占大多数的摩擦损失。在这种情况下，摩擦涉及的不仅仅是表面发生的过程。
Scientists and engineers still debate the relative contributions of roughness and interlocking of asperities, adhesion and interatomic forces, and elastic and plastic deformation in friction phenomena. However a central point of agreement does exist: Friction involves energy dissipation, or the conversion of mechanical work into heat. Therefore any mechanism that allows for this energy dissipation during sliding interactions of materials deserves consideration, whether it occurs strictly at the nominal sliding interface or within material at some distance from that interface.If the interactions are limited to atomic distances, it is entirely appropriate to focus attention on atoms at the two surfaces (see the articles by M.O. Robbins and J. Krim and J.A. Harrison and S.S. Perry in this issue). Friction is then a surface phenomenon. However if the sliding conditions lead to extensive plastic deformation of either material—over distances readily detectable by eye or by optical microscopy—then the associated energy dissipation is likely to account for most of the frictional losses. In such cases, friction involves more than processes occurring at the surface.