1.1 本指南定义了术语，涵盖了进行微动疲劳试验和报告结果的一般要求。本文介绍了微动疲劳试验的一般类型，并对制定和实施微动疲劳试验程序提出了一些建议。 1.2 微动疲劳试验旨在确定机械和环境参数对金属材料微动疲劳行为的影响。本指南的目的不是确定一种装置或试样设计优于其他装置或试样设计，而是为微动疲劳装置的设计、校准和使用制定指南，并建议收集、记录和报告数据的方法。 1.3 形成微动疲劳裂纹的循环次数取决于疲劳试样和微动垫的材料、两者之间的接触几何形状以及施加载荷和位移的方法。与材料的磨损行为类似，重要的是将微动疲劳视为系统响应，而不是材料响应。由于这种依赖于系统的配置，各种材料组合的可量化比较应基于使用类似微动疲劳配置和材料偶的测试。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 微动疲劳试验用于确定几个微动参数对金属材料疲劳寿命的影响。 其中一些参数包括不同的材料、相对位移幅值、微动接触处的法向力、交变切向力、接触几何形状、表面完整性参数（如光洁度）和环境。比较试验用于确定缓蚀剂对具有良好控制边界条件的试样疲劳寿命的有效性，以便可以模拟微动疲劳试验的力学。通常，比较微动疲劳响应与普通疲劳以获得微动疲劳的击倒或折减系数是有用的。结果可作为选择材料组合、设计应力水平、润滑剂和涂层的指南，以缓解或消除新设计或现有设计中的微动疲劳问题。 然而，由于疲劳、磨损和腐蚀对微动疲劳参数的协同作用，在判断试验条件是否满足设计或系统条件时应格外小心。 4.2 为了使数据在实验室之间具有可比性、可再现性和相关性，并与应用中的微动模拟相关，需要复制对所述材料的微动疲劳寿命至关重要的所有参数。由于环境、冶金性能、微动载荷（受控力和位移）、测试系统的符合性等的变化会影响响应，因此没有通用指南可定量确定单个参数变化时对试样微动疲劳寿命的影响。 为了确保测试结果可以相互关联和复制，所有材料变量、测试信息、物理程序和分析程序的报告方式应与当前良好的测试实践相一致。 4.3 由于涉及微动的磨损现象，只有在试验开始时才存在计算微动接触面积和压力的理想接触条件。虽然仍然可以使用初始接触面积计算平均微动压力，但接触面积内的压力可能会发生很大变化。 4.4 当试验条件充分模拟设计使用条件时，微动疲劳试验的结果可能适用于设计。

1.1 This guide defines terminology and covers general requirements for conducting fretting fatigue tests and reporting the results. It describes the general types of fretting fatigue tests and provides some suggestions on developing and conducting fretting fatigue test programs. 1.2 Fretting fatigue tests are designed to determine the effects of mechanical and environmental parameters on the fretting fatigue behavior of metallic materials. This guide is not intended to establish preference of one apparatus or specimen design over others, but will establish guidelines for adherence in the design, calibration, and use of fretting fatigue apparatus and recommend the means to collect, record, and reporting of the data. 1.3 The number of cycles to form a fretting fatigue crack is dependent on both the material of the fatigue specimen and fretting pad, the geometry of contact between the two, and the method by which the loading and displacement are imposed. Similar to wear behavior of materials, it is important to consider fretting fatigue as a system response, instead of a material response. Because of this dependency on the configuration of the system, quantifiable comparisons of various material combinations should be based on tests using similar fretting fatigue configurations and material couples. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Fretting fatigue tests are used to determine the effects of several fretting parameters on the fatigue lives of metallic materials. Some of these parameters include differing materials, relative displacement amplitudes, normal force at the fretting contact, alternating tangential force, the contact geometry, surface integrity parameters such as finish, and the environment. Comparative tests are used to determine the effectiveness of palliatives on the fatigue life of specimens with well-controlled boundary conditions so that the mechanics of the fretting fatigue test can be modeled. Generally, it is useful to compare the fretting fatigue response to plain fatigue to obtain knockdown or reduction factors from fretting fatigue. The results may be used as a guide in selecting material combinations, design stress levels, lubricants, and coatings to alleviate or eliminate fretting fatigue concerns in new or existing designs. However, due to the synergisms of fatigue, wear, and corrosion on the fretting fatigue parameters, extreme care should be exercised in the judgment to determine if the test conditions meet the design or system conditions. 4.2 For data to be comparable, reproducible, and correlated amongst laboratories and relevant to mimic fretting in an application, all parameters critical to the fretting fatigue life of the material in question will need to be replicated. Because alterations in environment, metallurgical properties, fretting loading (controlled forces and displacements), compliance of the test system, etc. can affect the response, no general guidelines exist to quantitatively ascertain what the effect will be on the specimen fretting fatigue life if a single parameter is varied. To assure test results can be correlated and reproduced, all material variables, testing information, physical procedures, and analytical procedures should be reported in a manner that is consistent with good current test practices. 4.3 Because of the wear phenomenon involved in fretting, idealized contact conditions from which the fretting contact area and pressure may be calculated exist only at the onset of the test. Although it is still possible to calculate an average fretting pressure using the initial contact area, the pressure within the contact area may vary considerably. 4.4 Results of the fretting fatigue tests may be suitable for application to design when the test conditions adequately mimic the design service conditions.