CRACKS DEVELOPMENT FORMED AS A RESULT OF CYCLIC MICRO-IMPACTS ON THE SURFACE OF ANTI-WEAR COATINGS

Q3 Engineering
Jolanta Krupa, S. Zimowski
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引用次数: 0

Abstract

Fatigue tests are commonly used to define the mechanical properties of materials intended for responsible components operating in various conditions. The fatigue strength of monolithic materials is most often determined during bending, tensile, compression, or torsion tests. The growing area of thin, hard coatings application forced the researchers to extend the fatigue tests to the coating-substrate systems. Since the behaviour of complex, modern materials are not subject to general rules, it is necessary to conduct investigation and analyses and generalise the results of these tests for given groups of materials. In this article, microimpact fatigue tests were performed to analyse the behaviour of single- and double-layer chromium and chromium nitride coatings. The microhardness and elastic modulus obtained by an indentation method were used to determine the influence of mechanical properties of the coatings on their fatigue wear. After the fatigue tests, the deformation of the coating/substrate system was examined, taking into account the geometry of the craters, and the forms of coating wear caused mainly by cracking were analysed.
抗磨涂层表面的微循环冲击形成裂纹
疲劳试验通常用于确定在各种条件下工作的负责部件的材料的机械性能。整体材料的疲劳强度通常是在弯曲、拉伸、压缩或扭转试验中确定的。随着薄、硬涂层应用领域的不断扩大,研究人员不得不将疲劳试验扩展到涂层-基体系统。由于复杂的现代材料的行为不受一般规则的约束,因此有必要对给定材料组进行调查和分析并推广这些测试的结果。本文通过微冲击疲劳试验分析了单层和双层铬和氮化铬涂层的性能。采用压痕法测定涂层的显微硬度和弹性模量,确定涂层力学性能对疲劳磨损的影响。疲劳试验结束后,考虑弹坑的几何形状,分析了涂层/基体系统的变形,并分析了主要由裂纹引起的涂层磨损形式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Tribologia: Finnish Journal of Tribology
Tribologia: Finnish Journal of Tribology Materials Science-Surfaces, Coatings and Films
CiteScore
2.20
自引率
0.00%
发文量
4
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