Application of Submicromechanical Diagnostics for Characterization of Glass-Filled Polyamide Composites

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL Journal of Friction and Wear Pub Date : 2023-02-15 DOI:10.3103/S1068366622050087

M. Pashechko, S. Shil’ko, M. Czerniec, J. Borc, Ya. Chabanyuk

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Abstract—

The tribomechanical properties of PA6-L-SV30-1 polyamide composites dispersed dopped glass fibers, which are promising for the manufacture of metal–polymer bearings, gears, and other products, have been studied. The characteristics of their wear resistance under conditions of sliding friction without lubrication are determined depending on the specific loads, at a certain sliding speed and test time. The absolute values of the micromechanical characteristics of the surface layer important for tribomaterial science before and after friction are given: the work of elastic A_el and plastic A_pl deformation, relaxation ability, plasticity coefficient, Young’s modulus, microhardness HV at a given penetration depth of the indenter and the microstructure of the scratch-tested layer. Diagrams of changes in loads, kinetic diagrams of microindentation are constructed, the nature of the change in the penetration depth of P_d and the recovery of R_d of the indenter during scratch testing of polyamide composites is illustrated. The scientifical significance of the suggested approach consists in triboanalysis carried out on two (macroscopic and microscopic) scale levels allowing to obtain new data about the stability of the structure and properties of subsurface layers of tribopairs. Its practical significance specifies the possibility of development refined engineering methods of calculation of stress-strain state, strength, contact stiffness, wear resistance, and durability of tribojoints made of composite materials.

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亚微力学诊断在玻璃填充聚酰胺复合材料表征中的应用

摘要:研究了PA6-L-SV30-1分散掺杂玻璃纤维聚酰胺复合材料的摩擦力学性能，该材料有望用于金属-聚合物轴承、齿轮等产品的制造。其在无润滑滑动摩擦条件下的耐磨性特性取决于特定载荷、一定滑动速度和试验时间。给出了摩擦前后对摩擦材料学有重要意义的表层微观力学特性的绝对值:在一定的压头穿透深度下，弹性和塑性的变形功、松弛能力、塑性系数、杨氏模量、显微硬度HV以及被试层的显微组织。构建了载荷变动图、微压痕动力学图，阐明了聚酰胺复合材料划伤试验中压头Pd穿透深度变化和Rd回收量变化的本质。所建议的方法的科学意义在于在两个(宏观和微观)尺度上进行摩擦分析，从而获得有关摩擦对次表层结构和性能稳定性的新数据。其实际意义说明了发展复合材料摩擦接头应力-应变状态、强度、接触刚度、耐磨性和耐久性的精细工程计算方法的可能性。

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.