Structural Changes and Diffusion in the Zone of Contact Deformation of Copper Alloys Under Friction

IF 0.6 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metal Science and Heat Treatment Pub Date : 2024-04-16 DOI:10.1007/s11041-024-01007-3

L. I. Kuksenova, V. I. Savenko

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Abstract

Calculation of diagrams of components of residual stress tensor arising in the surface layer of a tribomaterial under sliding friction is used to formulate ideas about the role of the medium in creating a plasticizing and strengthening triboeffect. The characteristics of the structural state of the surface layers of brasses, aluminum and tin bronzes during their friction against steel in surface-active lubricants are presented. The conditions for achieving minimum power losses to friction and wear are determined. The role of local diffusion phenomena in quasi-spinodal phase transitions observed in surface micro-volumes of copper alloys during their contact deformation is revealed. It is shown that among industrial copper alloys, brass of the L90 type, aluminum bronzes BrA5, BrA7, and tin bronzes BrOF4-0.25, BrOF6,5-0,15 have the greatest wear resistance in surface-active lubricants. Examples of implementation of the phenomenon of selective transfer in friction pairs are given. Recommendations are developed for its use in friction units of machines and devices.

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摩擦下铜合金接触变形区的结构变化与扩散

通过计算滑动摩擦下摩擦材料表层产生的残余应力张量的分量图，提出了介质在产生塑化和强化三重效应中的作用。介绍了黄铜、铝和锡青铜在表面活性润滑剂中与钢摩擦时表层结构状态的特点。确定了实现摩擦和磨损最小功率损失的条件。揭示了在铜合金接触变形过程中，在其表面微体积中观察到的准螺旋相变中局部扩散现象的作用。研究表明，在工业铜合金中，L90 型黄铜、铝青铜 BrA5、BrA7 和锡青铜 BrOF4-0.25、BrOF6,5-0,15 在表面活性润滑剂中的耐磨性最强。举例说明了摩擦副中选择性转移现象的应用。并就其在机器和设备摩擦单元中的应用提出了建议。

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来源期刊

Metal Science and Heat Treatment 工程技术-冶金工程

CiteScore

1.20

自引率

16.70%

发文量

102

审稿时长

4-8 weeks

期刊介绍： Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering. Topics covered include: New structural, high temperature, tool and precision steels; Cold-resistant, corrosion-resistant and radiation-resistant steels; Steels with rapid decline of induced properties; Alloys with shape memory effect; Bulk-amorphyzable metal alloys; Microcrystalline alloys; Nano materials and foam materials for medical use.