Research on self-healing characteristic and state prediction method of the copper based powder metallurgy materials on friction interface

IF 2 3区材料科学 Q2 ENGINEERING, MECHANICAL

Surface Topography: Metrology and Properties Pub Date : 2024-05-09 DOI:10.1088/2051-672x/ad44b7

Jianpeng Wu, Chengbing Yang, Wenya Shu, Yuxin Wang, Liyong Wang

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引用次数: 0

Abstract

In high power density transmission systems, the friction and wear characteristic of copper based powder metallurgy materials is directly linked to working reliability. Moreover, these materials have frictional self-healing characteristic at the material interface. This paper focuses on exploring the healing mechanism of copper based powder metallurgy materials and conducts ‘damage-healing’ tests, proposing a method to characterize the self-healing characteristic. Subsequently, through comparative tests, the influence of temperature, speed, and pressure on the self-healing characteristics is analyzed. The results show that the increase in temperature reduces the furrow width and depth by 15.30% and 59.76%, respectively. Pressure has the greatest effect on surface roughness, reducing it by 67%. Meanwhile, this paper developed a PSO (Particle Swarm Optimization)-LSTM (Long Short-Term Memory) method to accurately predict the self-healing characterization parameters and self-healing time with small error (average 4.35%) and high correlation coefficient (R ²) (average 0.976). This study contributes to the development of interface repair technology for friction materials.

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摩擦界面铜基粉末冶金材料的自修复特性及状态预测方法研究

在高功率密度传动系统中，铜基粉末冶金材料的摩擦和磨损特性直接关系到工作可靠性。此外，这些材料在材料界面上具有摩擦自愈合特性。本文重点探讨了铜基粉末冶金材料的愈合机理，并进行了 "损伤愈合 "试验，提出了表征自愈合特性的方法。随后，通过对比试验，分析了温度、速度和压力对自愈合特性的影响。结果表明，温度升高会使沟宽和沟深分别减少 15.30% 和 59.76%。压力对表面粗糙度的影响最大，降低了 67%。同时，本文开发了一种 PSO（粒子群优化）-LSTM（长短期记忆）方法，可准确预测自愈表征参数和自愈时间，误差小（平均为 4.35%），相关系数（R2）高（平均为 0.976）。这项研究有助于摩擦材料界面修复技术的发展。

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来源期刊

Surface Topography: Metrology and Properties Materials Science-Materials Chemistry

CiteScore

4.10

自引率

22.20%

发文量

183

期刊介绍： An international forum for academics, industrialists and engineers to publish the latest research in surface topography measurement and characterisation, instrumentation development and the properties of surfaces.