Effect of Er on microstructure and wear properties of Al-Zn-Mg alloy

doi:10.13251/j.issn.0254-6051.2023.01.002

Abstract

Abstract: Effect of Er on microstructure and mechanical properties of Al-Zn-Mg alloy as well as the wear behavior of the alloy under different loads were studied by means of scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and material surface comprehensive tester. The results show that with the addition of Er, the elongation of the alloy is increased by about 30% and the grain size is significantly refined as the average grain size reduces by about 68%. The alloy experiences two stages of running-in and stable wear during wear process, and the wear factor curves fluctuate with the increasing of load. The enrichment of O element in the tribolayer indicates the oxidation wear mechanism. Under the load of 30 N, the wear mechanism is mixed up by the abrasive wear, fatigue wear and adhesive wear. Under the load of 70 N, the wear mechanism was mainly the abrasive wear with fatigue wear, and the wear loss is reduced due to the decrease of surface delamination of the alloy with the addition of Er.

Key words: microalloying, Al-Zn-Mg alloy, friction and wear, wear stage, frictional layer, wear mechanism

CLC Number:

TG146.21

Ding Xuxu, Wu Xiaolan, Wang Wei, Rao Mao, Mao Xuejing, Gao Kunyuan, Wei Wu, Huang Hui. Effect of Er on microstructure and wear properties of Al-Zn-Mg alloy[J]. Heat Treatment of Metals, 2023, 48(1): 6-11.

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