2026-10-12T02:09:22Z https://www.scidb.cn/oai

10.57760/sciencedb.39325 2026-06-11T15:23:25Z

2026-06-11 Analysis on High-Temperature Tangential Fretting Wear Behaviour of 2A70 Aluminum Alloy doi:10.57760/sciencedb.39325 en High temperature is a key factor affecting the service life of centrifugal impellers. In this paper, 2A70 aluminum alloy, a centrifugal impeller material, was selected as the research object, and the fretting wear characteristics of 2A70 aluminum alloy at different temperatures (25 ℃, 100 ℃, 175 ℃, 250 ℃) were studied. The micro-morphology, tribological chemical state and main damage mechanism of the fretting wear in the slip regime (50 μm) were mainly discussed. The result demonstrated that in the same load and displacement conditions, the fretting regime was not modified by raising the temperature, but it has a significant influence on the friction coefficient, frictional dissipation energy and fretting wear mechanism. In the high temperature conditions, the material damage degree of 2A70 aluminum alloy is higher than that in the room temperature, the fretting wear mechanism includes abrasive wear, adhesive wear and oxidative wear. With temperature increasing, the friction coefficient and wear volume ascended at first and then descended with increasing temperature. When the temperatures reach 100 ℃ and 175 ℃, due to the influence of high temperature thermal softening, the deformation resistance of the material is reduced and the fretting damage is intensified. When the temperature reaches 250 ℃, the oxide debris layer can form at a lower number of cycles, reducing the contact area between friction pair and alleviating the material abrasion. 2A70 aluminum alloy; tangential fretting wear; high-temperature oxidation; damage mechanism; debris behaviour Zhou Junhao Chu Zhaolong Li Bo Zhao Yiguang Tian Pinghua Peng Jinfang Ren Yu Zhu Minhao PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank