Wear resistance and tribological features of pure aluminum and Al-Al2O3 composites consolidated by high-pressure torsion
Wear resistance and tribological features of pure aluminum and Al-Al2O3 composites consolidated by high-pressure torsion
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DOI：
10.1016/j.wear.2013.12.022
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发表时间：
2014-02-15
期刊：
影响因子：
5
通讯作者：
Kato, Hirotaka
中科院分区：
文献类型：
--
作者：
Edalati, Kaveh;Ashida, Maki;Kato, Hirotaka
采用高压扭转冷固结法制备了超细晶纯Al和Al_2 O_3含量分别为10和20%的Al基复合材料。球-盘耐磨性的铝HPT相比，其粗晶对应物处理与H24处理（冷轧，然后低温退火）。Al基体中添加Al 2 O3后，磨损宽度减小，磨损深度和磨损体积增大。Al和Al-Al_2 O_3复合材料的磨损机制主要是粘着磨损。结果表明，磨损宽度的变化可以用载荷/硬度比的唯一函数来表示，与Reye假说以及霍尔姆和Archard关系式一致。然而，磨损深度的变化与硬度的变化不一致。(C)2013爱思唯尔有限公司版权所有。
Ultrafine-grained pure Al and AI-based composites with 10 and 20 vol% of Al2O3 were produced by cold consolidation of powders using high-pressure torsion (HPT). Ball-on-disc wear resistance of Al was improved by HPT when compared to its coarse-grained counterpart processed with H24 treatment (cold rolling followed by low-temperature annealing). Wear width decreased but wear depth and wear volume increased with the addition of Al2O3 to the Al matrix. The wear mechanism was mainly due to adhesion in Al and Al-Al2O3 composites. It was found that the variation of wear width can be represented by a unique function of the ratio of load/hardness in consistency with the Reye's hypothesis and the Holm and Archard relationships. However, the variation of wear depth was inconsistent with the hardness variations. (C) 2013 Elsevier B.V. All rights reserved.