Abstract

The effect of equal channel angular extrusion (ECAE) with route A on the wear resistance of sintered Al–Sn alloys has been studied in this work. The tribological tests were carried out according to the “pin-on-disk” scheme without liquid lubrication. It was established that multiple processing by this method leads to the strengthening of the aluminum matrix and the formation of a structure with alternating Al and Sn layers which is favorable for the self-lubrication process. The wear resistance of the sintered Al–Sn alloys is increased as a result. However, the number of ECAE passes should be limited to two to three because a fragmentation of thin tin interlayers and destruction of the layered structure take place after large number of the passes.

中文翻译：

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严重塑性变形对烧结铝-锡合金干摩擦磨损性能的影响

摘要

在这项工作中，研究了路径A的等通道角挤压（ECAE）对烧结的Al-Sn合金耐磨性的影响。摩擦测试是根据“针盘式”方案进行的，没有进行液体润滑。已经确定，通过这种方法的多次处理导致铝基体的强化以及形成具有交替的Al和Sn层的结构，这对于自润滑过程是有利的。结果，增加了烧结Al-Sn合金的耐磨性。但是，ECAE通过的次数应限制为2到3，因为在多次通过之后会发生薄锡夹层的碎裂和层状结构的破坏。