In this study, CoCrFeNiTi_0.5Al_x high-entropy alloys were produced by induction melting and their dry sliding wear behavior was examined at different temperatures. In addition to face-centered cubic (FCC) phases, low amounts of a tetragonal phase were detected in the microstructures of alloys without Al and microscratches were formed by wear particles on the worn surfaces of the alloy specimens. Two body-centered cubic (BCC) phases were detected in the alloy with 0.5Al and a fatigue-related extrusion wear mechanism was detected on the worn surface. The alloy specimen with a high Al content exhibited the best wear characteristics. No wear tracks were formed in single-phase BCC intermetallic alloys at room temperature and they exhibited a higher wear strength at high temperatures when compared to other samples.

中文翻译：

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CoCrFeNiTi 0.5 Al x高熵合金的高温干滑动行为分析

在这项研究中，CoCrFeNiTi _0.5 Al _x通过感应熔化生产高熵合金，并在不同温度下检查其干滑动磨损行为。除了面心立方（FCC）相以外，在不含Al的合金的微观结构中还检测到少量的四方相，并且合金试样的磨损表面上的磨损颗粒形成了微划痕。在含0.5 Al的合金中检测到两个体心立方（BCC）相，并且在磨损表面检测到疲劳相关的挤压磨损机理。Al含量高的合金试样表现出最佳的磨损特性。在室温下，单相BCC金属间合金中没有形成磨损痕迹，与其他样品相比，它们在高温下表现出更高的磨损强度。