Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of Ti addition on the sliding wear behavior of AlCrFeCoNi high-entropy alloy
Wear ( IF 5 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.wear.2020.203493 Mingyu Wu , Ke Chen , Zhen Xu , D.Y. Li
Wear ( IF 5 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.wear.2020.203493 Mingyu Wu , Ke Chen , Zhen Xu , D.Y. Li
Abstract Originally defined high-entropy alloys (HEAs) are generally in a solid-solution state, which are solution-strengthened by multiple-elements with desired toughness. However, the mixture of multiple elements likely result in certain microstructure features, which could also benefit the HEAs. In this study, AlCrFeCoNi and AlCrFeCoNiTi0.5 high entropy alloys (HEAs) were fabricated, and their microstructures and sliding wear behaviors (in comparison with stainless steel) were investigated using XRD, SEM, EDS and a pin-on-disc tribometer, respectively. It is shown that the two HEAs consist of ordered Al–Ni/Al–Ni–Ti rich BCC and disordered Fe–Cr rich BCC domains. The AlCrFeCoNi alloy has an intertwined structure with plate-like Fe–Cr rich domains embedded in the Al–Ni rich matrix. The AlCrFeCoNiTi0.5 alloy shows a similar microstructure but has honeycomb-like Fe–Cr rich interdendrites. The Ti addition markedly increases the hardness of the alloy, leading to considerably enhanced resistance to sliding wear. Through wear tests with and without air-flow to minimize frictional heating along with worn surface analysis, we demonstrate that the Ti addition also enhances the oxide scale, making additional contribution to the wear resistance.
中文翻译:
Ti对AlCrFeCoNi高熵合金滑动磨损行为的影响
摘要 最初定义的高熵合金 (HEAs) 通常处于固溶状态,通过具有所需韧性的多种元素进行固溶强化。然而,多种元素的混合可能会导致某些微观结构特征,这也有利于 HEA。在本研究中,制备了 AlCrFeCoNi 和 AlCrFeCoNiTi0.5 高熵合金 (HEA),并分别使用 XRD、SEM、EDS 和销盘摩擦计研究了它们的微观结构和滑动磨损行为(与不锈钢相比) . 结果表明,两个 HEA 由有序的富含 Al-Ni/Al-Ni-Ti 的 BCC 和无序的富含 Fe-Cr 的 BCC 域组成。AlCrFeCoNi 合金具有交织结构,板状富 Fe-Cr 畴嵌入富 Al-Ni 基体中。AlCrFeCoNiTi0. 5 合金显示出类似的微观结构,但具有蜂窝状富含 Fe-Cr 的枝晶。添加 Ti 显着增加了合金的硬度,从而显着提高了抗滑动磨损性。通过使用和不使用气流的磨损测试,以最大限度地减少摩擦热以及磨损表面分析,我们证明添加 Ti 还增强了氧化皮,对耐磨性做出了额外的贡献。
更新日期:2020-12-01
中文翻译:
Ti对AlCrFeCoNi高熵合金滑动磨损行为的影响
摘要 最初定义的高熵合金 (HEAs) 通常处于固溶状态,通过具有所需韧性的多种元素进行固溶强化。然而,多种元素的混合可能会导致某些微观结构特征,这也有利于 HEA。在本研究中,制备了 AlCrFeCoNi 和 AlCrFeCoNiTi0.5 高熵合金 (HEA),并分别使用 XRD、SEM、EDS 和销盘摩擦计研究了它们的微观结构和滑动磨损行为(与不锈钢相比) . 结果表明,两个 HEA 由有序的富含 Al-Ni/Al-Ni-Ti 的 BCC 和无序的富含 Fe-Cr 的 BCC 域组成。AlCrFeCoNi 合金具有交织结构,板状富 Fe-Cr 畴嵌入富 Al-Ni 基体中。AlCrFeCoNiTi0. 5 合金显示出类似的微观结构,但具有蜂窝状富含 Fe-Cr 的枝晶。添加 Ti 显着增加了合金的硬度,从而显着提高了抗滑动磨损性。通过使用和不使用气流的磨损测试,以最大限度地减少摩擦热以及磨损表面分析,我们证明添加 Ti 还增强了氧化皮,对耐磨性做出了额外的贡献。