Microstructure and Wear Behavior of the High‐Velocity‐Oxygen‐Fuel Sprayed and Spark Plasma Sintered High‐Entropy Alloy AlCrFeCoNi,Advanced Engineering Materials

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Microstructure and Wear Behavior of the High‐Velocity‐Oxygen‐Fuel Sprayed and Spark Plasma Sintered High‐Entropy Alloy AlCrFeCoNi
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-12-23 , DOI: 10.1002/adem.202001253
Martin Löbel ₁ , Thomas Lindner ₁ , Steffen Clauß ₁ , Robert Pippig ₁ , Dagmar Dietrich ₁ , Thomas Lampke ₁

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High‐entropy alloy AlCrFeCoNi powder with a metastable body centered cubic (bcc) structure is produced by inert gas atomization. This state is largely preserved after processing the powder by high‐velocity‐oxygen‐fuel (HVOF) thermal spraying. A heat treatment is conducted with the objective to form a duplex structure comprising a ductile face centered cubic (fcc) phase. The formation of an additional fcc phase is accompanied by a decrease in hardness and a significant improvement of wear resistance. The alternative processing route, spark plasma sintering (SPS), causes a duplex bcc and fcc structure. Detailed analyses of phase formation and wear behavior for all production routes contribute to a better understanding of microstructural effects in high‐entropy alloys.

中文翻译：

高速氧燃料喷射和等离子烧结高熵合金AlCrFeCoNi的显微组织和磨损行为

通过惰性气体雾化生产具有亚稳体心立方（bcc）结构的高熵合金AlCrFeCoNi粉。在通过高速氧气燃料（HVOF）热喷涂处理粉末后，这种状态在很大程度上得以保留。目的是进行热处理以形成包括延性面心立方（fcc）相的双相结构。额外的fcc相的形成伴随着硬度的降低和耐磨性的显着提高。替代工艺路线，火花等离子体烧结（SPS），会导致双重bcc和fcc结构。对所有生产路线的相形成和磨损行为进行详细分析有助于更好地理解高熵合金的微观结构效应。

更新日期：2020-12-23

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