High-temperature tribological properties of Fe50Mn25Cr5Al15Ti5 iron-based high-entropy alloys

IF 6.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Tiewei Xu , Jianyi Li , Yuan Yu , Tongyang Li , Lujie Wang , Huaguo Tang , Zhuhui Qiao
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Abstract

The iron-based high-entropy alloys are poised to become the next generation of high-temperature materials due to their outstanding mechanical properties and cost-effectiveness. In this work, the microstructure, mechanical properties, and tribological behaviors of Fe50Mn25Cr5Al15Ti5 iron-based high-entropy alloys are investigated. The grain morphology of Fe50Mn25Cr5Al15Ti5 alloy is equiaxed and dominated by BCC structure. Fe50Mn25Cr5Al15Ti5 alloy has higher hardness, better resistance to high-temperature softening and superior wear resistance than Hadfield steel (40Mn18Cr3). Within 800 °C, wear rate remains a low order of 10−5 mm3/N·m. At RT, abrasive wear is the dominant mechanism. At 400 °C, non-dense oxide layer containing unoxidized metal is formed, resulting in delamination, adhesion and abrasion. At 800 °C, a dense wear-resistant oxide glaze layer covers the wear surface.
Fe50Mn25Cr5Al15Ti5铁基高熵合金的高温摩擦学性能
铁基高熵合金因其优异的机械性能和成本效益,有望成为下一代高温材料。本文研究了Fe50Mn25Cr5Al15Ti5铁基高熵合金的显微组织、力学性能和摩擦学行为。Fe50Mn25Cr5Al15Ti5合金的晶粒形貌为等轴组织,以BCC组织为主。Fe50Mn25Cr5Al15Ti5合金具有比哈德菲尔德钢(40Mn18Cr3)更高的硬度、更好的耐高温软化性能和优异的耐磨性。在800°C内,磨损率保持在10 ~ 5 mm3/N·m的低数量级。在RT,磨料磨损是主要的机制。在400℃时,形成含有未氧化金属的非致密氧化层,导致脱层、粘连和磨损。在800℃时,一层致密的耐磨氧化釉层覆盖在磨损表面。
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来源期刊
Tribology International
Tribology International 工程技术-工程:机械
CiteScore
10.10
自引率
16.10%
发文量
627
审稿时长
35 days
期刊介绍: Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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