氧化物弥散强化富镍高熵合金磨损微观机理的探讨

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2025-09-20 DOI:10.1016/j.triboint.2025.111224

Manashi Sabat, Md Akif Faridi, Sudhansu Maharana, D.K.V.D. Prasad, Tapas Laha

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引用次数: 0

摘要

氧化物弥散体合并成高熵合金（HEAs）为设计具有优异力学和摩擦学性能的结构材料提供了一条途径。本研究报道了通过机械合金化和火花等离子烧结制备富镍HEA及其氧化物分散增强（ODS）变体，该变体由3 vol. % Y2O3纳米颗粒增强。重点是破译机械和磨损行为，特别是地下变形特征。ODS-HEA的磨损率和磨损体积损失显著降低。观察到原始hea的主要磨损机制由塑性变形和磨损向ODS-HEA的氧化和粘附磨损转变。在原始hea中，滑移活动占主导地位，而ODS-HEA表现出应变积累减少和塑性受限。研究结果表明，ODS-HEA的磨损不仅受硬度的影响，还受地下变形特征的影响。

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Insight into the micro-mechanisms of wear in oxide dispersion strengthened Ni-rich high entropy alloy

Amalgamation of oxide dispersoids into high entropy alloys (HEAs) offers a pathway for designing structural materials with superior mechanical and tribological properties. This study reports synthesis of Ni-rich HEA and its oxide dispersion strengthened (ODS) variant, reinforced with 3 vol. % Y₂O₃ nanoparticles, via mechanical alloying and spark plasma sintering. Emphasis was placed on deciphering mechanical and wear behaviour, specifically subsurface deformation characteristics. ODS-HEA exhibited significantly lower wear rate and wear volume loss. Transition in dominant wear mechanism from plastic deformation and abrasion in pristine-HEA to oxidative and adhesive in ODS-HEA was observed. Slip activity dominated in pristine-HEA, while ODS-HEA exhibited reduced strain accumulation and constrained plasticity. Findings suggest wear in ODS-HEA was influenced by subsurface deformation characteristics, beyond just hardness.

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来源期刊

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.