Improving wear resistance of Ti6Al6V2Sn alloy by reinforcing AlBeSiTiV high-entropy alloy through microwave sintering

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-11-20 DOI:10.1016/j.triboint.2024.110415

S. Ragunath , N. Radhika , S.Aravind Krishna , Animesh Kumar Basak

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引用次数: 0

Abstract

The present study examines the wear performance of microwave-sintered Ti6Al6V2Sn (Ti662) alloy reinforced with 15 wt% AlBeSiTiV High-Entropy Alloy (HEA). The AlBeSiTiV HEA is synthesized by ball milling at 250 rpm for 20 h, resulting in irregular fragments with a mean size of 15 µm and an FCC phase structure. The α-Ti grains decreased with increment of β -Ti grains upon adding HEA reinforcement with the Ti662 alloy. The Ti662/HEA composite exhibited 762 HV microhardness mainly due to refined grains through uniform dissipation in the sintering. The grains sized 0.597 µm on average. The pin-on-disc tribometer is employed to evaluate the wear rate of Ti662/HEA composite under varied process parameters such as applied load, sliding velocity, and sliding distance resulted in enhanced wear resistance through grain refinement, hindering effect, and superior interfacial bonding properties of reinforced HEA particles. Morphological analysis of the worn surfaces reveals wear mechanisms, including delamination, grooves, and the formation of oxide layers. These layers are developed due to the reinforcement of HEA with Ti662 alloy, serving as a protective film over the composite surface against wear.

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通过微波烧结强化 AlBeSiTiV 高熵合金提高 Ti6Al6V2Sn 合金的耐磨性

本研究探讨了微波烧结 Ti6Al6V2Sn（Ti662）合金的磨损性能，该合金由 15 wt% 的 AlBeSiTiV 高熵合金（HEA）强化。AlBeSiTiV HEA 是通过球磨法合成的，球磨速度为 250 rpm，持续时间为 20 小时，球磨结果产生了平均尺寸为 15 µm 的不规则碎片和 FCC 相结构。在 Ti662 合金中加入 HEA 增强材料后，α-Ti 晶粒减少，β-Ti 晶粒增加。Ti662/HEA 复合材料的显微硬度为 762 HV，这主要是由于在烧结过程中通过均匀耗散细化了晶粒。晶粒平均尺寸为 0.597 µm。采用针盘摩擦磨损测试仪评估了 Ti662/HEA 复合材料在不同工艺参数（如外加载荷、滑动速度和滑动距离）下的磨损率，结果表明，通过晶粒细化、阻碍效应以及增强型 HEA 颗粒优异的界面结合性能，Ti662/HEA 复合材料的耐磨性得到了增强。对磨损表面的形态分析揭示了磨损机制，包括分层、沟槽和氧化层的形成。这些氧化层的形成是由于 HEA 与 Ti662 合金的增强，在复合材料表面形成了一层防止磨损的保护膜。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.