Mechanical property evaluation and wear optimization of LM13 MMC reinforced with AlTiVZrCrMo high entropy alloy

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

iScience Pub Date : 2025-04-04 DOI:10.1016/j.isci.2025.112356

Selvaraj Rameshkumar , Nachimuthu Radhika , Sundaram Ragunath , Animesh Kumar Basak

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Abstract

The increasing demand for lightweight materials with superior mechanical and tribological properties has driven the development of high-entropy alloys (HEAs) reinforced aluminum metal matrix composites (AMMCs). A 10 wt. % of ball-milled equiatomic AlTiVZrCrMo HEA is reinforced into LM 13 alloy using stir casting to enhance its mechanical properties and wear performance. The homogeneous HEA dispersion and grain refinement of the Al/HEA composite improves the microhardness, compressive strength, and tensile strength by 37.6%, 73.3%, and 47.8%, respectively, over the LM 13 alloy. The Pin-on-disc tribometer is used to evaluate the wear rate of the Al/HEA composite. The process parameters such as applied load, sliding distance, and sliding velocity are optimized using response surface methodology. Analysis of variance reveals that applied load is the influential parameter, followed by sliding distance and sliding velocity. Worn surface morphology reveals predominant wear mechanisms, including grooves, delamination, and oxide layer formation, offering insight into the composite’s wear behavior.

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AlTiVZrCrMo高熵合金增强LM13 MMC的力学性能评价及磨损优化

对具有优异力学和摩擦学性能的轻质材料的需求日益增长，推动了高熵合金增强铝金属基复合材料（ammc）的发展。采用搅拌铸造法将10 wt. %的等原子AlTiVZrCrMo HEA强化到lm13合金中，以提高其机械性能和磨损性能。Al/HEA复合材料HEA弥散均匀，晶粒细化，显微硬度、抗压强度和抗拉强度分别比lm13合金提高了37.6%、73.3%和47.8%。采用针盘式摩擦计对Al/HEA复合材料的磨损率进行了评价。利用响应面法对加载载荷、滑动距离和滑动速度等工艺参数进行了优化。方差分析表明，载荷是影响滑动速度的主要参数，其次是滑动距离和滑动速度。磨损表面形貌揭示了主要的磨损机制，包括沟槽、分层和氧化层的形成，从而深入了解复合材料的磨损行为。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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