Investigation of the effect of the addition of grain refiner and modifier addition on wear properties in sand and permanent mould casting of A357 and A380 aluminium alloys

Çolak, Murat; Arslan, İbrahim

doi:10.1080/13640461.2022.2069912

Cited by 7 publications

(1 citation statement)

References 16 publications

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“…Chandrashekharaiah et al [18] investigated the dry sliding tribological performance of grain-refined and modified eutectic Al-12Si alloy, where adhesive wear was observed on the worn surface. Çolak et al [19] studied the effects of grain refiner and modifier additives on tribological properties of A357 aluminum alloys, demonstrating that Al5Ti1B grain refiner and Al10Sr modifier additives could decrease the friction coefficient and increase the wear resistance significantly. Lorenzetti et al [20] studied the wear performance of AlSi7Mg0.6 alloy produced by LPBF technique, where the refined microstructure decreased the wear rate compared with conventional processing techniques.…”

Section: Introductionmentioning

confidence: 99%

Influence of Applied Load and Sliding Distance on Wear Performance of AlSi7Mg0.6 Aluminum Alloy

Zhang,

Zhao,

Pan

et al. 2023

Metals

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The wear performance of AlSi7Mg0.6 aluminum alloy, a casting aluminum alloy used in positioning devices for catenary systems of high-speed railways which fail frequently on lines where the speed of trains is higher than 300 m/s, is discussed in this study. It was estimated that sliding contact wear occurred and mainly contributed to the failure. To explore the competing mechanism for frictional wear failure, frictional experiments based on three groups of sliding distance (0.5 mm, 1.5 mm and 3.0 mm) and four groups of applied loads (20 N, 50 N, 100 N and 200 N) were implemented. Three-dimensional morphological observation results revealed that the wear volumes at a sliding distance of 0.5 mm were only about 1/10 of that at a sliding distance of 3.0 mm. It was also revealed that the wear volume based on a sliding distance of 3.0 mm and applied load of 20 N was still much larger than the wear volume under a sliding distance of 0.5 mm and applied load of 200 N. SEM observation of the microstructures revealed that abrasive wear was the dominant wear mechanism in dry sliding friction conditions. A simplified positioning device model was also established to study the influence of tension force on wear performance. The simulation results revealed that smaller tension force between the positioning support and positioning hook would lead to higher relative sliding distance and larger wear depth. Sliding contact friction should be avoided due to relatively large wear efficiency compared with rolling contact friction. Both experimental and simulation results suggested that proper tension force was preferred in assembling components which could ensure rolling contact friction rather than sliding contact friction.

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Section: Introductionmentioning

confidence: 99%