Fretting wear behavior on LPBF processed AlSi10Mg alloy for different heat treatment conditions

Nanjundaiah, RS and Rao, SS and Praveenkumar, K and Prabhu, TR and Shettigar, AK and Patel G C, M and Linul, E (2024) Fretting wear behavior on LPBF processed AlSi10Mg alloy for different heat treatment conditions. In: Journal of Materials Research and Technology, 30 . pp. 4330-4346.

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Abstract

To widen the industrial application of additively manufactured (AM) parts, the study of fretting wear behavior is essential, as it ensures the safety and reliability that drive innovation in design and materials. This study explores the fretting wear behavior of the as-built and heat-treated state of AlSi10Mg alloy fabricated, viz., laser powder bed fusion (LPBF). Initially, the as-built and T5, T6, and stress-relieved (SR) heat-treated samples were examined using scanning electron microscopy (SEM) to gain insights into the microstructural changes. The as-built samples exhibited a higher hardness level (135 HV) primarily due to the presence of very fine microstructure of the α-Al cellular matrix with embedded Si. The α-Al cellular structure dissolved with various heat treatments, and Si particles coarsened. The hardness decreased to 85, 79, and 67 HV for the T5, T6, and SR conditions, respectively. Subsequently, fretting tests were conducted on the samples, applying various normal loads of 10, 50, and 100 N. Further, the samples were characterized by the coefficient of friction (COF), worn surface morphology, and wear volume loss. The investigation showed that the as-built material showed less wear volume loss under all loading conditions than the heat-treated conditions. Furthermore, the T5 heat treated sample had a lower wear volume when compared to the T6 and SR heat-treated samples. The heat-treated sample exhibits compressive stress, whereas the LPBF processed, the as-built sample shows tensile stress. © 2024 The Authors

Item Type:	Journal Article
Publication:	Journal of Materials Research and Technology
Publisher:	Elsevier Editora Ltda
Additional Information:	The copyright for this article belongs to author.
Keywords:	Accident prevention; Aluminum alloys; Compressive stress; Friction; Hardness; Heat treatment; Morphology; Silicon; Surface morphology; Wear of materials; X ray diffraction, Fretting wear; Fretting wear behavior; Gain insight; Heat treatment conditions; Laser powder bed fusion; Laser powders; Microstructural changes; Powder bed; Wear volume loss; XRD, Scanning electron microscopy
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	24 May 2024 10:59
Last Modified:	24 May 2024 10:59
URI:	https://eprints.iisc.ac.in/id/eprint/84763

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