Impact of surface texturing on the tribological behaviour of aluminium-silicon (Al-Si/Al2O3) advanced composite under dry and lubricating conditions. (1st September 2022)

• Record Type: Journal Article
• Authors: Srivyas, Pranav Dev; Charoo, M S; Wani, M F; Sehgal, Rakesh; Raina, Ankush; Haq, Mir Irfan Ul; Shekhar, Chandra; Medhi, Tanmoy; Arumugam, Soundhar
• Is Part Of: Surface topography. Volume 10:Number 3(2022)
• Publication Date: 2022-09-01
• Subjects: laser texturing (LT) -- friction -- wear -- lubrication -- aluminium-silicon -- aluminium oxide; Surfaces (Physics) -- Periodicals; Surfaces (Physics) -- Measurement -- Periodicals; 530.417
• DOI: 10.1088/2051-672X/ac929a
• Languages: English
• ISSNs: 2051-672X

Abstract

Abstract: In the present work, modification of aluminum-silicon (Al-Si) alloy based advanced composite surface is performed using laser texturing (LT ). Surface texturing (ST ) with different patterns, i.e., dimple (T1 ), square (T2 ), triangular (T3 ), and line hatched (T4 ) textures are done on the alloy surface and its impact on the mechanism to reduce friction and wear are investigated. The tribo tests are conducted at 10 N load, Hertzian contact pressure (Pmax ) 708.7 MPa, 1 mm stroke length, frequency 50 Hz and sliding distance (SD ) up to 450 m. The tribological behavior of the non-textured surface (NTS ) and textured surface (TS ) are examined under dry sliding conditions (DSC ) and two lubricating sliding conditions (LSC ) comprising of virgin PAO-4 (Lube-1) and PAO-4 + 1 wt% graphene nanoplatelets (Lube-2). T2 texture reveals a 49.53%, 69.21% and 44.91% decrease in friction coefficient(COF) and 58.1%, 43.74% and 83.86% decrease in wear volume (WV ) than the NTS for DSC, Lube-1 and, Lube-2, correspondingly. Results show that ST improved friction efficiency, and shortened the running-in period. The current study results help to provide in-depth interpretation of micro-texturing and its relationship w.r.t. tribological characteristics.