|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Surface Interactions in Materials
||Effect of Trace Addition of Graphene in Tribological Properties of Ultrasonic Vibration-assisted Laser Surface Textured Stainless Steel
||Sourabh Biswas, Linqi Zhang, Seyyed Habib Alavi, Ali Kaan Kalkan, Sandip P. Harimkar
|On-Site Speaker (Planned)
Graphene has attracted significant interest in the past few decades due to its unique properties. In particular, graphene reduces friction and wear loss in structural materials. The present investigation reports the effect of graphene addition in the tribological properties of sliding steel surfaces, with the substrates processed with a novel processing technique involving laser texturing with simultaneous application of ultrasonic vibrations. The increase in vibration amplitude increased the surface roughness that was observed to further decrease coefficient of friction. It was established that just trace addition of graphene monolayer flakes (average thickness of 0.35 nm) resulted in significant decrease in the coefficient of friction. The Raman spectroscopy analysis of the wear scars revealed the presence of graphene validating even trace addition of graphene results in formation of a highly lubricated tribolayer. Raman spectra also indicate defect formation in the graphene during wear due to the severe shear stresses.
||Planned: Supplemental Proceedings volume