Effect of graphene coating on the microstructure and mechanical properties of tungsten inert gas surface melted AISI-316L steel Online publication date: Mon, 24-May-2021
by Tanmoy Das; Abhishek Sharma; Jinu Paul
International Journal of Materials and Product Technology (IJMPT), Vol. 62, No. 1/2/3, 2021
Abstract: In this study, stainless steel substrates were coated with a graphene layer by a drop coating method. The surface of these graphene-coated samples was then modified using tungsten inert gas (TIG) surface melting technique. Phase changes, microstructure, microhardness, and wear properties of as-received (unprocessed), TIG surface-melted and graphene-coated TIG surface-melted specimens were inspected. Due to the inclusion of graphene, surface melting steered the creation of thick layers of iron-carbide (FeC) particles. The hardness of the graphene-coated melted layer depicted a high value of 420 HV, while the maximum hardness of the as-received surface melted layer was only 260 HV. Peak shifts observed in Raman spectroscopy depicts the disorderness developed in the graphene incorporated on the substrate. There is a reduction of ~14% in the specific wear rate with the incorporation of graphene coating due to its self-lubricating nature. As an outcome, as-received surface melted steel samples displayed relatively higher wear rates compared to those of surface melted graphene-coated specimens. The formation of a thin graphene tribolayer led to the reduction of the wear in the graphene-coated samples. Delamination, grooves, abrasive wear were observed on the as-received surface melted specimens where a very rough surface was obtained against the graphene-coated one.
Online publication date: Mon, 24-May-2021
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Materials and Product Technology (IJMPT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email firstname.lastname@example.org