Influence of Graphene Sheet on Microstructure and Properties of Ni-based Alloy Coatings Prepared by Laser Cladding
Journal Title: Materials Science-Medžiagotyra - Year 2019, Vol 25, Issue 3
Abstract
Ni-based alloy cladding layers with different graphene sheet additions were prepared by laser cladding on the 40CrNi2Si2MoV steel substrate. The influence of the graphene sheet on the microstructure and properties of the cladding layers was investigated. The results show that owing to the diffusion-reaction dissolution, the graphene sheet addition does not bring a corresponding change in the phase constitutions of the cladding layers, i. e., the cladding layers are still composed of γ-Ni, Ni3B, and M7C3 phases. But what has changed is that the solidified structure is refined, and the volume fractions of the eutectic and the carbide are increased with the increase of graphene sheet addition. As a result, the hardness and the wear resistance of the cladding layers gradually increase, whereas the friction coefficient firstly decreases and then increases, with the lowest friction coefficient obtained at 0.5 vol.% graphene sheet addition. Compared to the Ni-based alloy cladding layers with micro-size graphite additions, the studied cladding layers exhibit improved hardness and wear resistance, good forming quality, and increased friction coefficient.
Authors and Affiliations
Geng TIANYUAN, Cunshan Wang
Keywords
Related Articles
- EP ID EP615503
- DOI 10.5755/j01.ms.25.3.19173
- Views 42
- Downloads 0
Process Optimization of Cold Metal Transfer Plug Welding of Aluminum AA6061-T6-to-Galvanized DP590 Steel Based on Orthogonal Experiment Method
In this paper, cold metal transfer (CMT) plug welding of aluminum AA6061-T6-to-galvanized DP590 steel is studied using AlSi-5 welding wire as filler material. The influence of wire feeding speed on welding quality is one...
Turbulence Imaging Simulation Based on Electrically Tunable Polymer Dispersed Liquid Crystals Cell
In this study, the scattering properties of polymer dispersed liquid crystals (PDLC) and its optical features for use in turbulence image simulation are presented. A PDLC cell composed of a liquid crystal/monomer mixture...
First Principles Study on Li-doped and Li,O-codoped AlN
This paper focuses on the detailed investigation of the structural and electronic properties of wurtzite AlN crystals doped by Li with and without oxygen with the first principles calculation. All the calculations have e...
The Regeneration Cycle of Cobalt Chemical Conversion Waste Liquid on Aluminum Alloys
In this research, the regeneration cycle of cobalt chemical conversion waste liquid, the effects of oxidizing agents on solution service life, and the influence of oxidizing agents on the treatment of waste liquid was st...
Effects of Crushed Oyster Shell on Strength and Durability of Marine Concrete Containing Fly Ash and Blastfurnace Slag
A large quantity of oyster shell is generated every year in coastal regions. Instead of being dumped as waste, after crushing or grinding, oyster shell may be recycled for use in concrete. Herein, the use of crushed oyst...