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3999 |
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Thursday, May 22, 2014, Hall A 10:40 AM HVOF- / HVAF-Spraying |
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Design of experiment for advanced nanostructured WC-12Co coating HVOF: Three-point bending tests
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Joseph Stokes* / School of Mechanical & Manufacturing Engineering, National Centre for Plasma Science and Technology, Dublin City University, Ireland Ahmed Al Hamed / National Centre for Plasma Science and Technology, School of Mechanical and Manufacturing Engineering, Dublin City University,, Ireland Kahled Y. Benyounis/ School of Mechanical and Manufacturing Engineering, Dublin City University,, Ireland Hussain Al Fadhli/ Non-Metallic and Protective Coating Unit, Consulting Services Department, , Saudi Arabia Bekir S Yilbas/ Mechanical Engineering Department, King Fahd University of Petroleum and Minerals,, Saudi Arabia Saleem MSJ Hashmi/ School of Mechanical and Manufacturing Engineering, Dublin City University,, Ireland |
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One of the economical and fast solutions for failure against wear and corrosion in oil and gas industries is deposition of cermet using HVOF thermal spray coating. Recently, especially with the new development of bimodal (mixed of nano and micro size particle) feedstock powders, the compositions percentages of the mixed powders play a key factor in the final coating performance. In the present study, a design of experiment (DOE) software was implemented to study the influence of different powder percentage on the coating performance considered. The coating mechanical properties and the microstructure are investigated through three-point bending tests, hardness mesurement and SEM respectively. Results show that both the hardness bending yield strength of the coating increases as the composition percentage of nanostructured WC-12Co increase due to the strong adhesion of WC nano size grains at the substrate/coating interface through improved mechanical interlocking and reduce the possibility of cracks initiation. |