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Predicting Porosity and Microhardness of the High Velocity Oxy-Fuel (HVOF) Sprayed Iron Based Amorphous Metallic Coatings


Affiliations
1 Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, Tamil Nadu, India
2 Protective Technologies Department, Naval Materials Research Laboratory (NMRL), Ambernath, Thane (Dist), Maharashtra, India
     

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Fluid handling equipment such as propellers, impellers, pumps posses the inherent risk of flow-dependent erosion-corrosion problems. Though there are many coating materials available to combat erosion-corrosion damage in the above components, iron based amorphous coatings exhibits high erosion-corrosion resistance. High velocity oxy-fuel (HVOF) spray process is extensively used to deposit erosion-corrosion resistance amorphous coatings. In this investigation, iron based amorphous metallic coating was deposited on 316 stainless steel using HVOF spray process by varying the parameters such as oxygen flow rate, fuel flow rate, powder feed rate, carrier gas flow rate, and spray distance. Empirical relationships were established to predict the porosity and micro hardness of iron based amorphous coating. Microstructure observations of the coating were done by optical microscope. From the results, it is found that, fuel flow rate and spray distance appeared to be the most significant parameters affecting the mechanical properties of the iron based amorphous coating.

Keywords

High Velocity Oxy Fuel Spray, Iron Based Amorphous Metallic Coating, Micro-Hardness, Porosity.
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  • Wood, RJK; Speyer, AJ: Erosion–corrosion of candidate HVOF aluminium-based marine coatings, ‘Wear’ vol. 256, no. 5, 2003, 545-56.

  • Wang, Y; Xing, ZZ; Luo, Q; Rahman, A; Jiao, J; Qu, SJ; Zheng, YG; Shen, J: Corrosion and erosion–corrosion behaviour of activated combustion high-velocity air fuel sprayed Fe-based amorphous coatings in chloride-containing solutions, ‘Corrosion Science’ vol. 98, no. 10, 2015, 339–353.

  • Zhou, H; Zhang, C; Wang, W; Yasir, M; Liu, L: Microstructure and Mechanical Properties of Fe-based Amorphous Composite Coatings Reinforced by Stainless Steel Powders, ‘J. Mater. Sci. Technol’, vol. 31, no. 1, 2015, 43-47.

  • Sasaki, K; Burstein, GT: Erosion Corrosion of stainless steel under impingement by a fluid jet, ‘Corrosion Science’ vol. 49, no. 1, 2007, 92-102.

  • Wang, YG; Zheng, YG; Ke, W; Sun, WH; Hou, WL; Chag, XC; Wang, JQ: Slurry erosion– corrosion behaviour of high-velocity oxy-fuel (HVOF) sprayed Fe-based amorphous metallic coatings for marine pump in sand-containing NaCl solutions, ‘Corrosion Science’, vol. 53, no. 10, 2011, 3177-3185.

  • Burstein, GT; Sasaki, K: Effect of impact angle on the slurry erosion corrosion of 304L stainless steel, ‘Wear’, vol. 240, no. 1-2, 2000, 80-94.

  • Rajahram, SS; Harvey, TJ; Wood, RJK: Erosion Corrosion resistance of engineering materials in various test conditions, ‘Wear’, vol. 267, no. 1-2, 2009, 244-254.

  • Hu, X; Neville, A: The electrochemical response of stainless steels in liquid-solid impingement, ‘Wear’, vol. 258, no. 1-4, 2005, 641-648.

  • Murugan, K; Ragupathy, A; Balasubramanian, V; Sridhar, K; Optimizing HVOF Spray Parameters to attain minimum porosity and maximum hardness in WC-10Co-4Cr Coatings, ‘Surface and coating technology’, vol. 247, no. 1, 2014, 90-102.

  • Thiruvikraman, C; Balasubramanian, V; Sridhar, K: Optimizing HVOF Spray Parameters to Maximize Bonding Strength of WC-CrC-Ni Coatings on AISI 304L Stainless Steel, ‘ASM International’, vol. 23, no. 5, 2014, 860-875.

  • Doring, E; Vaben, R; Stover, D; Julich, D: The Influence of Spray Parameters on Particle Properties, ‘ITSC-International Thermal Spray Conf’ (DVS-ASM), Paper 3, 2002, 440-448

  • Miller, RG; Freund, JE; Johnson, DE; Probability and Statistics for Engineers, Prentice of Hall of India Pvt. Ltd., New Delhi, 1999.

  • Thirumalaikumarasamy, D; Shanmugam, K; Balasubramanian, V: Establishing empirical relationships to predict porosity level and corrosion rate of atmospheric plasma-sprayed alumina coatings on AZ31B magnesium alloy, ‘Journal of Magnesium and Alloys’, vol. 2, no. 2, 2014, 140-153.

  • Montgomery, DC: Design and analysis of experiments. 2nd ed., Wiley, New York, 1984.

  • Cochran, WG; Cox, GM: Experimental designs. 2nd ed., Singapore: John Wiley & Sons (Asia) Pvt Ltd., 1992.

  • Thirumalaikumarasamy, D; Shanmugam, K; Balasubramanian, V: Developing Empirical Relationships to Predict Porosity and Microhardness of Atmospheric Plasma-Sprayed Alumina Coatings on AZ31B Magnesium Alloy, ’J. Manuf. Sci. Prod’, vol. 15, no. 2, 2015, 169–181


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  • Predicting Porosity and Microhardness of the High Velocity Oxy-Fuel (HVOF) Sprayed Iron Based Amorphous Metallic Coatings

Abstract Views: 340  |  PDF Views: 4

Authors

S. Vignesh
Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, Tamil Nadu, India
K. Shanmugam
Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, Tamil Nadu, India
V. Balasubramanian
Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, Tamil Nadu, India
K. Sridhar
Protective Technologies Department, Naval Materials Research Laboratory (NMRL), Ambernath, Thane (Dist), Maharashtra, India

Abstract


Fluid handling equipment such as propellers, impellers, pumps posses the inherent risk of flow-dependent erosion-corrosion problems. Though there are many coating materials available to combat erosion-corrosion damage in the above components, iron based amorphous coatings exhibits high erosion-corrosion resistance. High velocity oxy-fuel (HVOF) spray process is extensively used to deposit erosion-corrosion resistance amorphous coatings. In this investigation, iron based amorphous metallic coating was deposited on 316 stainless steel using HVOF spray process by varying the parameters such as oxygen flow rate, fuel flow rate, powder feed rate, carrier gas flow rate, and spray distance. Empirical relationships were established to predict the porosity and micro hardness of iron based amorphous coating. Microstructure observations of the coating were done by optical microscope. From the results, it is found that, fuel flow rate and spray distance appeared to be the most significant parameters affecting the mechanical properties of the iron based amorphous coating.

Keywords


High Velocity Oxy Fuel Spray, Iron Based Amorphous Metallic Coating, Micro-Hardness, Porosity.

References