Indian Journal of Engineering & Materials Sciences

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Optimization of process parameters of laser composite surfaced Ti-13Nb-13Zr using Taguchi method


Affiliations
1 Department of Metallurgical & Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
2 Northumbria University, Ellison Pl, Newcastle upon Tyne NE1 8ST, United Kingdom

In the current study, laser composite surfacing (LCS) of Ti-13Nb-13Zr alloy has been undertaken by preplacing graphite coating (thickness of 250 μm) and subsequent laser melting with a 6 kW fibre optics delivered diode laser (mode: continuous wave) at varied power and scan speed. Based on the performance of the surface measured by microhardness, wear, and corrosion resistance; process parameters are optimized utilizing the Taguchi method. Analysis is conducted by the grey relational grade (GRG) and signal-to-noise (S/N) ratios of the output parameters. The derived optimal parameters are 1000 W applied power and 20 mm/s scan speed. Maximum improvement in microhardness (by 2 times), nanohardness (by 2.6 times), wear resistance (by 5.8 times) and corrosion resistance properties (by 6 times) are achieved after the LCS process. The investigation helps to establish an efficient process for Ti-13Nb-13Zr alloy fabricated by LCS.

Keywords

Ti-13Nb-13Zr, Laser Composite Surfacing, Optimization, Taguchi Method, S/N ratio
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  • Optimization of process parameters of laser composite surfaced Ti-13Nb-13Zr using Taguchi method

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Authors

Tapas Bera
Department of Metallurgical & Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
Indranil Manna
Department of Metallurgical & Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
Esther Titilayo Akinlabi
Northumbria University, Ellison Pl, Newcastle upon Tyne NE1 8ST, United Kingdom
Jyotsna Dutta Majumdar
Department of Metallurgical & Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India

Abstract


In the current study, laser composite surfacing (LCS) of Ti-13Nb-13Zr alloy has been undertaken by preplacing graphite coating (thickness of 250 μm) and subsequent laser melting with a 6 kW fibre optics delivered diode laser (mode: continuous wave) at varied power and scan speed. Based on the performance of the surface measured by microhardness, wear, and corrosion resistance; process parameters are optimized utilizing the Taguchi method. Analysis is conducted by the grey relational grade (GRG) and signal-to-noise (S/N) ratios of the output parameters. The derived optimal parameters are 1000 W applied power and 20 mm/s scan speed. Maximum improvement in microhardness (by 2 times), nanohardness (by 2.6 times), wear resistance (by 5.8 times) and corrosion resistance properties (by 6 times) are achieved after the LCS process. The investigation helps to establish an efficient process for Ti-13Nb-13Zr alloy fabricated by LCS.

Keywords


Ti-13Nb-13Zr, Laser Composite Surfacing, Optimization, Taguchi Method, S/N ratio