Drilling of carbon epoxy composite using nanocrystalline nickel alloy coated tools

Balaraju, JN and Manikandanath, NT and Karuppannan, D and Sanjeev Kumar, S (2013) Drilling of carbon epoxy composite using nanocrystalline nickel alloy coated tools. In: INCCOM-12, 12 Dec 2013, HAL, Bangalore.

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Abstract

This paper is concerned with the effect of auto-catalytically deposited Nickel alloy coating on the machining performance of High Speed Steel (HSS) drill bits in the drilling of carbon composite. The present work is focussed on the performance comparison of nanocrystalline Nickel-Boron (Ni-B) coated and uncoated HSS twist drill bits of size 5 & 6 mm by evaluating tool wear, hole deviation error, extent of delamination, surface roughness of the hole when drilling carbon epoxy laminate. In addition to this the coating was also characterized by ICP-OES (Inductively Coupled Plasma), FESEM (Field Emission Scanning Electron Microscope), DSC (Differential Scanning Calorimetry) and NHT (Nanohardness Test) to study the composition, surface morphology, phase transformation behavior and nanohardness respectively. The coating showed typical nodular morphology in as-deposited condition. The activation energy required for the Ni-B coating to convert from meta-stable phase to stable crystalline phase was found out to be 160.4 kJ/mol. The coating showed the surface hardness of 1118HV30mN and 1445HV30mN in as-deposited and heat-treated conditions.

Item Type: Conference or Workshop Item (Paper)
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Mrs SK Pratibha
Date Deposited: 09 Jun 2015 07:47
Last Modified: 09 Jun 2015 07:47
URI: http://nal-ir.nal.res.in/id/eprint/12113

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