Stack drilling of CFRPT/TI using coated and uncoated tools.

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dc.contributor.advisorEndrino Armenteros, Jose
dc.contributor.advisorGoel, Saurav
dc.contributor.authorMughal, Bilal
dc.date.accessioned2023-04-13T11:50:27Z
dc.date.available2023-04-13T11:50:27Z
dc.date.issued2018-08
dc.description.abstractThe aerospace industry is increasingly utilising composite-metal stacks due to their superior mechanical properties and variable physical functions. Energy saving and increased strength/weight ratio are the two main factors why manufacturers are replacing separate composites and metal alloys with the hybrid stacks. These stacks are drilled and joined together with mechanical fasteners such as rivets. Single-shot drilling is a relatively new method and allows for time and cost reduction. But, because of the disparate nature of materials, drilling them at the same time poses great manufacturing challenges. Tool wear, increased temperature and poor machining quality are some of the issues encountered. This study investigated the performance of tools coated with diamond-like carbon (DLC) and boron-aluminium-magnesium (BAM) coatings which were deposited using physical vapour deposition (PVD) method. Drilling experiments were carried out on CFRP/Ti stacks and tool wear and hole quality were assessed. Tool wear results showed that DLC 1 tool had the best performance, showing the least wear. For BAM coatings, higher thickness caused the tools to fail earlier than DLC and BAM 1 tools. Uncoated tool failed after 25 holes. Overall coated tools DLC 1 and BAM 1 showed best performance.en_UK
dc.description.coursenamePhD in Manufacturingen_UK
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19452
dc.language.isoenen_UK
dc.rights© Cranfield University, 2015. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder.
dc.subjectDrillingen_UK
dc.subjectphysical vapour depositionen_UK
dc.subjectdiamond like carbonen_UK
dc.subjectboron-aluminium-magnesiumen_UK
dc.subjectcomposite-metal stacksen_UK
dc.subjecttool wearen_UK
dc.titleStack drilling of CFRPT/TI using coated and uncoated tools.en_UK
dc.typeThesisen_UK

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