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Powder interlayer bonding of geometrically complex Ti-6Al-4V parts / Ieuan Watkins, Helen Davies, Olivia Stanners Stanners, S. Marchisio

The International Journal of Advanced Manufacturing Technology, Volume: 106, Issue: 9-10, Pages: 3629 - 3639

Swansea University Authors: Ieuan Watkins, Helen Davies, Olivia Stanners Stanners

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Abstract

Powder interlayer bonding (PIB) is a novel joining technique, which has been developed to facilitate high integrity repairs of aerospace components, manufactured from commonly used Titanium alloys. The technique utilises an interlayer between complex geometric components which are mated under pressu...

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Published in: The International Journal of Advanced Manufacturing Technology
ISSN: 0268-3768 1433-3015
Published: Springer Science and Business Media LLC 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa52700
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Abstract: Powder interlayer bonding (PIB) is a novel joining technique, which has been developed to facilitate high integrity repairs of aerospace components, manufactured from commonly used Titanium alloys. The technique utilises an interlayer between complex geometric components which are mated under pressure and a highly localised heating source. In this study, induction heating enabled bonding in an inert fusion zone by use of an oxygen displacing shielding gas, with particular attention to the initial heating and pressure application. These early stages proved crucial to the elimination of pores and consolidation of the alloy powder, with porosity volume fraction reduced to just 0.5% after just 20 seconds at the bonding force. The technique has produced high integrity bonds in alloys such as Ti-6Al-4V, retaining approximately 90% of the alloy strength in previous studies, offering advantages over established joining methods such as tungsten inert gas (TIG) and plasma arc (PA) welding due to a more highly localised heating and fusion zone. It is believed that powder interlayer bonding can compete against these techniques, providing a more time and cost effective repair route for net shape components manufactured from a range of alloys with minimal post processing.
Keywords: Powder interlayer bonding (PIB); Ti-6-4; Complex geometry; Titanium powder; Repair
Issue: 9-10
Start Page: 3629
End Page: 3639