Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications

JOHAL, ARANDEEP

doi:10.23889/SUthesis.58887

E-Thesis 1083 views

Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications / ARANDEEP JOHAL

Swansea University Author: ARANDEEP JOHAL

E-Thesis – open access under embargo until: 15th June 2026

DOI (Published version): 10.23889/SUthesis.58887

Abstract

The purpose of this PhD project was the continual development of the powder interlayer bonding technique for high temperature alloys, more specifically Ti-6Al-2Sn-4Zr-6Mo. The application of this technology is for the potential use as a joining and repair technology on BLISKs. The requirement of ext...

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Published:	Swansea 2026
Institution:	Swansea University
Degree level:	Doctoral
Degree name:	Ph.D
Supervisor:	Davies, Helen M.
URI:	https://cronfa.swan.ac.uk/Record/cronfa58887
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first_indexed	2021-12-03T16:05:01Z
last_indexed	2021-12-08T04:19:10Z
id	cronfa58887
recordtype	RisThesis
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spelling	2021-12-07T17:23:26.9513959 v2 58887 2021-12-03 Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications 12f5b0cc9bfc8703b8b26ca284086496 ARANDEEP JOHAL ARANDEEP JOHAL true false 2021-12-03 The purpose of this PhD project was the continual development of the powder interlayer bonding technique for high temperature alloys, more specifically Ti-6Al-2Sn-4Zr-6Mo. The application of this technology is for the potential use as a joining and repair technology on BLISKs. The requirement of extended life cycles for aerospace components such as this is important for the viability of technologies which aim to further improve efficiency within the gas turbine engine. The principle of interlayer bonding is on the utilisation of powder based interlayer which is used to improve bond integrity between two surfaces.Research during this thesis programme has resulted in the development of an interlayer bonding technique that allows for the evaluation of using an inert gas environment, instead of traditional vacuum systems, with a focus on how this technology would eventually be implemented on more complex geometries. The use of argon shielding gas provided the required environment to limit the oxidation of titanium at elevated temperature required for bonding. The results allowed for the mechanical performance of the interlayer bonds to be evaluated, along with the effects of using a post bond heat anneal, with the properties of interlayer bonded Ti-6246 showing only a slight reduction in room temperature properties in comparison to the base material.Preliminary research was also conducted on evaluating the possibility of joining dissimilar titanium alloys, with a focus on Ti-6246 and Ti-6242. With the right balance of the key bonding parameters it was possible to create low porosity bonds between the alloy systems with the tensile results again showing a small debit in strength.The final stages of the programme focused on the potential use of alternate interlayers, including different morphology of alloyed titanium powder as well as Commercially Pure powder and foil with potentially further avenues of research available to investigate. E-Thesis Swansea Aerospace Applications 15 6 2026 2026-06-15 10.23889/SUthesis.58887 COLLEGE NANME COLLEGE CODE Swansea University Davies, Helen M. Doctoral Ph.D Rolls Royce and EPSRC. 2021-12-07T17:23:26.9513959 2021-12-03T16:00:00.3868298 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised ARANDEEP JOHAL 1 Under embargo Under embargo 2021-12-03T16:23:49.0891221 Output 14044091 application/pdf E-Thesis – open access true 2026-06-15T00:00:00.0000000 Copyright: The Author 2021. true eng
title	Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications
spellingShingle	Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications ARANDEEP JOHAL
title_short	Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications
title_full	Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications
title_fullStr	Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications
title_full_unstemmed	Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications
title_sort	Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications
author_id_str_mv	12f5b0cc9bfc8703b8b26ca284086496
author_id_fullname_str_mv	12f5b0cc9bfc8703b8b26ca284086496_***_ARANDEEP JOHAL
author	ARANDEEP JOHAL
author2	ARANDEEP JOHAL
format	E-Thesis
publishDate	2026
institution	Swansea University
doi_str_mv	10.23889/SUthesis.58887
college_str	Faculty of Science and Engineering
hierarchytype
hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str	0
active_str	0
description	The purpose of this PhD project was the continual development of the powder interlayer bonding technique for high temperature alloys, more specifically Ti-6Al-2Sn-4Zr-6Mo. The application of this technology is for the potential use as a joining and repair technology on BLISKs. The requirement of extended life cycles for aerospace components such as this is important for the viability of technologies which aim to further improve efficiency within the gas turbine engine. The principle of interlayer bonding is on the utilisation of powder based interlayer which is used to improve bond integrity between two surfaces.Research during this thesis programme has resulted in the development of an interlayer bonding technique that allows for the evaluation of using an inert gas environment, instead of traditional vacuum systems, with a focus on how this technology would eventually be implemented on more complex geometries. The use of argon shielding gas provided the required environment to limit the oxidation of titanium at elevated temperature required for bonding. The results allowed for the mechanical performance of the interlayer bonds to be evaluated, along with the effects of using a post bond heat anneal, with the properties of interlayer bonded Ti-6246 showing only a slight reduction in room temperature properties in comparison to the base material.Preliminary research was also conducted on evaluating the possibility of joining dissimilar titanium alloys, with a focus on Ti-6246 and Ti-6242. With the right balance of the key bonding parameters it was possible to create low porosity bonds between the alloy systems with the tensile results again showing a small debit in strength.The final stages of the programme focused on the potential use of alternate interlayers, including different morphology of alloyed titanium powder as well as Commercially Pure powder and foil with potentially further avenues of research available to investigate.
published_date	2026-06-15T04:15:46Z
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score	11.012678

Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications / ARANDEEP JOHAL

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