PSI - Issue 38

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 ScienceDirect

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Procedia Structural Integrity 38 (2022) 40–49

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers Abstract In this paper, the Low Cycle Fatigue (LCF) performance of a weight optimized SLM Ti-6Al-4V bracket has been investigated. The bracket, a ‘strut s & connectors ’ shape for an aero -engine application, was designed to operate within the material elastic li it. The tensile and LCF fatigue data obtained from the coupon tests are discussed first which was then used to establish the loading levels for the LCF tests on the bracket. Cyclic softening was observed in the LCF coupon tests at strain levels higher than the material elastic li it, which was attributed to the pile-up of dislocations and formation of sub-grains in the SLM Ti-6Al-4V material. The SLM Ti-6Al-4V bracket met the LCF target cycles when operated near the material elastic limit and also when cycled at displacement levels causing plastic strain in the bracket elements. The carefully designed, weight optimized bracket has shown promising results in terms of its LCF performance and this provides a good encouragement to practicing engineers to adopt SLM technology for load bearing applications. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Fatigue property-performance relationship of additively manufactured Ti-6Al-4V bracket for aero-engine application: An experimental study Alok Gupta a,b , Chris J. Bennett b , Wei Sun b a Rolls Royce plc, Derby, DE24 8BJ, United Kingdom b Gas Turbine and Transmissions Research Centre (G2TRC), Faculty of Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom Abstract In this paper, the Low Cycle Fatigue (LCF) performance of a weight optimized SLM Ti-6Al-4V bracket has been investigated. The bracket, a ‘strut s & connectors ’ shape for an aero -engine application, was designed to operate within the material elastic limit. The tensile and LCF fatigue data obtained from the coupon tests are discussed first which was then used to establish the loading levels for the LCF tests on the bracket. Cyclic softening was observed in the LCF coupon tests at strain levels higher than the material elastic limit, which was attributed to the pile-up of dislocations and formation of sub-grains in the SLM Ti-6Al-4V material. The SLM Ti-6Al-4V bracket met the LCF target cycles when operated near the material elastic limit and also when cycled at displacement levels causing plastic strain in the bracket elements. The carefully designed, weight optimized bracket has shown promising results in terms of its LCF performance and this provides a good encouragement to practicing engineers to adopt SLM technology for load bearing applications. FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design F tig property performance relati nship of add tively manufactured Ti-6Al-4V brack t for aero-engine application: An experimental study Alok Gupta a,b , Chris J. Bennett b , Wei Sun b a Rolls Royce plc, Derby, DE24 8BJ, United Kingdom b Gas Turbine and Transmissions Research Centre (G2TRC), Faculty of Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom

Keywords: Selective Laser Melting; Bracket; Low Cycle Fatigue; Cyclic Softening; Fracture.

* Corresponding author. +44-7775404077 E-mail address: alok.gupta@nottingham.ac.uk * Corresponding author. +44-7775404077 E-mail address: alok.gupta@nottingham.ac.uk

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers 10.1016/j.prostr.2022.03.005

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