Effect of heat treatment on fatigue crack growth in multiple material layered IN718/316L structure fabricated by laser powder bed fusion
Effect of heat treatment on fatigue crack growth in multiple material layered IN718/316L structure fabricated by laser powder bed fusion
Multi-material specimens of 316L stainless steel and IN718 were produced in a layered architecture by the Laser Powder Bed Fusion (L-PBF) process. Specimens were heat treated at temperatures tailored for the combination of 316L and IN718. The effect of the heat treatment on the microstructure and on the tensile properties across the layers was investigated. Two heat-treated bi-layer specimens (No.1 and No.2) and one heat-treated 4-layer specimen (No.3) were tested under 3 point bending fatigue to compare the crack propagation resistance through multiple sets of dissimilar material interfaces. It was found that the crack propagation resistance overall is mainly controlled by the local microstructural strength, while the interface transition is most significant at lower values of stress intensity factor range (ΔK < 20 MPa√m).
Duval-Chaneac, Marie-Salome, Dani
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Gao, Nong
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Khan, R.H.U
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Giles, Michael
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Georgilas, K.
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Zhao, Xiao
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Reed, Philippa
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22 March 2022
Duval-Chaneac, Marie-Salome, Dani
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Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Khan, R.H.U
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Giles, Michael
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Georgilas, K.
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Zhao, Xiao
70e12f26-5ece-46cd-a186-3cac70e99a6f
Reed, Philippa
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Duval-Chaneac, Marie-Salome, Dani, Gao, Nong, Khan, R.H.U, Giles, Michael, Georgilas, K., Zhao, Xiao and Reed, Philippa
(2022)
Effect of heat treatment on fatigue crack growth in multiple material layered IN718/316L structure fabricated by laser powder bed fusion.
International Journal of Fatigue, 160.
(doi:10.1016/j.ijfatigue.2022.106852).
Abstract
Multi-material specimens of 316L stainless steel and IN718 were produced in a layered architecture by the Laser Powder Bed Fusion (L-PBF) process. Specimens were heat treated at temperatures tailored for the combination of 316L and IN718. The effect of the heat treatment on the microstructure and on the tensile properties across the layers was investigated. Two heat-treated bi-layer specimens (No.1 and No.2) and one heat-treated 4-layer specimen (No.3) were tested under 3 point bending fatigue to compare the crack propagation resistance through multiple sets of dissimilar material interfaces. It was found that the crack propagation resistance overall is mainly controlled by the local microstructural strength, while the interface transition is most significant at lower values of stress intensity factor range (ΔK < 20 MPa√m).
Text
4-M Daval-Chaneac International Journal of Fatigue 160 106852 2022
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Restricted to Repository staff only until 22 March 2024.
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Accepted/In Press date: 10 March 2022
Published date: 22 March 2022
Identifiers
Local EPrints ID: 468332
URI: http://eprints.soton.ac.uk/id/eprint/468332
ISSN: 0142-1123
PURE UUID: 6be57396-b69e-40f8-a81a-2e7b627eff3e
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Date deposited: 10 Aug 2022 18:10
Last modified: 11 Aug 2022 01:53
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Contributors
Author:
Marie-Salome, Dani Duval-Chaneac
Author:
R.H.U Khan
Author:
Michael Giles
Author:
K. Georgilas
Author:
Xiao Zhao
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