Deformation twinning-induced dynamic recrystallization during laser powder bed fusion
Deformation twinning-induced dynamic recrystallization during laser powder bed fusion
Nanotwin formation is observed during laser powder bed fusion (LPBF) of austenitic stainless steels fabricated with various process parameters. Transmission electron microscopy was employed to reveal the nature of such twins, which are formed due to the high strain rapid solidification inherent to LPBF. Dynamic recrystallization (DRX) was also activated during LPBF, and induced by the deformation nanotwins. A thermostatistical model is proposed to determine the critical conditions for twinning-induced DRX; the model is validated with the reported experimental results. This modelling approach offers a method to microstructurally engineer austenitic stainless steels for potential applications needing high strength and ductility.
Austenitic stainless steel, Dynamic recrystallization, Laser powder bed fusion, Transmission electron microscopy, Twinning
Sabzi, Hossein Eskandari
767d5a23-489d-455f-80d0-bad990b42783
Li, Xiao Hui
61cbda8d-ab83-4fff-80a6-3e1e92d1d93a
Zhang, Chi
75e54093-1e0b-4db2-8cdd-5982b1dfa626
Fu, Hanwei
5bfa8370-2f21-436c-8c78-ce414d925d94
San-Martín, David
3cb4e081-1f6f-4f63-a25f-30613c3288a1
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
1 October 2021
Sabzi, Hossein Eskandari
767d5a23-489d-455f-80d0-bad990b42783
Li, Xiao Hui
61cbda8d-ab83-4fff-80a6-3e1e92d1d93a
Zhang, Chi
75e54093-1e0b-4db2-8cdd-5982b1dfa626
Fu, Hanwei
5bfa8370-2f21-436c-8c78-ce414d925d94
San-Martín, David
3cb4e081-1f6f-4f63-a25f-30613c3288a1
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Sabzi, Hossein Eskandari, Li, Xiao Hui, Zhang, Chi, Fu, Hanwei, San-Martín, David and Rivera-Díaz-del-Castillo, Pedro E.J.
(2021)
Deformation twinning-induced dynamic recrystallization during laser powder bed fusion.
Scripta Materialia, 207, [114307].
(doi:10.1016/j.scriptamat.2021.114307).
Abstract
Nanotwin formation is observed during laser powder bed fusion (LPBF) of austenitic stainless steels fabricated with various process parameters. Transmission electron microscopy was employed to reveal the nature of such twins, which are formed due to the high strain rapid solidification inherent to LPBF. Dynamic recrystallization (DRX) was also activated during LPBF, and induced by the deformation nanotwins. A thermostatistical model is proposed to determine the critical conditions for twinning-induced DRX; the model is validated with the reported experimental results. This modelling approach offers a method to microstructurally engineer austenitic stainless steels for potential applications needing high strength and ductility.
Text
1-s2.0-S135964622100587X-main
- Version of Record
More information
Accepted/In Press date: 19 September 2021
e-pub ahead of print date: 1 October 2021
Published date: 1 October 2021
Keywords:
Austenitic stainless steel, Dynamic recrystallization, Laser powder bed fusion, Transmission electron microscopy, Twinning
Identifiers
Local EPrints ID: 492228
URI: http://eprints.soton.ac.uk/id/eprint/492228
ISSN: 1359-6462
PURE UUID: 6f862c81-f763-440d-bac1-17f0a6c27fc2
Catalogue record
Date deposited: 22 Jul 2024 16:58
Last modified: 23 Jul 2024 02:08
Export record
Altmetrics
Contributors
Author:
Hossein Eskandari Sabzi
Author:
Xiao Hui Li
Author:
Chi Zhang
Author:
Hanwei Fu
Author:
David San-Martín
Author:
Pedro E.J. Rivera-Díaz-del-Castillo
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics