Design of a hot deformation processing map for a Ni-free, N-bearing austenitic stainless steel |
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Author: | Khorshidi, H.1; Kermanpur, A.1; Rastegari, H.2; |
Organizations: |
1Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran 2Department of Mechanical and Materials Engineering, Birjand University of Technology, South Khorasan, 97198-66981, Iran 3Department of Materials and Manufacturing, School of Engineering, Jönköping University, Jönköping, Sweden
4Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, 90014, Oulu, Finland
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Format: | article |
Version: | accepted version |
Access: | embargoed |
Persistent link: | http://urn.fi/urn:nbn:fi-fe2022020317444 |
Language: | English |
Published: |
Elsevier,
2021
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Publish Date: | 2023-04-22 |
Description: |
AbstractThe hot deformation characteristics of a FeCrMnN austenitic stainless steel containing 0.28 wt.% nitrogen (N) was investigated by hot compression tests using a Gleeble simulator in the temperature range of 800−1200 °C and at constant true strain rates of 0.01–10 s−1 with all specimens deformed to ∼0.9 true strain. The influence of deformation conditions on microstructural mechanisms and phase transformations was characterized. A processing map based on dynamic materials modelling (DMM) was designed and interpreted for predicting the domain of stable flow for safe, defect-free hot deformation. The results revealed the occurrence of dynamic recrystallization (DRX) in a domain extending over the temperature and strain rate ranges of 1100−1200 °C and 0.1–1 s−1, respectively, with the efficiency of power dissipation (η) of 45–55 %. Decreasing temperature and increasing strain rate led to a reduction in DRX grain size following microstructural reconstitution. Another small deterministic domain of 820−1000 °C and 0.01−0.05 s−1 was identified showing occurrence of partial DRX in shear bands leading to formation of a mixed microstructure. The instability criteria delineated the regime of unstable flow covering a large part of the processing map extending over low temperatures (800−950 °C) and high strain rates (0.1–10 s−1) that must be avoided during processing. see all
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Series: |
Materials today communications |
ISSN: | 2352-4928 |
ISSN-E: | 2352-4928 |
ISSN-L: | 2352-4928 |
Volume: | 27 |
Article number: | 102352 |
DOI: | 10.1016/j.mtcomm.2021.102352 |
OADOI: | https://oadoi.org/10.1016/j.mtcomm.2021.102352 |
Type of Publication: |
A1 Journal article – refereed |
Field of Science: |
216 Materials engineering |
Subjects: | |
Copyright information: |
© 2021 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |