Nanolath martensite-austenite structures engineered through DQ&P processing for developing tough, ultrahigh strength steels |
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Author: | Ghosh, Sumit1; Miettunen, Ilkka1; Somani, Mahesh C.1; |
Organizations: |
1University of Oulu, Faculty of Technology, Centre for Advanced Steels Research, 90014 Oulu, Finland |
Format: | article |
Version: | published version |
Access: | open |
Online Access: | PDF Full Text (PDF, 1.2 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe202103167509 |
Language: | English |
Published: |
Elsevier,
2021
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Publish Date: | 2021-03-16 |
Description: |
AbstractA novel processing route comprising thermomechanical rolling followed by direct quenching and partitioning (DQ&P) was designed for developing tough, ductile, ultrahigh strength steels using 0.4 wt% carbon steels. A preliminary characterization of a laboratory-rolled, high-silicon DQ&P steel revealed an excellent combination of mechanical properties comprising high yield and tensile strengths (~1025 and ~2137 MPa, respectively), besides reasonable elongation (≈ 12%) and good impact toughness (T28J temperature ≈ −10 °C). The high mechanical properties are attributed to the formation of desired nanolath martensite-retained austenite (≈ 15%) structures. Features such as nano-twinned martensite, interlath austenite etc. were comprehensively characterized through high-resolution transmission electron microscopy. Attempts have been made to detect possible existence of metastable hexagonal omega phase within the boundaries of nano-twinned martensite and understand its nature of formation. see all
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Series: |
Materials today. Proceedings |
ISSN: | 2214-7853 |
ISSN-E: | 2214-7853 |
ISSN-L: | 2214-7853 |
Volume: | 46 |
Pages: | 2131 - 2134 |
DOI: | 10.1016/j.matpr.2021.02.344 |
OADOI: | https://oadoi.org/10.1016/j.matpr.2021.02.344 |
Host publication: |
Materials today : proceedings |
Conference: |
International Conference on Multifunctional Nanomaterials |
Type of Publication: |
A4 Article in conference proceedings |
Field of Science: |
216 Materials engineering |
Subjects: | |
Funding: |
The authors express their gratitude to the Academy of Finland to provide resources under the auspices of the Genome of Steel (Profi3) project #311934. |
Copyright information: |
© 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Multifunctional Nanomaterials. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |