Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/94222
Title: | Cu-assisted austenite reversion and enhanced TRIP effect in maraging stainless steels | Authors: | Niu, MC Yang, K Luan, JH Wang, W Jiao, ZB |
Issue Date: | 30-Mar-2022 | Source: | Journal of materials science and technology (Brazil), 30 Mar. 2022, v. 104, p. 52-58 | Abstract: | Control of the formation and stability of reverted austenite is critical in achieving a favorable combination of strength, ductility, and toughness in high-strength steels. In this work, the effects of Cu precipitation on the austenite reversion and mechanical properties of maraging stainless steels were investigated by atom probe tomography, transmission electron microscopy, and mechanical tests. Our results indicate that Cu accelerates the austenite reversion kinetics in two manners: first, Cu, as an austenite stabilizer, increases the equilibrium austenite fraction and hence enhances the chemical driving force for the austenite formation, and second, Cu-rich nanoprecipitates promote the austenite reversion by serving as heterogeneous nucleation sites and providing Ni-enriched chemical conditions through interfacial segregation. In addition, the Cu precipitation hardening compensates the strength drop induced by the formation of soft reverted austenite. During tensile deformation, the metastable reverted austenite transforms to martensite, which substantially improves the ductility and toughness through a transformation-induced plasticity (TRIP) effect. The Cu-added maraging stainless steel exhibits a superior combination of a yield strength of ∼1.3 GPa, an elongation of ∼15%, and an impact toughness of ∼58 J. | Keywords: | Austenite reversion Cu-rich nanoprecipitate Maraging stainless steel TRIP effect |
Publisher: | Elsevier Editora Ltda | Journal: | Journal of materials science and technology (Brazil) | ISSN: | 2238-7854 | EISSN: | 2214-0697 | DOI: | 10.1016/j.jmst.2021.06.055 | Rights: | © 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Niu, M. C., Yang, K., Luan, J. H., Wang, W., & Jiao, Z. B. (2022). Cu-assisted austenite reversion and enhanced TRIP effect in maraging stainless steels. Journal of Materials Science & Technology, 104, 52-58 is available at https://dx.doi.org/10.1016/j.jmst.2021.06.055. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Niu_Cu-Assisted_Austenite_Reversion.pdf | Pre-Published version | 2.54 MB | Adobe PDF | View/Open |
Page views
58
Last Week
1
1
Last month
Citations as of May 5, 2024
Downloads
3
Citations as of May 5, 2024
SCOPUSTM
Citations
36
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
30
Citations as of Apr 4, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.