Abstract
Two medium-Mn steels of nominal composition 0.15C-2.0Si-10.5Mn-(0.75, 1.5) Al-0.04Nb-balFe (wt pct) were processed to produce sub-micron grain sizes of 0.65 and 0.80 μm. Mechanical testing was performed in three successive conditions: hot rolled, intercritically annealed, and cold rolled with subsequent intercritical annealing. Intercritical annealing was performed at 923 K for 20 hours. Electron-backscattered diffraction and X-ray diffraction were utilized to characterize the microstructure, consisting of α-ferrite, α-martensite, ε-martensite, and γ-austenite. Microstructural constituents were tracked during tensile deformation, and it was found that both steels exhibited two-stage TRIP with γ-austenite martensitically transforming first to ε-martensite and as strain increased ε-martensite transformed to α-martensite.
Recommended Citation
D. M. Field et al., "Processing and Properties of Medium-Mn TRIP Steel to Obtain a Two-Stage TRIP Behavior," Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, vol. 51, no. 9, pp. 4427 - 4433, Springer; ASM International, Sep 2020.
The definitive version is available at https://doi.org/10.1007/s11661-020-05901-2
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
1073-5623
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Springer; ASM International, All rights reserved.
Publication Date
01 Sep 2020
Comments
National Science Foundation, Grant DMR-0723128