Article
Microstructural Influence on Mechanical Properties of a Lightweight Ultrahigh Strength Fe-18Mn-10Al-0.9C-5Ni (wt%) Steel
Metals
Abstract
This study evaluates the role of thermomechanical processing and heat treatment on the microstructure and mechanical properties of a hot rolled, annealed, and aged Fe-18Mn-10Al-0.9C-5Ni (wt%) steel. The steel exhibited rapid age hardening kinetics when aged in the temperature range of 500-600 ⁰C for up to 50 h, which has been shown in other work to be the result of B2 ordering in the ferrite and K-carbide precipitation within the austenite matrix. The ultimate tensile strength increased from 1120 MPa in the annealed condition to 1230 MPa after 2 h of aging at 570 ⁰C. Charpy V-notch toughness was evaluated at -40 ⁰C in sub-sized specimens with a maximum in the annealed and quenched condition of 28.5 J in the L-T orientation.
Department(s)
Materials Science and Engineering
Keywords and Phrases
- Age Hardening,
- B2,
- Fe-Mn-Al-C,
- Kappa Carbide,
- Lightweight Steel,
- NiAl
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2020 The Authors, All rights reserved.
Creative Commons Licensing
Creative Commons Attribution 4.0
Publication Date
10-1-2020
Publication Date
01 Oct 2020
Disciplines
Citation Information
Michael Piston, Laura Bartlett, Krista R. Limmer and Daniel M. Field. "Microstructural Influence on Mechanical Properties of a Lightweight Ultrahigh Strength Fe-18Mn-10Al-0.9C-5Ni (wt%) Steel" Metals Vol. 10 Iss. 10 (2020) p. 1 - 14 ISSN: 2075-4701 Available at: http://works.bepress.com/laura-bartlett/38/
This research was sponsored in part by the DLA-Troop Support, Philadelphia, PA and the Defense Logistics Agency Logistics Operations, J68, Research & Development, Ft. Belvoir, VA under a subcontract from Steel Founders’ Society of America, contract number SP4701-17-D-1161. Funding for this project was also received from the Army Research Office under contract number W911NF-19-2-0044.