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- Title
Microstructural Influence on Mechanical Properties of a Lightweight Ultrahigh Strength Fe-18Mn-10Al-0.9C-5Ni (wt%) Steel.
- Authors
Piston, Michael; Bartlett, Laura; Limmer, Krista R.; Field, Daniel M.
- 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 °C for up to 50 h, which has been shown in other work to be the result of B2 ordering in the ferrite and κ-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 °C. Charpy V-notch toughness was evaluated at −40 °C in sub-sized specimens with a maximum in the annealed and quenched condition of 28.5 J in the L-T orientation.
- Subjects
LIGHTWEIGHT concrete; NOTCH effect; MECHANICAL heat treatment; PRECIPITATION hardening; TENSILE strength; STEEL; LIGHTWEIGHT steel
- Publication
Metals (2075-4701), 2020, Vol 10, Issue 10, p1305
- ISSN
2075-4701
- Publication type
Article
- DOI
10.3390/met10101305