Microstructural Parameters of Cold‐Rolled and Annealed Fe–24Mn–3Al–1Ni–2Si–0.06C Steel Obtained by X‐Ray Diffraction

Twinning‐induced plasticity steel is characterized by the presence of twins and austenite at room temperature. In this work, Fe–24Mn–3Al–1Ni–2Si–0.06C steel is cold‐rolled at 30, 50, and 80% thickness reduction and subsequently annealed at temperatures between 300 and 1100 °C for 15 min. The microst...

Full description

Saved in:
Bibliographic Details
Published inSteel research international Vol. 95; no. 2
Main Authors de Lima, Janaína Rosa, Siqueira, Guilherme Oliveira, Freitas Neto, Ernesto Soares, Nakagomi, Fábio, Santos, Dagoberto Brandão, Renzetti, Reny Angela
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 01.02.2024
Subjects
Annealing
Cold rolling
Dislocation density
Hardness
Microstructure
Parameters
Recrystallization
Reduction
Room temperature
Stacking faults
Thickness
twins
TWIP steels
X-Ray diffraction
Online AccessGet full text

Cover

More Information
Summary:Twinning‐induced plasticity steel is characterized by the presence of twins and austenite at room temperature. In this work, Fe–24Mn–3Al–1Ni–2Si–0.06C steel is cold‐rolled at 30, 50, and 80% thickness reduction and subsequently annealed at temperatures between 300 and 1100 °C for 15 min. The microstructure and hardness are analyzed, and dislocation density, stacking fault, and twin probability are calculated using the diffraction method based on the intensity of X‐rays generated in a synchrotron facility. The Rietveld analysis using Materials Analysis Using Diffraction (MAUD) software is performed, and Popa Model is employed. Cold rolling increases hardness due to the formation of deformation twins, stacking fault, and dislocation in different degrees depending on the thickness reduction. During annealing, recrystallization influences the parameters obtained by X‐Ray diffraction such as stacking fault probability and dislocation density. This article reports on an investigation of how thermal treatment and cold rolling affect the microstructure and hardness of Fe–24Mn–3Al–1Ni–2Si–0.06C alloy, a Twip steel with potential for applications in automotive and aerospace industries. The technique of high‐resolution X‐ray diffraction is used. The mechanisms responsible for the changes are discussed based on the microstructural observations.
ISSN:1611-3683
1869-344X
DOI:10.1002/srin.202300364