Simultaneous Occurrence of Twinning and Phase Transformation During Yield Point Elongation in Medium Manganese Steels

Simultaneous Occurrence of Twinning and Phase Transformation During Yield Point Elongation in Medium Manganese Steels

In this work, we report nearly 8 pct yield point elongation during deformation of medium Mn steel (Fe–5Mn–0.2C–0.8Si–0.34Al). Detailed investigation of the deformation mechanisms shows that in addition to slip in ferrite and austenite, phase transformation and twinning (TRIP and TWIP) occur simultan...

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Veröffentlicht in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2023, Vol.54 (1), p.6-10
Hauptverfasser: Satyampet, Poornachandra, Bhunia, Subhas, Gururajan, M. P., Pant, Prita
Format: Artikel
Sprache:eng
Schlagworte:
Austenite
Brief Communication
Characterization and Evaluation of Materials
Chemistry and Materials Science
Deformation
Deformation mechanisms
Ductility
Elongation
Grain boundaries
Manganese steels
Materials Science
Metallic Materials
Nanotechnology
Phase transitions
Stacking fault energy
Steel
Structural Materials
Surfaces and Interfaces
Thin Films
Twinning
Yield point
Yield stress
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Zusammenfassung:In this work, we report nearly 8 pct yield point elongation during deformation of medium Mn steel (Fe–5Mn–0.2C–0.8Si–0.34Al). Detailed investigation of the deformation mechanisms shows that in addition to slip in ferrite and austenite, phase transformation and twinning (TRIP and TWIP) occur simultaneously in the austenite phase. This is attributed to differences in Mn concentration in austenite grains which changes the stacking fault energy; thereby altering the dominant deformation mechanism from phase transformation to twinning. Graphical Abstract
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-022-06879-9