Changes in Microstructure and Strain Hardening of High-Manganese Steels Under Tension

Sparingly alloyed high-manganese austenitic steels 40G20 and 25G20S3 are studied. The phase composition, the structure and the mechanical properties of the steels are determined after quenching from the austenitic range, and their variation during tension of standard specimens is studied by the meth...

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Bibliographic Details
Published in:Metal science and heat treatment 2020-07, Vol.62 (3-4), p.183-187
Main Authors: Gervas’ev, M. A., Khotinov, V. A., Ozerets, N. N., Khadyev, M. S., Bashirova, M. A., Gusev, A. A.
Format: Article
Language:English
Subjects:
Alloying
Austenitic stainless steels
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Diffraction
Engineering Thermodynamics
Heat and Mass Transfer
Manganese steels
Martensite
Materials Science
Mechanical properties
Mechanical tests
Metallic Materials
Phase composition
Stacking fault energy
Steel
Strain hardening
Structural Steels
TWIP steels
X-rays
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Summary:Sparingly alloyed high-manganese austenitic steels 40G20 and 25G20S3 are studied. The phase composition, the structure and the mechanical properties of the steels are determined after quenching from the austenitic range, and their variation during tension of standard specimens is studied by the methods of transmission electron microscopy and x-ray diffraction analysis. The characteristics of strain hardening of the steels are determined from the results of the mechanical tests. It is shown that the strain develops either by twinning (TWIP effect, steel 40G20) or due to formation of strain martensite (TRIP effect, steel 25G20S3) depending on the stacking fault energy. The change in the strain mechanism changes the strain hardening and the strength and ductility properties of the steels.
ISSN:0026-0673
1573-8973
DOI:10.1007/s11041-020-00534-z