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

Autor:	M. A. Bashirova, N. N. Ozerets, M. S. Khadyev, A. A. Gusev, V. A. Khotinov, M. A. Gervas’ev
Rok vydání:	2020
Předmět:	010302 applied physics Austenite Quenching Materials science fungi Twip technology industry and agriculture Metals and Alloys 02 engineering and technology Strain hardening exponent Condensed Matter Physics Microstructure 01 natural sciences 020501 mining & metallurgy 0205 materials engineering Mechanics of Materials Stacking-fault energy Martensite 0103 physical sciences Composite material Ductility
Zdroj:	Metal Science and Heat Treatment. 62:183-187
ISSN:	1573-8973 0026-0673
DOI:	10.1007/s11041-020-00534-z
Popis:	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.
Databáze:	OpenAIRE
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