Structure formation in steel 20 at the macro, meso, and nano levels in diffusional austenite decomposition after controllable thermoplastic hardening

Autor:	N. S. Mochalina, L. I. Tushinskii, A. V. Plokhov
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Austenite Thermoplastic Structure formation Nanostructure Materials science Microstructure Crystallographic defect Crystallography chemistry Nano Hardening (metallurgy) General Materials Science Composite material
Zdroj:	Steel in Translation. 38:283-286
ISSN:	1935-0988 0967-0912
DOI:	10.3103/s0967091208040062
Popis:	Recently, a new classification of structures has been proposed, on the basis of three groups: macrostructure (dendritic and polyhedral structure, the size and orientation of grains); mesostructure (structure within grains, cells, polygons, subgrains); and microstructure (linear and point defects, particles of second phase). In dimensional terms, macrostructure corresponds to 10 − 1 ‐10 ‐4 m; mesostructure to 10 ‐4 ‐10 ‐7 m; and microstructure to 10 ‐7 ‐10 ‐9 m. The latter group is also known as nanostructure. It has been shown that, in controlled thermoplastic hardening, the structure of steel may be regulated at all three dimensional levels. The decrease in austenite grain size is the macro level; the creation of regular dislocational structures in small grains is the meso level; and the formation of a second phase in the ferrite‐pearlite structure after diffusional transformation of small particles (plates) is the nano level.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cdcec38a3bf168c1b86d07452d5d44ab https://doi.org/10.3103/s0967091208040062 Zobrazit plný text záznamu Full text from SpringerLink