Grain refinement and mechanical properties of low-carbon steel by means of equal channel angular pressing and annealing

Autor:	Hans Jürgen Maier, Elena G. Astafurova, George Raab, Galina G. Mayer, Sergey V. Dobatkin, Eugene V. Naydenkin, P. D. Odessky
Rok vydání:	2013
Předmět:	Pressing Materials science Carbon steel Annealing (metallurgy) Metallurgy Metals and Alloys engineering.material Condensed Matter Physics Microstructure Indentation hardness Grain size Carbide Precipitation hardening Materials Chemistry engineering Physical and Theoretical Chemistry
Zdroj:	International Journal of Materials Research. 104:457-461
ISSN:	2195-8556 1862-5282
Popis:	Equal channel angular pressing of low-carbon steel produces an ultrafine-grained microstructure with an average (sub-)grain size of 325 nm and both coarse and fine carbides, a microhardness of 330 HV and 0.2 % offset yield strength of σ0.2 = 815 MPa. The average (sub-)grain size and the mechanical properties of the steel after equal channel angular pressing were found to be stable up to 500 °C. The composition of the carbides, their sizes and their distribution in the microstructure were analyzed in order to understand their contribution to the mechanical properties and the thermal stability of the steel. Both the high strength and the thermal stability of the steel after equal channel angular pressing are associated with the grain refinement, the substructure strengthening, and precipitation hardening.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::828c133cbee76a54b0b0155715988a4c https://doi.org/10.3139/146.110886 Zobrazit plný text záznamu