Structural Ultrafine Grained Steels Obtained by Advanced Controlled Rolling

García García, José Ovidio; Barbés Fernández, Miguel Ángel; Verdeja González, Luis Felipe; Verdeja González, José Ignacio; Gonzalez-Ojeda, Roberto; Quintana, María José

doi:10.1016/S1006-706X(13)60046-1

Structural Ultrafine Grained Steels Obtained by Advanced Controlled Rolling

Journal

Journal of Iron and Steel Research International

ISSN

1006-706X

2210-3988

Date Issued

2013

Author(s)

García García, José Ovidio

Barbés Fernández, Miguel Ángel

Verdeja González, Luis Felipe

Verdeja González, José Ignacio

Gonzalez-Ojeda, Roberto

Facultad de Ingeniería - CampCM

Quintana, María José

Facultad de Ingeniería - CampCM

Type

text::journal::journal article

DOI

10.1016/S1006-706X(13)60046-1

URL

https://scripta.up.edu.mx/handle/20.500.12552/4499

Abstract

Steels with ultrafine grains (lower than 5 μpa), which usually known as ultrafine ferrite or ultrafine grained materials, are presently the object of intense research, because of the improvement in resistance and fracture toughness they may reach compared to conventional steels (with grain sizes above this value). It is shown that the forenamed steels designated in the Euronorm EN 10149-2, which are manufactured by advanced techniques of controlled rolling and mainly used in automotive industry, have an ultrafine grain size in the range of 2. 5 to 3. 5 μm, and with elastic yield stresses higher than 400 MPa. Based on the Morrison-Miller criterion, it is shown that values of the strain-hardening coefficient lower than 0. 08 would make the industrial application of these steels unfeasible.