TY - JOUR

T1 - Superstrength of nanostructured metals and alloys produced by severe plastic deformation

AU - Valiev, R. Z.

AU - Murashkin, M. Yu

AU - Ganeev, A. V.

AU - Enikeev, N. A.

PY - 2012/12

Y1 - 2012/12

N2 - Metals and alloys produced by severe plastic deformation (SPD) are characterized by not only an ultrafine grain size, but also other structural features, such as nonequilibrium grain boundaries, nanotwins, grain-boundary segregations, and nanoparticles. The present work deals with the study of the effect of these features on the strength of SPD metals and alloys. In particular, it has been shown that, with segregations on grain boundaries and nonequilibrium boundaries, the yield stress of the material can exceed considerably the values extrapolated to the range of ultrafine grains using the Hall-Petch relationship.

AB - Metals and alloys produced by severe plastic deformation (SPD) are characterized by not only an ultrafine grain size, but also other structural features, such as nonequilibrium grain boundaries, nanotwins, grain-boundary segregations, and nanoparticles. The present work deals with the study of the effect of these features on the strength of SPD metals and alloys. In particular, it has been shown that, with segregations on grain boundaries and nonequilibrium boundaries, the yield stress of the material can exceed considerably the values extrapolated to the range of ultrafine grains using the Hall-Petch relationship.

KW - grain-boundary segregations

KW - Hall-Petch relationship

KW - nonequilibrium grain boundaries

KW - severe plastic deformation

KW - strength

KW - ultra-fine-grained materials

UR - http://www.scopus.com/inward/record.url?scp=84874462142&partnerID=8YFLogxK

U2 - 10.1134/S0031918X12130042

DO - 10.1134/S0031918X12130042

M3 - Article

AN - SCOPUS:84874462142

VL - 113

SP - 1193

EP - 1201

JO - Physics of Metals and Metallography

JF - Physics of Metals and Metallography

SN - 0031-918X

IS - 13

ER -