Interfacial Effects in Nanostructured Materials
E-MRS Fall Meeting, Warsaw, September 2002
Invited speaker: T.G. Langdon





PROCESSING AND PROPERTIES OF BULK ULTRAFINE-GRAINED MATERIALS PRODUCED
THROUGH SEVERE PLASTIC DEFORMATION, Alexandre P. Zhilyaev, Institute
of Mechanics, Russian Academy of Science, Ufa 450000, Russia, Minoru
Furukawa, Department of Technology, Fukuoka University of Education,
Munakata, Fukuoka 811-4192, Japan, Zenji Horita, Department of
Materials Science and Engineering, Faculty of Engineering, Kyushu
University, Fukuoka 812-8581, Japan, and Terence G. Langdon,
Departments of Aerospace & Mechanical Engineering and Materials
Science, University of Southern California, Los Angeles, CA
90089-1453, U.S.A.
Substantial grain refinement, to the submicrometer or nanometer level,
may be achieved in bulk metallic alloys through processing using
techniques associated with the introduction of severe plastic
deformation (SPD). Procedures available for SPD include Equal-Channel
Angular Pressing (ECAP) where a sample is pressed through a die
constrained within a channel bent through an angle at, or approaching,
90 degrees and High-Pressure Torsion (HPT) where the sample, in the
form of a thin disk, is subjected to a high pressure and concurrent
torsional straining. This paper reviews the two processes of ECAP and
HPT and describes representative results. It is demonstrated that
processing by SPD provides a potential for achieving exceptional
properties in relatively large bulk solids.

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