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Developing Ultrafine Grain Sizes Using Severe Plastic Deformation
Author(s) -
Furukawa M.,
Horita Z.,
Langdon T. G.
Publication year - 2001
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/1527-2648(200103)3:3<121::aid-adem121>3.0.co;2-v
Subject(s) - materials science , superplasticity , misorientation , severe plastic deformation , pressing , metallurgy , alloy , shearing (physics) , grain size , toughness , die (integrated circuit) , composite material , grain boundary , microstructure , nanotechnology
Severe plastic deformation may be used as a processing tool to achieve a refinement in grain size in metallic alloys to the submicrometer or nanometer range. This paper describes recent developments using the procedure of equal‐channel angular pressing (ECAP) in which samples are pressed through a die containing a channel bent into an L‐shaped configuration. The shearing associated with passage through the die introduces bands of subgrains which evolve, with additional pressings, into arrays of grains separated by boundaries having high angles of misorientation. The process of ECAP is a useful tool for both increasing the strength and toughness of an alloy at ambient temperatures and achieving a potential for superplastic forming of the alloy at rapid strain rates at elevated temperatures.