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New Routes for Fabricating Ultrafine‐Grained Microstructures in Bulky Steels without Very‐High Strains
Author(s) -
Tsuji Nobuhiro
Publication year - 2010
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/adem.201000018
Subject(s) - materials science , microstructure , austenite , martensite , severe plastic deformation , metallurgy , phase (matter) , nanostructure , deformation (meteorology) , diffusionless transformation , grain size , composite material , nanotechnology , chemistry , organic chemistry
Several routes to produce ultrafine‐grained structures in steels without severe plastic deformation are introduced. The key point of the ideas is to combine plastic deformation with the phase transformation of matrix phases. When as‐quenched martensite in steels is used as a starting microstructure, sub‐micrometer grain‐sized structures can be obtained easily. Another example using a dual‐phase steel composed of soft and hard phases is also discussed. Repeating plastic deformation and phase transformation is also effective in obtaining nanostructures in an austenitic stainless steel. Examples of strips of UFG stainless steels in industry and their applications are presented.