Abstract
Ultrafine-grained materials having grain sizes of tens and hundreds of nanometers, that offer much improved mechanical and physical properties, recently have aroused great interest among researchers in the materials science. The aim of this work is to study submicron-scale substructure evolution in a 304 type stainless steel caused by severe warm deformation at 0.5 T{sub m}. The effects of strain-induced grain boundaries on the internal stresses and the related lattice distortions evolved in these grain interiors are discussed in detail.
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