Factors affecting texture memory appearing through α → γ → α transformation in IF steels

Abstract

In case where IF steel is heat treated in γ region, α → γ → αtransformation during heating and cooling, i.e. α → γ → α transformation, take place during heating and cooling, respectively. The initial texture of α is potentially weakened due to two times transformation in general. On the contrary, the α → γ → α transformed texture resembles the initial texture clearly under specific circumstances. Authors call this phenomenon "texture memory". A very distinct texture memory effect was found in IF steels. Lowering the γ → α transformation temperature pronounces texture memory significantly. The variant selection at grain boundary of γ seems to play an important role. Moreover, it is considered that the initial α texture has to be sharp to in order to realize texture memory. © 2007 The Japan Institute of Metals.