Static recrystallization of strip cast alloys in the presence of complex nano-sulfide and nitride precipitates
Date
2013
Authors
Malekjani, S.
Timokhina, I.B.
Wang, J.
Hodgson, P.D.
Stanford, N.E.
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Materials Science & Engineering: A, 2013; 581:39-47
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Abstract
The static recrystallization of three strip cast stainless steels including one ferritic stainless steel, one austenitic stainless steel and a 201 stainless steel was investigated in the present work. The samples were obtained from a laboratory scale strip casting simulator and were subjected to cold rolling and annealing. It is shown that the strip cast samples develop nano-precipitates which in the case of austenitic and ferritic stainless steels can significantly hinder the recrystallization kinetics. Two different precipitate species were identified: sulfides and nitrides. The sulfides are formed in the as-cast structure and hinder recrystallization. These can be coarsened by heat treatment to make recrystallization more rapid. The nitrides, however, are in solution in the as-cast condition and only retard the recrystallization after a heat treatment has been used to cause their precipitation.
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Copyright 2013 Elsevier BV