Recrystallization and precipitation interaction in Nb-containing steels

Journal Article · Fri Mar 05 04:00:00 EST 1999 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(99)00026-3· OSTI ID:347544

Lee, K J ^[1]

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1. Pohang Iron and Steel Co., Ltd. (Korea, Republic of). Technical Research Labs.

Nb-containing micro-alloyed steels have been of a great interest because of the beneficial effect of a small amount of Nb on mechanical properties. This effect is mostly associated with the formation of very fine Nb(C,N) carbonitrides in austenite and ferrite or during {gamma}/{alpha} transformation. Thus, dissolution and precipitation of Nb(C,N) in steels and their interaction with recrystallization and {gamma}/{alpha} transformation should be clearly understood. In this study, computer simulation of Nb-containing steels was carried out by adopting a classical nucleation and growth theory for precipitation and an Avrami-type equation for recrystallization. The retardation effect of precipitation on recrystallization was treated by modifying pinning force on recrystallization start time (R{sub s}). The effect of recrystallization on precipitation was also treated by the reduction of strain-induced driving force for nucleation and the reduction of available nucleation sites.

• OSTI ID: 347544
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 7 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
KINETICS
MATHEMATICAL MODELS
METALLURGICAL EFFECTS
NIOBIUM ADDITIONS
NUCLEATION
PRECIPITATION
RECRYSTALLIZATION
STEELS