Comments on kinetic models for recrystallization

Journal Article · Tue Jan 01 04:00:00 EST 1985 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(85)90359-X· OSTI ID:5701761

Price, C W

Early mathematical studies of the kinetics of recrystallization in metals conducted independently by Johnson and Mehl and Avrami produced the now-familiar relation between recrystallized volume fraction, f, and time, t: f = 1 - exp(B t/sup n/), where B and n are constants. This relation yields linear plots of log (1n (1/(1 - f))) against log t at constant temperature. Recent recrystallization studies at LLNL to select the model best suited for representation of kinetic recrystallization data are discussed. Commercially pure (99.8%) vanadium was used for the recrystallization study. To facilitate detection of recrystallized grains, the vanadium was annealed to produce a large grain size of about 800 ..mu..m. Specimens selected were cold rolled to a reduction of 90% and then annealed for 10, 30, 60, and 240 minutes at 800, 900, and 1000 C. A metallographic technique was developed to selectively etch deformation structures in the specimens. Values of f were obtained by careful visual estimates from the etched specimens and plotted in various forms.

• Research Organization: Lawrence Livermore Lab., CA
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5701761
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 19:5; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ELEMENTS
KINETICS
MATHEMATICAL MODELS
METALS
RECRYSTALLIZATION
TRANSITION ELEMENTS
VANADIUM