Title

Thermodynamic and kinetic analysis of the melt spinning process of Fe-6.5 wt.% Si alloy

Publication Date

8-31-2018

Department

Ames Laboratory; Aerospace Engineering; Materials Science and Engineering; Mechanical Engineering

Campus Units

Ames Laboratory, Aerospace Engineering, Materials Science and Engineering, Mechanical Engineering

OSTI ID+

1481871

Report Number

IS-J 9783

DOI

10.1016/j.jallcom.2018.08.293

Journal Title

Journal of Alloys and Compounds

Volume Number

771

First Page

643

Last Page

648

Abstract

The microstructural evolution of Fe-6.5 wt.% Si alloy during rapid solidification was studied over a quenching rate of 4 × 104 K/s to 8 × 105 K/s. The solidification and solid-state diffusional transformation processes during rapid cooling were analyzed via thermodynamic and kinetic calculations. The Allen-Cahn theory was adapted to model the experimentally measured bcc_B2 antiphase domain sizes under different cooling rates. The model was calibrated based on the experimentally determined bcc_B2 antiphase domain sizes for different wheel speeds and the resulting cooling rates. Good correspondence of the theoretical and experimental data was obtained over the entire experimental range of cooling rates. Along with the asymptotic domain size value at the infinite cooling rates, the developed model represents a reliable extrapolation for the cooling rate > 106 K/s and allows one to optimize the quenching process.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Department of Energy Subject Categories

36 MATERIALS SCIENCE

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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