Effect of substitutional Ni atoms on the Snoek relaxation in ferrite and martensite Fe-C alloys: An atomistic investigation

Quantitative simulations of the carbon-induced internal friction in ferrite/martensite Fe-C and Fe-Ni-C alloys are performed by combining a mean-field elastic model and the atomistic kinetic Monte Carlo based on a pair interaction model to describe the composition-dependent carbon migration. The sim...

Full description

Saved in:
Bibliographic Details
Published inComputational Materials Science Vol. 203
Main Authors Huang, Liangzhao, Maugis, Philippe
Format Paper
LanguageEnglish
Published Elsevier 01.02.2022
Subjects
Condensed Matter
Materials Science
Physics
Statistical Mechanics
Anelastic behavior
Internal friction
Carbon steels
Mean-field modeling
Monte Carlo simulation
Online AccessGet full text

Cover

More Information
Summary:Quantitative simulations of the carbon-induced internal friction in ferrite/martensite Fe-C and Fe-Ni-C alloys are performed by combining a mean-field elastic model and the atomistic kinetic Monte Carlo based on a pair interaction model to describe the composition-dependent carbon migration. The simulation is validated by experimental data and a thermo-kinetic theory. Our results predict that (i) additional peaks occur in the internal friction profiles of Fe-C and Fe-Ni-C due to C-C and Ni-C pair interactions; (ii) the Ni-alloying shifts the internal friction peak to lower temperature than in Fe-C alloys; (iii) the peak temperature is not simply related to the most frequent carbon jumps during the relaxation process; (iv) the internal friction behavior in martensite depends on the excitation direction with respect to the carbon ordering direction.
ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2021.111083