期刊
MATERIALS RESEARCH LETTERS
卷 10, 期 9, 页码 585-592出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/21663831.2022.2067504
关键词
Molecular dynamics; precipitates; phase transformation; phase transition
资金
- US Department of Energy, Office of Science, Basic Energy Sciences, Division of Materials Science and Engineering
- U.S. Department of Energy Office of Science User Facility located at Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]
- NERSC [BES-ERCAP0017736]
Using molecular dynamics simulations, this study investigates the deformation-induced phase transition in an Fe-Ni alloy with and without precipitates. The results show that larger precipitates and smaller spacings hinder the phase transformation. These findings help interpret the experimental results and analyze the individual effects of precipitate size and spacing.
Molecular dynamics simulations were used to study deformation-induced face-centered cubic (fcc) to body-centered cubic (bcc) transformation during uniaxial compression of an 80Fe-20Ni (at%) alloy with and without precipitates. Our purpose was to better understand recent experimental results in an Fe-Ni-based medium-entropy alloy where certain precipitates were found to constrain the fcc to bcc transformation. We find that larger precipitates and smaller spacings between precipitates hinder the phase transformation by impeding relaxation of internal elastic strains. These results deconvolute the individual effects of precipitate size and spacing and help interpret the experimental results where only their combined effects could be measured. IMPACT STATEMENT Using atomistic modelling, we investigate the individual effects of precipitate size and spacing in phase transition and help interpret the experimental results where only their combined effects could be measured.
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