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Title: Solute segregation at [001] tilt boundaries in dilute f.c.c. alloys

Abstract

Solute segregation has been studied at [001] symmetrical tilt grain boundaries, of the type {Sigma} = 5/(310)/{theta} = 53.13{degree} ({vert_bar}C{vert_bar} structure), in dilute Au-Pt and Ni-Pt alloys at T = 850 K. The computational method is Monte Carlo simulation in conjunction with embedded atom method (EAM) potentials. The results demonstrate that, similar to the previously studied (002) symmetrical twist grain boundaries, segregation occurs differently in the two alloy systems. In Au-Pt the solute is enhanced on the Pt-rich side and depleted on the Au-rich side of the phase diagram. Alternatively, in Ni-Pt the solute is enhanced on both sides of the phase diagram. The distributions of solute atoms at grain boundaries and the implications for interpreting experimental data are discussed in detail. It is demonstrated that it is difficult to deconvolute macroscopic data to obtain microscopic information on the scale of the MC simulations.

Authors:
;  [1]
  1. Northwestern Univ., Evanston, IL (United States)
Publication Date:
OSTI Identifier:
605848
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 46; Journal Issue: 4; Other Information: PBD: 13 Feb 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SEGREGATION; GOLD BASE ALLOYS; PLATINUM ALLOYS; NICKEL BASE ALLOYS; GRAIN BOUNDARIES; BINARY ALLOY SYSTEMS

Citation Formats

Udler, D, and Seidman, D N. Solute segregation at [001] tilt boundaries in dilute f.c.c. alloys. United States: N. p., 1998. Web. doi:10.1016/S1359-6454(97)00297-8.
Udler, D, & Seidman, D N. Solute segregation at [001] tilt boundaries in dilute f.c.c. alloys. United States. https://doi.org/10.1016/S1359-6454(97)00297-8
Udler, D, and Seidman, D N. 1998. "Solute segregation at [001] tilt boundaries in dilute f.c.c. alloys". United States. https://doi.org/10.1016/S1359-6454(97)00297-8.
@article{osti_605848,
title = {Solute segregation at [001] tilt boundaries in dilute f.c.c. alloys},
author = {Udler, D and Seidman, D N},
abstractNote = {Solute segregation has been studied at [001] symmetrical tilt grain boundaries, of the type {Sigma} = 5/(310)/{theta} = 53.13{degree} ({vert_bar}C{vert_bar} structure), in dilute Au-Pt and Ni-Pt alloys at T = 850 K. The computational method is Monte Carlo simulation in conjunction with embedded atom method (EAM) potentials. The results demonstrate that, similar to the previously studied (002) symmetrical twist grain boundaries, segregation occurs differently in the two alloy systems. In Au-Pt the solute is enhanced on the Pt-rich side and depleted on the Au-rich side of the phase diagram. Alternatively, in Ni-Pt the solute is enhanced on both sides of the phase diagram. The distributions of solute atoms at grain boundaries and the implications for interpreting experimental data are discussed in detail. It is demonstrated that it is difficult to deconvolute macroscopic data to obtain microscopic information on the scale of the MC simulations.},
doi = {10.1016/S1359-6454(97)00297-8},
url = {https://www.osti.gov/biblio/605848}, journal = {Acta Materialia},
number = 4,
volume = 46,
place = {United States},
year = {1998},
month = {2}
}