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Title: The Role of Grain Boundary Energy on Grain Boundary Complexion Transitions

Abstract

Grain boundary complexions are distinct equilibrium structures and compositions of a grain boundary and complexion transformations are transition from a metastable to an equilibrium complexion at a specific thermodynamic and geometric conditions. Previous work indicates that, in the case of doped alumina, a complexion transition that increased the mobility of transformed boundaries and resulted in abnormal grain growth also caused a decrease in the mean relative grain boundary energy as well as an increase in the anisotropy of the grain boundary character distribution (GBCD). The current work will investigate the hypothesis that the rates of complexion transitions that result in abnormal grain growth (AGG) depend on grain boundary character and energy. Furthermore, the current work expands upon this understanding and tests the hypothesis that it is possible to control when and where a complexion transition occurs by controlling the local grain boundary energy distribution.

Authors:
 [1];  [1]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1323555
Report Number(s):
SAND2014-17800
537586
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Bojarski, Stephanie A., and Rohrer, Gregory S.. The Role of Grain Boundary Energy on Grain Boundary Complexion Transitions. United States: N. p., 2014. Web. doi:10.2172/1323555.
Bojarski, Stephanie A., & Rohrer, Gregory S.. The Role of Grain Boundary Energy on Grain Boundary Complexion Transitions. United States. doi:10.2172/1323555.
Bojarski, Stephanie A., and Rohrer, Gregory S.. Mon . "The Role of Grain Boundary Energy on Grain Boundary Complexion Transitions". United States. doi:10.2172/1323555. https://www.osti.gov/servlets/purl/1323555.
@article{osti_1323555,
title = {The Role of Grain Boundary Energy on Grain Boundary Complexion Transitions},
author = {Bojarski, Stephanie A. and Rohrer, Gregory S.},
abstractNote = {Grain boundary complexions are distinct equilibrium structures and compositions of a grain boundary and complexion transformations are transition from a metastable to an equilibrium complexion at a specific thermodynamic and geometric conditions. Previous work indicates that, in the case of doped alumina, a complexion transition that increased the mobility of transformed boundaries and resulted in abnormal grain growth also caused a decrease in the mean relative grain boundary energy as well as an increase in the anisotropy of the grain boundary character distribution (GBCD). The current work will investigate the hypothesis that the rates of complexion transitions that result in abnormal grain growth (AGG) depend on grain boundary character and energy. Furthermore, the current work expands upon this understanding and tests the hypothesis that it is possible to control when and where a complexion transition occurs by controlling the local grain boundary energy distribution.},
doi = {10.2172/1323555},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 2014},
month = {Mon Sep 01 00:00:00 EDT 2014}
}

Technical Report:

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