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Title: Segregation to and structure of [001] twist grain boundaries in Cu-Ni alloys

Abstract

The segregation, thermodynamic, and structural properties of [001] twist boundaries in Cu-Ni alloys have been examined within a wide range of misorientations and temperatures. Cu always segregates to the boundary. The concentration of the first layer adjacent to the boundary increases monotonically with misorientation and no obvious cusps are observed. All other thermodynamic properties vary smoothly with the misorientation, with the exception of the vibrational entropy of the boundaries without segregation. The unsegregated vibrational entropy shows a large peak at the misorientation corresponding to the [Sigma]17 boundary and two minima around the [Sigma]13 and [Sigma]5 boundary orientations. The concentration distribution within the plane of the grain boundaries can be described by the same structural unit model established for [001] twist boundaries in pure materials. Regions of large tensile stress show greater segregation than do regions of compressive stress. Regions of large shear stress tend to show reduced segregation compared with regions of small shear stress.

Authors:
; ;  [1];  [2]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
  2. Los Alamos National Lab., NM (United States). Theoretical Div.
Publication Date:
OSTI Identifier:
6052761
Resource Type:
Journal Article
Journal Name:
Acta Metallurgica et Materialia; (United States)
Additional Journal Information:
Journal Volume: 41:9; Journal ID: ISSN 0956-7151
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER ALLOYS; GRAIN BOUNDARIES; NICKEL ALLOYS; BINARY ALLOY SYSTEMS; FREE ENERGY; GRAIN ORIENTATION; SEGREGATION; STRESSES; TEMPERATURE RANGE 0400-1000 K; THEORETICAL DATA; THERMODYNAMIC PROPERTIES; ALLOY SYSTEMS; ALLOYS; DATA; ENERGY; INFORMATION; MICROSTRUCTURE; NUMERICAL DATA; ORIENTATION; PHYSICAL PROPERTIES; TEMPERATURE RANGE; 360102* - Metals & Alloys- Structure & Phase Studies

Citation Formats

Wang, H Y, Najafabadi, R, Srolovitz, D J, and Lesar, R. Segregation to and structure of [001] twist grain boundaries in Cu-Ni alloys. United States: N. p., 1993. Web. doi:10.1016/0956-7151(93)90123-A.
Wang, H Y, Najafabadi, R, Srolovitz, D J, & Lesar, R. Segregation to and structure of [001] twist grain boundaries in Cu-Ni alloys. United States. https://doi.org/10.1016/0956-7151(93)90123-A
Wang, H Y, Najafabadi, R, Srolovitz, D J, and Lesar, R. 1993. "Segregation to and structure of [001] twist grain boundaries in Cu-Ni alloys". United States. https://doi.org/10.1016/0956-7151(93)90123-A.
@article{osti_6052761,
title = {Segregation to and structure of [001] twist grain boundaries in Cu-Ni alloys},
author = {Wang, H Y and Najafabadi, R and Srolovitz, D J and Lesar, R},
abstractNote = {The segregation, thermodynamic, and structural properties of [001] twist boundaries in Cu-Ni alloys have been examined within a wide range of misorientations and temperatures. Cu always segregates to the boundary. The concentration of the first layer adjacent to the boundary increases monotonically with misorientation and no obvious cusps are observed. All other thermodynamic properties vary smoothly with the misorientation, with the exception of the vibrational entropy of the boundaries without segregation. The unsegregated vibrational entropy shows a large peak at the misorientation corresponding to the [Sigma]17 boundary and two minima around the [Sigma]13 and [Sigma]5 boundary orientations. The concentration distribution within the plane of the grain boundaries can be described by the same structural unit model established for [001] twist boundaries in pure materials. Regions of large tensile stress show greater segregation than do regions of compressive stress. Regions of large shear stress tend to show reduced segregation compared with regions of small shear stress.},
doi = {10.1016/0956-7151(93)90123-A},
url = {https://www.osti.gov/biblio/6052761}, journal = {Acta Metallurgica et Materialia; (United States)},
issn = {0956-7151},
number = ,
volume = 41:9,
place = {United States},
year = {1993},
month = {9}
}