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Title: On the CSL grain boundary distributions in polycrystals. [Coincidence site lattice]

Abstract

CSL (Coincidence Site Lattice) grain boundaries are considered to be special for polycrystals. Compared to non-special, random grain boundaries, they are believed to be low-energy, and they are observed to be resistant to intergranular fracture, creep cavitation, etc. Thus the frequencies of CSL distribution are important in Grain Boundary Characteristics Design (GBCD). In a previous paper, the influence of crystallographic texture on the frequencies of CSL grain boundary distributions in polycrystals was discussed. The authors draw the conclusion that the frequency of CSL-boundaries depends upon texture, but that this frequency is weak for textures which are not sharp. However, the potential for spatial correlations between neighboring grain orientations was not considered in this earlier work, and some recent experimental measurements in real polycrystals are in contradiction with this conclusion. Recent experimental advances make it possible to determine the crystallographic characteristics of a large number of grain boundaries in a short time. This paper illustrates two examples for fcc cubic materials: Inconel 600 alloy with a weak rolling texture, and a highly fiber-textured aluminum thin film. It is demonstrated that the occurrence of CSL boundaries is very strong in the weakly textured Inconel 600 alloy, in disagreement with theoretical estimates. Formore » the aluminum thin film, it is shown that experimental measurements and theoretical predictions are in reasonable agreement. In the next section the numerical results of theoretical and computer simulated CSL grain boundary distributions are described. Section 3 details the OIM experimental measurements. Section 4 provides a more complete discussion of the comparison between theoretical predictions and experimental measurements.« less

Authors:
 [1];  [2]
  1. Yale Univ., New Haven, CT (United States). Dept. of Mechanical Engineering
  2. Brigham Young Univ., Provo, UT (United States). Dept. of Manufacturing Engineering
Publication Date:
OSTI Identifier:
5188906
DOE Contract Number:  
FG02-88ER45355
Resource Type:
Journal Article
Journal Name:
Scripta Metallurgica et Materialia; (United States)
Additional Journal Information:
Journal Volume: 30:8; Journal ID: ISSN 0956-716X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; GRAIN BOUNDARIES; INCONEL 600; GRAIN ORIENTATION; TEXTURE; THEORETICAL DATA; ALLOY-NI76CR15FE8; ALLOYS; ALUMINIUM ADDITIONS; ALUMINIUM ALLOYS; CHROMIUM ALLOYS; CORROSION RESISTANT ALLOYS; DATA; ELEMENTS; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; INCONEL ALLOYS; INFORMATION; IRON ALLOYS; MATERIALS; METALS; MICROSTRUCTURE; NICKEL ALLOYS; NICKEL BASE ALLOYS; NIMONIC; NUMERICAL DATA; ORIENTATION; TITANIU; TITANIUM ADDITIONS; 360102* - Metals & Alloys- Structure & Phase Studies

Citation Formats

Pan, Yu, and Adams, B L. On the CSL grain boundary distributions in polycrystals. [Coincidence site lattice]. United States: N. p., 1994. Web. doi:10.1016/0956-716X(94)90554-1.
Pan, Yu, & Adams, B L. On the CSL grain boundary distributions in polycrystals. [Coincidence site lattice]. United States. https://doi.org/10.1016/0956-716X(94)90554-1
Pan, Yu, and Adams, B L. Fri . "On the CSL grain boundary distributions in polycrystals. [Coincidence site lattice]". United States. https://doi.org/10.1016/0956-716X(94)90554-1.
@article{osti_5188906,
title = {On the CSL grain boundary distributions in polycrystals. [Coincidence site lattice]},
author = {Pan, Yu and Adams, B L},
abstractNote = {CSL (Coincidence Site Lattice) grain boundaries are considered to be special for polycrystals. Compared to non-special, random grain boundaries, they are believed to be low-energy, and they are observed to be resistant to intergranular fracture, creep cavitation, etc. Thus the frequencies of CSL distribution are important in Grain Boundary Characteristics Design (GBCD). In a previous paper, the influence of crystallographic texture on the frequencies of CSL grain boundary distributions in polycrystals was discussed. The authors draw the conclusion that the frequency of CSL-boundaries depends upon texture, but that this frequency is weak for textures which are not sharp. However, the potential for spatial correlations between neighboring grain orientations was not considered in this earlier work, and some recent experimental measurements in real polycrystals are in contradiction with this conclusion. Recent experimental advances make it possible to determine the crystallographic characteristics of a large number of grain boundaries in a short time. This paper illustrates two examples for fcc cubic materials: Inconel 600 alloy with a weak rolling texture, and a highly fiber-textured aluminum thin film. It is demonstrated that the occurrence of CSL boundaries is very strong in the weakly textured Inconel 600 alloy, in disagreement with theoretical estimates. For the aluminum thin film, it is shown that experimental measurements and theoretical predictions are in reasonable agreement. In the next section the numerical results of theoretical and computer simulated CSL grain boundary distributions are described. Section 3 details the OIM experimental measurements. Section 4 provides a more complete discussion of the comparison between theoretical predictions and experimental measurements.},
doi = {10.1016/0956-716X(94)90554-1},
url = {https://www.osti.gov/biblio/5188906}, journal = {Scripta Metallurgica et Materialia; (United States)},
issn = {0956-716X},
number = ,
volume = 30:8,
place = {United States},
year = {1994},
month = {4}
}