A study of junctions of grain boundaries by TEM

It has been suggested that in a polycrystalline material a part of the lines where three (or more) grain boundaries meet present the character of desclinations, i.e. of oriented lines with a tensor of rank two attributed to them. The physical reality of these disclinations, which are called "tr...

Full description

Saved in:
Bibliographic Details
Published in:Scripta metallurgica et materialia 1990-04, Vol.24 (4), p.709-712
Main Authors: Bollmann, W., Guo, H.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It has been suggested that in a polycrystalline material a part of the lines where three (or more) grain boundaries meet present the character of desclinations, i.e. of oriented lines with a tensor of rank two attributed to them. The physical reality of these disclinations, which are called "triple line disclinations" or "T-disclinations", has been shown by their sensitivity to specific etching at the triple node. Observations of the differences between T-disclinations and ordinary triple lines in direct observation by means of transmission electron microscopy (TEM) turned out negative. No features could be found which are characteristic of T-inclinations exclusively. Deformation-free Cu--8.5Al alloy specimens were cut and electrolytically thinned. Micrographs were taken from the triple line area and diffractographs from the joining grains. Photomicrographs. 5 ref.--A.R.
ISSN:0956-716X
DOI:10.1016/0956-716X(90)90228-9