WIT Press


Stress Concentrations At Grain Boundaries Due To Anisotropic Elastic Material Behavior

Price

Free (open access)

Paper DOI

10.2495/DM000371

Volume

26

Pages

10

Published

2000

Size

1,235 kb

Author(s)

A. Schick, C.-P. Fritzen, W. Floer, Y.M. Hu U. Krupp & H.-J. Christ

Abstract

Scanning electron microscopy (SEM) examinations on samples of the (3-titanium alloy LCB (low cost beta by TIMET) after fatigue tests revealed a strong influence of the crystallographic misorientation of adjacent grains on crack initiation and short crack growth. From that point of view the knowledge of the anisotropic elastic properties of individual grains and their influence on the stress distribution within the microstructure is of great importance to understand crack initiation and propagation mechanisms. For this purpose the microstructure of polycrystals at sites where cracks initiated was simulated by means of three dimensional finite element (FE) calculations, considering the elastic

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