Studies on the fractal dimension and fracture toughness of steel

The slit island method is employed to measure fractal dimensions D sub F of fractured surfaces under plane strain conditions with the help of an image analysis technique for two high-strength steels under differential heat treatment conditions and at different test temperatures. It is shown that the...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 1988-05, Vol.21 (5), p.848-850
Main Authors: Mu, Z Q, Lung, C W
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:The slit island method is employed to measure fractal dimensions D sub F of fractured surfaces under plane strain conditions with the help of an image analysis technique for two high-strength steels under differential heat treatment conditions and at different test temperatures. It is shown that the fractured surfaces are of fractal character. The values of D sub F decrease smoothly with an increase of the logarithm of fracture toughness K sub IC . This relationship may reflect the changes in the microstructure that occurred during different heat treatments and the changes in the fracture mechanism that occurred at different test temperatures. The fractal dimension D sub F can be regarded as a measure of fracture toughness in steel. Finally, the experimental results are explained in terms of the relation of critical crack extension force to the true total area of the irregular fracture surfaces. 5 ref.--AA
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/21/5/031