Publication: Fatigue damage evolution in ultrafine-grained interstitial-free steel
Program
KU-Authors
KU Authors
Co-Authors
Niendorf, Thomas
Maier, Hans Juergen
Advisor
Publication Date
2011
Language
English
Type
Journal Article
Journal Title
Journal ISSN
Volume Title
Abstract
The current work presents the crack propagation behavior in ultrafine-grained (UFG) interstitial-free (IF) steel, and in particular, focuses on the damage evolution in UFG IF steel under cyclic loading. The current results indicate that equal-channel angular pressing (ECAP) has a major influence on the cyclic deformation response of the UFG IF steel, such that the failure and the crack path depend on the inclination plane during ECAP. Furthermore, the UFG IF steel demonstrates significant notch sensitivity in comparison to its coarse-grained counterpart. This is attributed to the ultrafine grains with a large volume fraction of high-angle grain boundaries, where glide of dislocations is hindered and the resulting internal stresses increase the stress concentration further in the presence of a pre-existing notch.
Description
Source:
Advanced Engineering Materials
Publisher:
Wiley
Keywords:
Subject
Materials science, multidisciplinary