Understanding the behavior of advanced high-strength steels using atom probe tomography

Authors

E V. Pereloma, University of WollongongFollow
Hossein Beladi, Deakin University
Laichang Zhang, University of Western AustraliaFollow
Ilana Timokhina, Deakin UniversityFollow

RIS ID

69577

Publication Details

Pereloma, E., Beladi, H., Zhang, L. & Timokhina, I. (2012). Understanding the behavior of advanced high-strength steels using atom probe tomography. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 43A (11), 3958-3971.

Abstract

The key evidence for understanding the mechanical behavior of advanced high strength steels was provided by atom probe tomography (APT). Chemical overstabilization of retained austenite (RA) leading to the limited transformation-induced plasticity (TRIP) effect was deemed to be the main factor responsible for the low ductility of nanostructured bainitic steel. Appearance of the yield point on the stress-strain curve of prestrained and bake-hardened transformation-induced plasticity steel is due to the unlocking from weak carbon atmospheres of newly formed during prestraining dislocations.