High strength and retained ductility achieved in a nitrided strip cast Nb-microalloyed steel

Journal article
(Original article)


Publication Details

Author(s): Xie KY, Shrestha SL, Felfer P, Cairney JM, Killmore CR, Carpenter KR, Kaul HR, Ringer SP
Journal: Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
Publisher: ASM International
Publication year: 2013
Volume: 44
Journal issue: 2
Pages range: 848-855
ISSN: 1073-5623


Abstract


The current study investigates the strengthening of an Nb-microallyed CASTRIP steel at 798 K (525 C) by nitriding in a KNO salt bath. Nitriding up to 1 hour dramatically increased the yield strength of the steel by ∼35 pct (from 475 to 645 MPa) with no sacrifice of ductility (∼16 pct). Further nitriding led to brittle fracture. Hardness profiles of the nitrided steels through the thickness reveal hard surfaces and a relatively softer core. The hardening of the shell in the nitrided steels is thought to be the combined effect of solid solution strengthening from nitrogen and dispersion strengthening from clusters and precipitates. The retained ductility is attributed to the hard-shell-soft-core structure through nitriding. © 2012 The Minerals, Metals & Materials Society and ASM International.



FAU Authors / FAU Editors

Felfer, Peter Prof. Dr.
Juniorprofessor für Werkstoffwissenschaften (3D-Nanoanalytik und Atomsondenmikroskopie)


External institutions with authors

BlueScope Steel
University of Sydney


How to cite

APA:
Xie, K.Y., Shrestha, S.L., Felfer, P., Cairney, J.M., Killmore, C.R., Carpenter, K.R.,... Ringer, S.P. (2013). High strength and retained ductility achieved in a nitrided strip cast Nb-microalloyed steel. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 44(2), 848-855. https://dx.doi.org/10.1007/s11661-012-1446-4

MLA:
Xie, Kelvin Y., et al. "High strength and retained ductility achieved in a nitrided strip cast Nb-microalloyed steel." Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 44.2 (2013): 848-855.

BibTeX: 

Last updated on 2018-06-12 at 13:50