Microstructural Evolution in Additively Manufactured Fe-Cr-Ni Maraging Stainless Steel

Journal article (2022)

Authors

Ayda Shahriari University of New Brunswick
M. Sanjari Natural Resources Canada, University of New Brunswick
H. Pirgazi Universiteit Gent
Fateh Fazeli Natural Resources Canada
B. S. Amirkhiz University of New Brunswick, Natural Resources Canada
L.A.I. Kestens Team Kevin Rossi - Mechanical, Maritime and Materials Engineering , Universiteit Gent
Mohsen Mohammadi University of New Brunswick
Research Group
Team Kevin Rossi (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 Ayda Shahriari, Mehdi Sanjari, H. Pirgazi, Fateh Fazeli, Babak Shalchi Amirkhiz, L.A.I. Kestens, Mohsen Mohammadi
DOI
help_outline
https://doi.org/10.1007/s11661-022-06633-1
More Info
expand_more

Published Date

2022

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Kevin Rossi

Abstract

In this work, the effect of heating rate on the phase transformation temperatures was investigated using dilatometry analysis. Continuous heating and isothermal holding above Ac3 temperature on microstructural evolutions in additively manufactured (AM) parts of Fe-Cr-Ni maraging stainless steel were studied. The microstructural features developed within the heating processes were characterized employing electron backscatter diffraction and transmission electron microscopy. Austenite reversion was found to take place in two steps for the AM parts by a diffusive mechanism as well as the precipitation reactions. Although grain refinement occurred during the austenite reversion of the continuously heated samples, the microstructure showed a coarser grain size after isothermal heating. The crystallographic orientations developed after the heating processes were different from those of the initial ones implying the absence of the austenite memory effect.