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Elaboration of Oxide Dispersion Strengthened Fe-14Cr Steel by Selective Laser Melting

Abstract : This study investigates the feasibility to produce complex ODS Fe-14Cr steel parts by an additive manufacturing process such as selective laser melting (SLM). Milled powder, which is composed of non-spherical shape particules, is used as raw material. The main aim of this work is to assess the effect of each single processing parameter on the properties of SLM builds. Optimization of the process parameters allows to get ODS steel parts, which present high density up to 98percent and a fine dispersion of nanosized Y-Ti rich oxide particles. It is shown that an increase in laser power coupled with a decrease of hatch distance as well as the scan speed induce a coarsening of the microstructure. A precise control of the processing parameters allows to tune the microstructure in accordance to the target use of the built ODS steel parts. Since their microstructure is different from the one observed in ODS steel elaborated by conventional routes, new high temperature applications for ODS steels could be explored such as complex heat exchangers built in a single-step.
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https://hal-cea.archives-ouvertes.fr/cea-02339425
Contributor : Bibliothèque Cadarache <>
Submitted on : Wednesday, October 30, 2019 - 2:07:38 PM
Last modification on : Tuesday, April 28, 2020 - 11:28:13 AM

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E. Vasquez, Pf. Giroux, F. Lomello, H. Maskrot, P. Castany, et al.. Elaboration of Oxide Dispersion Strengthened Fe-14Cr Steel by Selective Laser Melting. Journal of Materials Processing Technology, Elsevier, 2019, 267, ⟨10.1016/j.jmatprotec.2018.12.034⟩. ⟨cea-02339425⟩

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