Precipitation behavior of a Co-free Fe-Ni-Cr-Mo-Ti-Al maraging steel after severe plastic deformation

Stefan Zeisl, A. Lassnig, Anton Hohenwarter, Francisca Mendez Martin

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


Maraging steels are martensitic steels that are strengthened by the precipitation of nano-sized intermetallic phases. Severe plastic deformation is known to influence diffusion, stability and properties of metallic materials. The goal of this study is to reveal the influence of severe plastic deformation on the hardness and the precipitation behavior of a Co-free maraging steel. For this study the as-quenched material was deformed with high-pressure torsion. Afterwards, a series of heat treatments were conducted. The hardness increase was measured and correlated with micro-to-nanoscale microstructural characteristics, focused on the precipitate characterization with atom probe tomography. Severe plastic deformation transformed the microstructure to a globular microstructure, delayed and minimized austenite reversion as well as accelerated and influenced the precipitation reaction, affecting the size, morphology and type of intermetallic phases.

FachzeitschriftMaterials science and engineering: A, Structural materials: properties, microstructure and processing
Ausgabenummer26 January
Frühes Online-Datum11 Dez. 2021
PublikationsstatusVeröffentlicht - 26 Jan. 2022

Bibliographische Notiz

Funding Information:
The authors want to thank the European Research Fund for Coal and Steel ( RFCS 847165 ) for providing the funding that made this study possible and the Austrian Science Fund (FWF) for providing the funding for A.L. within the Hertha Firnberg Program ( T891-N36 ). Further thanks goes to the “iNiTiAl” consortium for providing the material.

Funding Information:
2. The Austrian Science Fund (FWF) Hertha Firnberg Program (T891-N36): funding for A. Lassnig.

Funding Information:
1. The European Research Fund for Coal and Steel (RFCS 847165): funding for S. Zeisl and for the material.

Publisher Copyright:
© 2021 The Authors

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