Microstructural and mechanical insights into 1.2709 maraging steel produced by direct energy deposition

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00639372" target="_blank" >RIV/68378271:_____/25:00639372 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22310/25:43933281

Result on the web

<a href="https://hdl.handle.net/11104/0369824" target="_blank" >https://hdl.handle.net/11104/0369824</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10853-025-11439-8" target="_blank" >10.1007/s10853-025-11439-8</a>

Result language

angličtina

Original language name

Microstructural and mechanical insights into 1.2709 maraging steel produced by direct energy deposition

Original language description

The present work focuses on the characterization of the ultra-high-strength 1.2709 maraging steel produced by the Direct Energy Deposition (DED) technique, either in its as-built or as-built + heat-treated state. Scanning electron microscope micrographs and X-ray diffraction patterns showed that the heat treatment (namely, solution annealing and aging) had minimal impact on the microstructure changes of the maraging steel. The material is characterized by fine cellular or dendritic microstructure containing several percent of the ductile γ-austenite phase in both as-built and as-built + heat-treated states. A small amount of the Ni3Mo0.5Ti0.5 intermetallic phase was observed even in the as-built state of the material. The heat treatment caused a substantial improvement of the mechanical properties through the homogeneous precipitation of nano-sized needle-shaped Ni3Mo0.5Ti0.5 intermetallic phase. Tensile yield strength increased from 753 to 1957 MPa, ultimate tensile strength—from 991 to 2024 MPa, and microhardness—from 350 to 700 HV0.1. The present results are also compared with those obtained for the same material produced by the more commonly used Laser Powder Bed Fusion (L-PBF) technique. Despite having a coarser microstructure with a presence of γ-phase than the LPBF-printed material, the DED-printed maraging steel exhibited greater precipitation hardening while maintaining 5% ductility after heat treatment.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Science

ISSN

0022-2461

e-ISSN

1573-4803

Volume of the periodical

60

Issue of the periodical within the volume

Oct

Country of publishing house

GB - UNITED KINGDOM

Number of pages

20

Pages from-to

17933-17952

UT code for WoS article

001564875500001

EID of the result in the Scopus database

2-s2.0-105015490382