Microstructure and fracture toughness of additively manufactured steels via directed energy deposition for pressure vessel application

Brumm, Jannik; Odermatt, Anton; Passing, Maximilian; Ventzke, Volker; Jepsen, Julian; Klassen, Thomas; Kashaev, Nikolai

doi:10.1016/j.ijpvp.2026.105905

Microstructure and fracture toughness of additively manufactured steels via directed energy deposition for pressure vessel application

Publication date

2026-06-10

Document type

Forschungsartikel

Author

Brumm, Jannik

Odermatt, Anton

Passing, Maximilian

Ventzke, Volker

Jepsen, Julian

Klassen, Thomas

Kashaev, Nikolai

Organisational unit

Angewandte Werkstofftechnik

Werkstoffkunde

DOI

10.1016/j.ijpvp.2026.105905

URI

https://openhsu.ub.hsu-hh.de/handle/10.24405/24099

Scopus ID

2-s2.0-105041902989

Publisher

Elsevier

Series or journal

International Journal of Pressure Vessels and Piping

ISSN

0308-0161

Periodical volume

223

Article ID

105905

Peer-reviewed

✅

Part of the university bibliography

✅

Language

English

Keyword

Additive manufacturing

Duplex stainless steel

Fracture toughness

L-DED-Wire

Structural steel

Tensile properties

Abstract

The application of additively manufactured steels in pressure vessel components presents a promising opportunity for design flexibility, weight reduction, and material efficiency. This study investigates the mechanical performance and microstructural characteristics of various steel grades fabricated via laser directed energy deposition with wire, with a focus on their suitability for pressure vessel application. The mechanical behavior is evaluated through tensile testing and fracture toughness measurements. The results reveal distinct microstructural features as a direct consequence of the manufacturing technique, including a pronounced mesostructure and strong anisotropy. Mechanical testing demonstrated that the anisotropy in the microstructure also leads to anisotropy in the tensile properties of duplex stainless steels and austenitic stainless steels. Compared to wrought steels, the tensile properties are comparable or superior. Mode I fracture toughness measurements reveal excellent damage tolerance of all steels, not influenced by the microstructural anisotropy. These findings confirm that the processed steels possess the necessary structural integrity and mechanical robustness for use in pressure vessel applications, highlighting the viability of this manufacturing route.

Description

This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).

Version

Published version

Access right on openHSU

Open access