Cited by 8Additive Manufacturing Materials and ProcessesAdditive Manufacturing and 3D Printing TechnologiesMicrostructure and Mechanical Properties of Steels

Effect of Post-Treatment on Local Mechanical Properties of Additively Manufactured Impellers Made of Maraging Steel

Raghavan, Srinivasan, Dzugan, Jan, Rzepa, Sylwia, Podany, Pavel, Soh, Norman, Hao, Lim Jia, Khan, Niaz·2023·Rapid Prototyping Journal

Abstract

Purpose This study aims to investigate the effect of the wall thickness, deposition orientation and two different post-processing methods on the local mechanical properties and microstructure of additively manufactured parts made of maraging steel. In order to examine the local properties of the build, miniaturized testing specimens were employed. Before application of small-sized specimens, their performance was verified. Design/methodology/approach The investigation was composed of two stages. As first, the part thickness, specimen size and orientation were studied on a laser-powder bed fusion (L-PBF) platform with deposited walls of various thicknesses made of maraging steel. Subsequently, the influence of different heat-treatment methods was investigated on the final product, i.e. impellers. The miniaturized and standard tensile tests were performed to investigate the local mechanical properties. The porosity, microstructures and fracture surfaces were analysed by X-ray-computed tomography, X-ray diffraction and scanning electron microscopy with electron backscatter diffraction. Findings The results revealed good agreement between the values provided by miniaturized and standard specimens. The thinnest parts produced had the largest pores and the highest scatter of elongation values. In these cases, also the sub-contour porosity was observed. Part thickness affected pores’ size and results repeatability but not total porosity. The two-step heat-treatment (solutionizing an…

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Registry

Crossref · 10.1108/rpj-03-2022-0089

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  • Martensitic steel shows changes in pore size and difficulty in repeatability of results, but there is no variation in total porosity.

    “Martensitic steel shows changes in pore size and difficulty in repeatability of results, but there is no variation in total porosity.”
  • The applied heat treatment (solution and aging hardening) showed superior performance and improved tensile strength.

    “The applied heat treatment (solution and aging hardening) showed superior performance and improved tensile strength [77].”

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Authors
Raghavan, S., Dzugan, J., Rzepa, S., Podany, P., Soh, N., Hao, L. J., & Khan, N.
Affiliations
  • Advanced Remanufacturing & Technology Centre (SG)
  • Comtes Fht (Czechia) (CZ)
Venue
Rapid Prototyping Journal
Publisher
Emerald
Published
2022-09-22
Volume
29
Issue
3
Pages
594-611
ISSN
1355-2546 (ISSN-L)
OpenAlex
W4296703445
Cited by
8
References
47
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 1
FWCI
0.57
Type
journal article
Language
en
Open access
closed
Locations
Rapid Prototyping Journal (publishedVersion)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Additive Manufacturing Materials and Processes
  • Physical Sciences › Engineering › Automotive Engineering › Additive Manufacturing and 3D Printing Technologies
  • Physical Sciences › Engineering › Mechanical Engineering › Microstructure and Mechanical Properties of Steels
Keywords
maraging steel, laser powder bed fusion, impeller, post-treatment, heat treatment, solution treatment, precipitation hardening, wall thickness, porosity, microstructure, tensile properties, miniaturized specimens, fractography, additive manufacturing

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