Effect of post-treatment on local mechanical properties of additively manufactured impellers made of maraging steel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F22%3AN0000031" target="_blank" >RIV/26316919:_____/22:N0000031 - isvavai.cz</a>

Result on the web

<a href="https://www.emerald.com/insight/content/doi/10.1108/RPJ-03-2022-0089/full/html" target="_blank" >https://www.emerald.com/insight/content/doi/10.1108/RPJ-03-2022-0089/full/html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1108/RPJ-03-2022-0089" target="_blank" >10.1108/RPJ-03-2022-0089</a>

Result language

angličtina

Original language name

Effect of post-treatment on local mechanical properties of additively manufactured impellers made of maraging steel

Original language description

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 and age-hardening) exhibited the highest yield and ultimate tensile strength. Practical implications The microstructure and local mechanical properties were studied on L-PBF platform with deposited walls of various thicknesses. Subsequently, a detailed analysis was conducted on real components (impellers) made of maraging steel, commonly used in tooling, automotive and aerospace industries. Originality/value The broadly understood quality of manufactured parts is crucial for their reliable and long-lasting operation. The findings presented in the manuscript allow the readers better understanding of the connection between deposition parameters, post-processing, microstructure and mechanical performance of additive manufacturing-processed parts.

Czech name

—

Czech description

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Type

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

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/EF17_048%2F0007350" target="_blank" >EF17_048/0007350: Pre-Application Research of Functionally Graduated Materials by Additive Technologies</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

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

Name of the periodical

RAPID PROTOTYPING JOURNAL

ISSN

1355-2546

e-ISSN

1758-7670

Volume of the periodical

neuveden

Issue of the periodical within the volume

SEPTEMBER 2022

Country of publishing house

GB - UNITED KINGDOM

Number of pages

18

Pages from-to

nestránkováno

UT code for WoS article

000855845300001

EID of the result in the Scopus database

2-s2.0-85138938846