The influence of laser power on the interfaces of functionally graded materials fabricated by powder- based directed energy deposition

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F22%3AN0000023" target="_blank" >RIV/26316919:_____/22:N0000023 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s10853-022-07453-9" target="_blank" >https://link.springer.com/article/10.1007/s10853-022-07453-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10853-022-07453-9" target="_blank" >10.1007/s10853-022-07453-9</a>

Result language

angličtina

Original language name

The influence of laser power on the interfaces of functionally graded materials fabricated by powder- based directed energy deposition

Original language description

Powder-based directed energy deposition (DED) technology with separate feeders for different individual materials enables the deposition of functionally graded materials (FGM) in combinations that would be very problematic using conventional technologies. These emerging innovative materials with the tailored properties of bimetallic material structures have potential applications in the energy, automotive and petrochemical industries. The combination of materials such as austenitic stainless steel 316L in combination with nickel superalloy Inconel 718 may satisfy requirements for corrosion and oxidation resistance, while maintaining suitable strength even at increased temperatures, at reasonable costs. However, the joining of dissimilar materials has certain limitations, and success depends on their mutual arrangement and the deposition parameters. The experimental program of the present study was aimed at optimizing the laser power of the powder-based DED process with respect to the quality of the interfaces of functionally graded materials in terms of microstructure evolution, interface quality and mechanical properties. One of the main objectives of the research was the analysis of two types of interfaces and the reduction in crack generation and propagation on the interface transition from Inconel 718 to 316L depending on the applied laser power, which ranged from 350 to 500 W. The presence of solidification cracks (SC) together with ductility dip cracking (DDC) played the most significant role in terms of the quality of this type of interface and significantly affected the values of the mechanical properties. Miniaturized tensile testing (MTT) in ZYX orientation at the individual interfaces' types throughout the deposit did not prove any dependence of the tensile characteristics on the sample position (bottom, middle and upper part of the block), but were strongly associated with changes in the laser power. The results presented in this study prove that cracking at interfaces of functionally graded materials is minimized by optimizing the deposition process parameters, specifically the laser power. The research presents a promising application of nickel superalloy Inconel 718 on a 316L stainless steel substrate in a horizontal configuration.

Czech name

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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

JOURNAL OF MATERIALS SCIENCE

ISSN

0022-2461

e-ISSN

1573-4803

Volume of the periodical

57

Issue of the periodical within the volume

28

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

13695-13723

UT code for WoS article

000826851600011

EID of the result in the Scopus database

2-s2.0-85134509205