Effect of deposit thickness on microstructure and mechanical properties at ambient and elevated temperatures for Inconel 718 superalloy fabricated by directed energy deposition
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F22%3AN0000006" target="_blank" >RIV/26316919:_____/22:N0000006 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0925838822011148" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0925838822011148</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jallcom.2022.164723" target="_blank" >10.1016/j.jallcom.2022.164723</a>
Alternative languages
Result language
angličtina
Original language name
Effect of deposit thickness on microstructure and mechanical properties at ambient and elevated temperatures for Inconel 718 superalloy fabricated by directed energy deposition
Original language description
The effect of deposit thickness on the microstructure and the mechanical properties of Inconel 718 (IN718) fabricated by directed energy deposition was systematically investigated in both as-deposited (AD) and homogenization + solution + aging (HSA) treated conditions. Results indicate that deposit thickness for thin parts has a more significant impact on the microstructure and subsequent room (RT) and elevated tem-perature (650 degrees C) tensile properties compared to thick parts. Applying HSA treatment can effectively homogenize the microstructure of thick builds with a microstructure transition from columnar-dendritic grain structure presented in the AD condition to recrystallized equiaxted grain structure, which results in almost similar yield strength, ultimate tensile strength and ductility of ~ 970 MPa, ~ 1237 MPa, ~ 20% at RT and ~ 816 MPa, ~ 954 MPa, ~ 12% at 650 degrees C, respectively. In contrast, thin parts maintaining columnar grain features during HSA treatment yield a higher yield strength of 1112 MPa (increased by 15%) at RT and 936 MPa (increased by 15%) at 650 degrees C, but much lower ductility of 9% (decreased by 54%) at RT and 6% MPa (decreased by 51%) at 650 degrees C. The remaining large amount of residual stress primarily contribute to the enhancement of yield strength, as well as large amount of delta phase responsible for the much worse ductility for thin parts after HSA treatment. In addition, the underlying thermal history evolution in various deposit thickness is elucidated by the thermal simulations with the use of Finite Element Method (FEM) method within 3DExperience software. The results present in the current study show the capability of the directed energy deposition process to manufacture homogeneous components with varying thickness for high temperature application after a proper heat treatment, with regard to their initial as-deposited materials.(c) 2022 Elsevier B.V. All rights reserved.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
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)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN
0925-8388
e-ISSN
1873-4669
Volume of the periodical
908
Issue of the periodical within the volume
2022-07-05
Country of publishing house
CH - SWITZERLAND
Number of pages
17
Pages from-to
nestránkováno
UT code for WoS article
000792884600002
EID of the result in the Scopus database
2-s2.0-85126964251