Volumetric energy density impact on mechanical properties of additively manufactured 718 Ni alloy

Stegman, Benjamin; Shang, Anyu; Hoppenrath, Luke; Raj, Anant; Abdel-Khalik, Hany; Sutherland, John; Schick, David; Morgan, Victor; Jackson, Kirti; Zhang, Xinghang

doi:10.1016/j.msea.2022.143699

Title: Volumetric energy density impact on mechanical properties of additively manufactured 718 Ni alloy

Journal Article · 08 August 2022 · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing

DOI: https://doi.org/10.1016/j.msea.2022.143699 · OSTI ID:1977471

^[1]; Shang, Anyu ^[2]; Hoppenrath, Luke ^[2];

^[2];

^[2]; Schick, David ^[3]; Morgan, Victor ^[3]; Jackson, Kirti ^[3]; Zhang, Xinghang ^[2]

Purdue Univ., West Lafayette, IN (United States); OSTI
Purdue Univ., West Lafayette, IN (United States)
Proto Precision Additive LLC, Hilliard, OH (United States)

The 718 Ni-based superalloy has gained enormous attention in the additive manufacturing community for its great weldability, allowing for complex geometries to be formed, and its superb mechanical strength. Here we explore the influence of a wide range of major build parameters on microstructures and mechanical properties of 718 Ni alloys. Volumetric energy density appears to be one of the major parameters that captures the relationship between energy input and measured mechanical properties and microstructures of the alloys. A threshold energy density was identified below which the properties of the additively manufactured specimen degrade substantially. Finally, the influence of energy density on the quality of the built specimen simulated using Flow3D AM correlates well with the experimental results.

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Research Organization:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)

Grant/Contract Number:: NE0008990

OSTI ID:: 1977471

Journal Information:: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Journal Name: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing Journal Issue: C Vol. 854; ISSN 0921-5093

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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Title: Volumetric energy density impact on mechanical properties of additively manufactured 718 Ni alloy

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