Additive Manufacturing of Nickel-Base Superalloy René N5 through Scanning Laser Epitaxy (SLE) − Material Processing, Microstructures, and Microhardness Properties

Amrita Basak, Suman Das

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Nickel-base superalloy René N5 is deposited on cast René N5 substrates with [100] and [001] crystallographic orientations through scanning laser epitaxy (SLE) applied to gas-atomized pre-alloyed René N5 powder. Single-pass fabrication of crack-free deposits exceeding 1000 micron is achieved. High-resolution optical microscopy reveals that the deposits have 10 times finer primary dendritic arm spacing compared to the substrate. SEM reveals the presence of finer microstructure in the deposit region compared to the substrate region. XRD and EBSD investigations show that the substrate crystallographic orientation does not affect the unidirectional crystal growth in the deposit region. Vickers microhardness values are higher in the deposits compared to the substrate.

Original languageEnglish (US)
Article number1600690
JournalAdvanced Engineering Materials
Volume19
Issue number3
DOIs
StatePublished - Mar 1 2017

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3D printers
heat resistant alloys
Nickel
Superalloys
Epitaxial growth
Microhardness
microhardness
epitaxy
Deposits
manufacturing
deposits
nickel
Scanning
microstructure
Microstructure
scanning
Lasers
Substrates
Processing
lasers

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Additive Manufacturing of Nickel-Base Superalloy Ren{\'e} N5 through Scanning Laser Epitaxy (SLE) − Material Processing, Microstructures, and Microhardness Properties",
abstract = "Nickel-base superalloy Ren{\'e} N5 is deposited on cast Ren{\'e} N5 substrates with [100] and [001] crystallographic orientations through scanning laser epitaxy (SLE) applied to gas-atomized pre-alloyed Ren{\'e} N5 powder. Single-pass fabrication of crack-free deposits exceeding 1000 micron is achieved. High-resolution optical microscopy reveals that the deposits have 10 times finer primary dendritic arm spacing compared to the substrate. SEM reveals the presence of finer microstructure in the deposit region compared to the substrate region. XRD and EBSD investigations show that the substrate crystallographic orientation does not affect the unidirectional crystal growth in the deposit region. Vickers microhardness values are higher in the deposits compared to the substrate.",
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AB - Nickel-base superalloy René N5 is deposited on cast René N5 substrates with [100] and [001] crystallographic orientations through scanning laser epitaxy (SLE) applied to gas-atomized pre-alloyed René N5 powder. Single-pass fabrication of crack-free deposits exceeding 1000 micron is achieved. High-resolution optical microscopy reveals that the deposits have 10 times finer primary dendritic arm spacing compared to the substrate. SEM reveals the presence of finer microstructure in the deposit region compared to the substrate region. XRD and EBSD investigations show that the substrate crystallographic orientation does not affect the unidirectional crystal growth in the deposit region. Vickers microhardness values are higher in the deposits compared to the substrate.

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