Arc-based directed energy deposited Inconel 718: role of heat treatments on high-temperature tensile behavior

Francisco Werley Cipriano Farias, Valdemar Rebelo Duarte, João da Cruz Payão Filho, Norbert Schell, Emad Maawad, Mélanie Bordas-Czaplicki, Fábio Machado Alves da Fonseca , Jonathan Cormier, Telmo Jorge Gomes dos Santos, João Pedro Oliveira

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4 Citations (Scopus)
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Abstract

This study evaluated the effect of dedicated heat treatments (1050°C, 1100°C, 1142°C, and 1185°C/2 h + double-aging) on the uniaxial tensile properties at elevated temperature (650°C) of Inconel® 718 fabricated via arc plasma directed energy deposition. They enabled to meet, for the first time, the AMS 5662 requirements at elevated temperature. Tensile tests exhibited ductile strain–stress curves. The 1100°C/2 h + double-aging showed the best performance (YS0.2%, UTS, and elongation of 967 MPa, 1126 MPa, and 18.7%, respectively). Additionally, vertical specimens evidenced dynamic strain aging, although no brittle-like features were observed.
Original languageEnglish
Pages (from-to)97-107
Number of pages11
JournalMaterials Research Letters
Volume12
Issue number2
DOIs
Publication statusPublished - 2024

Keywords

  • arc plasma directed energy deposition
  • crystallographic texture
  • heat treatment
  • Inconel 718
  • tensile behavior at elevated temperature

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