Impurity Removal and Microstructural Analysis of Inconel 718 Refined by Hydrogen Plasma Arc Melting

Research output: Contribution to journalJournal articlepeer-review

Abstract

Abstract: The high-temperature melting and the removal of gaseous and metallic impurities from Inconel 718 by hydrogen plasma arc melting (HPAM) were investigated. Solid-type Inconel 718 scraps were used as raw material. The concentrations of oxygen, nitrogen, and metallic impurities in the scraps were simultaneously decreased by HPAM. The refined ingot satisfied the recommended criteria for commercial Inconel 718. Following the melting of Inconel 718 by HPAM, the microstructure of the as-cast depended on different parts of the ingots, due to the different cooling rate of each part. Graphic Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)2360-2368
Number of pages9
JournalMetals and Materials International
Volume27
Issue number7
DOIs
StatePublished - 2021.07

Keywords

  • Cooling rate
  • HPAM
  • Impurities
  • Inconel 718
  • Laves

Quacquarelli Symonds(QS) Subject Topics

  • Materials Science
  • Engineering - Mechanical
  • Physics & Astronomy

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