Effects of electric current on δ phase evolution and tensile behavior of Inconel 718

Jiankang Huang, Qi Li, Fuqian Yang, Xiaoquan Yu, Yu Ni, Ding Fan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Inconel 718 is a nickel-based alloy widely used in aerospace industry for high temperature applications. The unique mechanical properties of Inconel 718 rely on the precipitation strengthening, which requires the control of the formation and growth of precipitates in the alloy through high-temperature treatment. In this work, we demonstrate the feasibility of altering the microstructure and forming precipitates in Inconel 718 rods by passing an electric current in a range of 85–130 A through the rods. EBSD (electron backscatter diffraction) is used to characterize the evolution of the microstructures of the Inconel 718 rods induced by the electric current. The experimental results reveal that passing electric current through Inconel 718 rods can hinder grain growth and increase the fraction and average size of δ phase. The tensile strength of the current-treated Inconel 718 rods increases first with the increase of electric current for the current intensity less than or equal to 105 A and then decreases with further increasing electric current to 130 A.

Original languageEnglish
Article number143886
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
StatePublished - Oct 10 2022

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Foundation of China (No. 52175324 ).

Publisher Copyright:
© 2022 Elsevier B.V.


  • Electric current
  • Inconel 718 superalloy
  • Tensile strength
  • δ phase

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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