The effect of microstructural imperfections on corrosion fatigue of additively manufactured ER70S-6 alloy produced by wire arc deposition

Tomer Ron, Galit Katarivas Levy, Ohad Dolev, Avi Leon, Amnon Shirizly, Eli Aghion

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

This study aims at evaluating the effect of microstructure imperfections on the corrosion fatigue performance of an ER70S-6 alloy produced by wire arc additive manufacturing (WAAM) process, in a 3.5% NaCl solution. For reference, a regular ST-37 alloy with relatively similar chemical composition was considered as a counterpart alloy. This was justified by the fact that the ER70S-6 alloy is usually used for conventional welding of ST-37 steel. The results obtained indicated that while the ST-37 alloy exhibited fatigue strength of 240 MPa in the corrosive solution, the additively manufactured ER70S-6 alloy showed fatigue strength of only 140 MPa. These differences were related to microstructural imperfections that are inherently produced during the WAAM process.

Original languageEnglish
Article number98
JournalMetals
Volume10
Issue number1
DOIs
StatePublished - 1 Jan 2020

Keywords

  • Additive manufacturing
  • Corrosion
  • Direct energy deposition
  • ER70S-6
  • Fatigue
  • Steel
  • Wire arc deposition

ASJC Scopus subject areas

  • Materials Science (all)

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