The effect of low hydrogen content on hydrogen embrittlement of additively manufactured 17–4 stainless steel

Guy Ben-Hamu, Polina Metalnikov, Dan Eliezer

Research output: Contribution to journalArticlepeer-review

Abstract

This work aims to evaluate the impact of small amounts of hydrogen on the hydrogen-assisted cracking (HAC) of 17-4 martensitic stainless steel (SS) prepared by additive manufacturing (AM). To elucidate the effect of processing on the hydrogen–material interactions, the obtained results were compared with a conventionally manufactured (CM) counterpart. It was found that the hydrogen uptake of AM 17-4 SS is higher compared to CM; however, its resistance to HAC is improved. These differences are attributed to the presence of stronger hydrogen trapping sites, retained austenite and the absence of Nb-rich precipitates in the AM 17-4 SS. The effect of processing on the microstructure and the susceptibility to hydrogen-induced damage and hydrogen embrittlement is discussed in detail.

Original languageEnglish
JournalProgress in Additive Manufacturing
DOIs
StateAccepted/In press - 1 Jan 2024

Keywords

  • 17-4 PH stainless steel
  • Additive manufacturing
  • Hydrogen embrittlement
  • Hydrogen trapping
  • Thermal desorption spectroscopy

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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