Hydrogen embrittlement behaviors of additive manufactured maraging steel investigated by in situ high-energy X-ray diffraction

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Shilei Li
  • Mingming Liu
  • Yang Ren
  • Yandong Wang

Detail(s)

Original languageEnglish
Article number138341
Journal / PublicationMaterials Science and Engineering A
Volume766
Online published28 Aug 2019
Publication statusPublished - 24 Oct 2019
Externally publishedYes

Abstract

The microstructures and mechanical properties of additively manufactured (AM) maraging steel were investigated before and after hydrogen charging. The hydrogen-charged specimen suffers severe hydrogen embrittlement and its strength and plasticity decline obviously. The mechanism of ductile-to-brittle transition of AM maraging steel after hydrogen charging was studied by in situ high energy X-ray diffraction and electron backscatter diffraction techniques. Martensitic transformation occurs in the hydrogen-charged specimen under low stress. The premature phase transformation along with hydrogen-induced microcracks resulting in the brittle fracture of the hydrogen-charged specimen.

Research Area(s)

  • Additive manufacturing, High-energy X-ray diffraction, Hydrogen embrittlement, Martensitic transformation

Citation Format(s)