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Crack Path and Liquid Metal Embrittlement Specificity of Austenitic Steels in Mercury at Room Temperature

8 Pages Posted: 30 Oct 2021 Publication Status: Published

See all articles by Thierry Auger

Thierry Auger

heSam University - PIMM/Arts et Métiers Institute of Technology

Bassem Barkia

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux

Eva Héripré

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux

Vincent Michel

heSam University - PIMM/Arts et Métiers Institute of Technology

Denis Mutel

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux

Ivan Guillot

Institut de Chimie et des Matériaux Paris Est- CNRS-UPEC

Zehoua Hamouche

heSam University - PIMM/Arts et Métiers Institute of Technology

Liliana Medina-Almazan

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux

Abstract

A liquid metal embrittlement specificity of three austenitic steels with increasing nickel content (304L, 316L and 316L(N)) is studied in liquid mercury. Only the low nickel alloys are susceptible to LME. The crack path of an austenitic steel fracture induced by liquid mercury has been elucidated. Deformation induced martensite (γ → α’) of the low nickel steels induces numerous α’/α’ interfaces at small scale that are susceptible to be embrittled. Because the only steel that resists LME is the one that shows stability over a’ phase change due mostly to its higher nickel content, a point confirmed by X Ray fractography, it is inferred that the major factor contributing to the LME sensitivity at room temperature is the α’ phase formation in unstable austenitic steels during plastic strain. This provides a sound rationale on how to prevent mercury induced embrittlement with austenitic steels.

Keywords: electron backscattering diffraction (EBSD)X-ray diffraction (XRD)austenitic steelsmartensitic phase transformationenvironmental brittleness

Suggested Citation

Auger, Thierry and Barkia, Bassem and Héripré, Eva and Michel, Vincent and Mutel, Denis and Guillot, Ivan and Hamouche, Zehoua and Medina-Almazan, Liliana, Crack Path and Liquid Metal Embrittlement Specificity of Austenitic Steels in Mercury at Room Temperature. Available at SSRN: https://ssrn.com/abstract=3953177 or http://dx.doi.org/10.2139/ssrn.3953177

Thierry Auger (Contact Author)

heSam University - PIMM/Arts et Métiers Institute of Technology ( email )

Paris
France

Bassem Barkia

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux ( email )

Gif-sur-Yvette
France

Eva Héripré

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux ( email )

Gif-sur-Yvette
France

Vincent Michel

heSam University - PIMM/Arts et Métiers Institute of Technology ( email )

Paris
France

Denis Mutel

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux ( email )

Gif-sur-Yvette
France

Ivan Guillot

Institut de Chimie et des Matériaux Paris Est- CNRS-UPEC ( email )

Thiais
France

Zehoua Hamouche

heSam University - PIMM/Arts et Métiers Institute of Technology ( email )

Paris
France

Liliana Medina-Almazan

University of Paris-Saclay - Laboratoire de Mécanique des Sols, Structures et Matériaux ( email )

Gif-sur-Yvette
France

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