Effect of hydrogen on plastic strain localization and fracture of steels

International Conference on Advanced Materials and New Technologies in Modern Materials Science 2015

Nadjozhkin, M.V.^1 ; Lunev, A.G.^1 ; Li, Yu V.^1 ; Barannikova, S.A.^1,2,3

Institute of Strength Physics and Materials Science, SB RAS, Tomsk

634055, Russia^1

Tomsk State University, Tomsk

634050, Russia^2

Tomsk State University of Architecture and Building, Tomsk

634003, Russia^3

关键词: Deformed samples;    Double exposure;    Effect of hydrogen;    Interstitial hydrogen;    Plastic strain localization;    Speckle photography technique;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/116/1/012024/pdf
DOI  :  10.1088/1757-899X/116/1/012024

来源: IOP

【 摘 要 】

The effect of interstitial hydrogen atoms on the mechanical properties and plastic strain localization patterns in tensile tested specimens of low-carbon steels have been studied using a double exposure speckle photography technique. It is found that the mechanical properties of low-carbon steels are affected adversely by hydrogen embrittlement. The deformation diagrams were examined for the deformed samples of low-carbon steels. These are found to show all the plastic flow stages: the linear, parabolic and pre-failure stages would occur for the respective values of the exponent n from the Ludwik-Holomon equation.