The relationship between heat treatment and microstructural factor on hydrogen embrittlement of ductile cast iron

Abstract

Ductile cast iron (DCI) is characterized by an extensive strength property, which is obtained by controlling microstructural factors such as graphite conditions, matrix structure and so on. Therefore, it is likely that these microstructural factors are closely related to hydrogen storage capability and embrittlement as well.

In this study, we performed various heat treatments on the three kinds of DCIs with ferritic-pearlitic matrix structure. The effects of heat treatment and microstructural factors on hydrogen storage capability and hydrogen embrittlement in tensile fracture were investigated using hydrogen charged as-cast and heat-treated materials.