Kazum, Oluwole, Beladi, Hossein, Timokhina, Ilana B., He, Yinghe, and Kannan, M. Bobby (2016) Hydrogen permeation in nanostructured bainitic steel. Metallurgical and Materials Transactions A, 47A (10). pp. 4896-4903.

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Abstract

Hydrogen permeation of nanostructured bainitic steel, produced at two different transformation temperatures, i.e., 473.15 K (200 A degrees C) BS-200 and 623.15 K (350 A degrees C) BS-350, was determined using Devanathan-Stachurski hydrogen permeation cell and compared with that of mild steel. Nanostructured bainitic steel showed lower effective diffusivity of hydrogen as compared to the mild steel. The BS-200 steel, which exhibited higher volume fraction of bainitic ferrite phase, showed lower effective diffusivity than BS-350 steel. The finer microstructural constituents (bainitic ferrite laths and retained austenite films) and higher dislocation density in the bainitic ferrite phase of BS-200 steel can be attributed to its lower effective diffusivity as compared to BS-350 steel and mild steel.

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