Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7894135 | Corrosion Science | 2018 | 11 Pages |
Abstract
The effect of hydrogen on the tensile properties of AISI 304 K-TIG weld metal is investigated in this study. Fractographic analysis demonstrates a transition from quasi-cleavage/cleavage fracture to intergranular fracture in the brittle zone as the hydrogen-charging current density increases, which is attributed to the interplay of crystalline defect, hydrogen atoms, and αⲠmartensite transformation sites. It is believed that at low current density, αⲠmartensite nucleates and grows homogeneously in the interior of the grain. At high current density, the stress-induced αⲠmartensite forms preferentially at the grain boundary, which undergoes severe strain localisation and hydrogen atom segregation.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Xiaogang Li, Baoming Gong, Caiyan Deng, Yizhe Li,