Journal
ELECTROCHIMICA ACTA
Volume 424, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2022.140619
Keywords
Advanced high-strength steel; Electrochemical permeation; Hydrogen embrittlement; Plastic deformation; Hydrogen trapping
Categories
Funding
- Baosteel-Australia Joint Research & Development Centre (BAJC) [BA16010]
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The diffusion behavior of hydrogen in a 1180 MPa ferrite/martensite dual-phase steel was studied. It was found that cold deformation increased the hydrogen concentration, leading to increased hydrogen embrittlement sensitivity.
The diffusion behaviour of hydrogen in a 1180 MPa ferrite/martensite dual-phase (DP) advanced high-strength steel was investigated using electrochemical permeation tests in the following conditions: as manufactured, cold deformed and annealed. The effective hydrogen diffusion coefficient (0.46 x 10(-6) cm(2) s(-1)) for the cold-deformed DP1180 was considerably lower than for the steel as-received (0.74 x 10(-6) cm(2) s(- 1)) and annealed (2.2 x 10(-6) cm(2) s(-1)). The increased diffusible hydrogen concentration by cold deformation was attributed to increased reversibly trapped hydrogen. This work provides an experimental underpinning for the increased hydrogen embrittlement sensitivity caused by plastic deformation of the steel.
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