Hydrogen embrittlement of an automotive 1700 MPa martensitic advanced high-strength steel

•The influence of hydrogen on MS1700 was investigated using the linearly increasing stress test (LIST).•MS1700 exhibited some hydrogen embrittlement (HE) at high hydrogen fugacities.•There was minimal hydrogen sensitivity in 3.5 wt% NaCl at the open circuit and zinc potentials.•The hydrogen influenc...

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Bibliographic Details
Published in:Corrosion science 2020-07, Vol.171, p.108726, Article 108726
Main Authors: Venezuela, Jeffrey, Lim, Fang Yan, Liu, Li, James, Sonia, Zhou, Qingjun, Knibbe, Ruth, Zhang, Mingxing, Li, Huixing, Dong, Futao, Dargusch, Matthew S., Atrens, Andrej
Format: Article
Language:English
Subjects:
A. Advanced high-strength steel
B. Martensite
Baking
C. Hydrogen embrittlement
Circuits
Heat treating
Heat treatment
High strength steel
High strength steels
Hydrogen
Hydrogen charging
Hydrogen embrittlement
Martensite
Martensitic stainless steels
Sensitivity
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Summary:•The influence of hydrogen on MS1700 was investigated using the linearly increasing stress test (LIST).•MS1700 exhibited some hydrogen embrittlement (HE) at high hydrogen fugacities.•There was minimal hydrogen sensitivity in 3.5 wt% NaCl at the open circuit and zinc potentials.•The hydrogen influence was manifested in the reduction of ductility and the occurrence of shear fracture.•The thermal treatment associated with paint baking enhanced HE susceptibility. The influence of hydrogen on a 1700 MPa martensitic advanced high-strength steel was investigated and compared with similar steels. MS1700 exhibited some hydrogen embrittlement for cathodic hydrogen charging in 0.1 M NaOH and 0.1 M HCl, but minimal hydrogen sensitivity for hydrogen charging in 3.5 wt% NaCl at the open circuit and zinc potentials. The hydrogen influence was manifested as a reduction of ductility and the occurrence of shear fracture. The heat treatment associated with paint baking increased the hydrogen embrittlement susceptibility. The higher hydrogen sensitivity of MS1700 was attributed to enhanced hydrogen trapping due to the higher carbon and martensite content.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2020.108726