Journal
CORROSION SCIENCE
Volume 206, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110530
Keywords
Heat treatment; Microstructure; Mechanical properties; Hydrogen embrittlement
Funding
- National Key Research & Develop- ment Program of China [2021YFB3702200]
- National Natural Science Foundation of China [51971034, 51771026]
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The novel heat treatment significantly improves the hydrogen embrittlement resistance of PH13-8Mo steel by reducing the hydrogen embrittlement susceptibility index, while maintaining mechanical properties like tensile strength.
Application of the novel heat treatment significantly improves the PH13-8Mo steel hydrogen embrittlement (HE) resistance over that obtained by conventional heat treatment, while maintaining the mechanical properties. The mechanism of the proposed method is as follows: austenite captures hydrogen and the mechanical properties are improved by fine grain strengthening. The results of this study show that compared with the steel properties obtained by conventional peak-aged heat treatment, the novel heat treatment results in a reduction in the tensile strength from 1500 MPa to 1400 MPa, but a significant decrease in the HE susceptibility index (I-HE) from 52% to 14%.
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