Study on hydrogen-induced delayed cracking of steering shaft
Source abstract
Abstract
A 17-4PH steering shaft in the ship was brittle fractured during service, and its chemical composition, microstructure, fracture morphology of the material, and force simulations were analyzed. The results show that the failure mode of the shaft is hydrogen-induced delayed cracking, and the crack source is located on the outer surface of the contact position between the steering shaft and the end of the transfer shaft. Both the stress simulation analysis and the residual stress test prove that there is a greater stress concentration near the source region, which can easily lead to the migration and aggregation of hydrogen (H) during service, thus causing hydrogen-induced delayed cracking. The microstructure of a failure specimen with tempered and higher tensile strength will lead to higher sensitivity to hydrogen.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Mechanical Failure Analysis and Simulation · Non-Destructive Testing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Wuhan Second Ship Design and Research Institute 1 , Wuhan 430205, China
Luoyang Ship Material Research Institute 2 , Luoyang 471023, China
Henan Key Laboratory of Technology and Application Structural Materials for Ships and Marine Equipments 3 , Luoyang 471023, China
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