Microstructure and hydrogen-induced stress corrosion cracking behaviour of U75V flash-welded joints in high-speed railways
Source abstract
Abstract
The hydrogen-induced stress corrosion cracking (SCC) behaviour and mechanism of U75V welded joints (WJs) immersed in 3.5 wt% NaCl/hydrogenated solutions were investigated using slow strain rate tensile testing and electrochemical measurements. The WJs exhibited more negative potentials, higher corrosion current densities, slightly higher strength , and higher susceptibility to SCC in a hydrogenated solution than the base metal (BM). The strength and elongation of the WJs and BM significantly decreased after exposure to NaCl/hydrogenated solutions. These findings demonstrated that although U75V is extensively utilized in railway tracks, it is imperative to exercise corrosion protection measures for joints or employ specific corrosion-resistant rails in extreme applications to reduce service risks.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition · Material Properties and Failure Mechanisms
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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