Abstract: Hydrogen embrittlement is a phenomenon in which material becomes brittle in the presence of hydrogen and tend to fracture due to the reduction of plasticity and toughness. The problem of hydrogen embrittlement in steels, especially in high strength steels, becomes more and more apparent owing to their wide application in the industry and with the increasing requirement for mechanical properties. This study attempts to analyze the evolution process of hydrogen embrittlement research, the current research hotspots and future research trends from the perspective of literature analysis, based on the statistical analysis methods in bibliometrics and the visual text mining tool, CiteSpace. The research history of hydrogen embrittlement can be divided into embryonic stage, slow growth period, linear growth period and exponential growth period. The main research force changes constantly among the United Kingdom, Germany, the United States, and Japan. Moreover, China became the country with the fastest growth rate in the research of hydrogen embrittlement in 21st century. The researches mainly focus on the scientific issues related to hydrogen induced fracture, including the relationship between hydrogen embrittlement and the microstructure, hydrogen diffusion behavior, the failure behavior of material and the initiation and propagation behavior of cracks in the presence of both hydrogen and stress. The strategies to reduce hydrogen embrittlement susceptibility from the perspective of microstructure optimization, hydrogen production and storage technology, the properties of hydrogen production and storage materials and their hydrogen embrittlement susceptibility, will remain the focus of future research.
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2019, Vol. 33 
