期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 70, 页码 34983-34997出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.08.060
关键词
Vanadium content; Hydrogen embrittlement; Hydrogen traps; Bolt steels
资金
- National Natural Science Foundation of China [52071016, U1760203]
Increasing vanadium content improves the resistance to hydrogen embrittlement in bolt steels, with vanadium precipitates acting as reversible hydrogen traps that inhibit hydrogen-dislocation interactions. Lower dislocation density and finer martensitic structure also contribute to hindering hydrogen-induced cracking.
In this work, the hydrogen embrittlement (HE) characteristics of 1400 MPa bolt steels with three different vanadium contents of 0, 0.17 wt% and 0.34 wt% were evaluated. The characteristics of the microstructure and dislocation density of the experimental steels were analyzed, and their effects on HE were also discussed. The results showed that with increasing V content, the HE resistance of the experimental steels was improved, and the experimental steel with the highest V content possessed the best HE resistance. The Vprecipitates of steels with V contents of 0.17 wt% and 0.34 wt% were reversible hydrogen traps, and the inhibitory effect of V-precipitates on hydrogen-dislocation interactions improved HE resistance. In addition, a lower dislocation density and finer martensitic structure were also beneficial for hindering hydrogen-induced cracking (HIC). (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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