Improvement of Resistance to Hydrogen Embrittlement for 1300MPa Ultra-high Strength Steel by Introducing Nano-sized Cu-rich Phase Precipitation

Cu-bearing and conventional martensite ultra-high strength steels with tensile strengths of 1300 MPa were investigated to explore the effect of the precipitation of Cu-rich particles on hydrogen embrittlement (HE). The results showed that the Cu-bearing steel strengthened by 9R Cu-rich precipitates...

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Bibliographic Details
Published inInternational journal of electrochemical science Vol. 17; no. 6; p. 220651
Main Authors Li, Chengning, Gao, Heshan, Jiang, Yuanbo, Fu, Wen, Yan, Qiangjun, Hu, Wenyi, Wang, Dongpo, Di, Xinjie
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2022
Subjects
Cu-rich precipitation
Hydrogen embrittlement
Thermal desorption spectrometry
Ultra-high strength steel
Ultra-high strength steel
Thermal desorption spectrometry
Cu-rich precipitation
Hydrogen embrittlement
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Summary:Cu-bearing and conventional martensite ultra-high strength steels with tensile strengths of 1300 MPa were investigated to explore the effect of the precipitation of Cu-rich particles on hydrogen embrittlement (HE). The results showed that the Cu-bearing steel strengthened by 9R Cu-rich precipitates had nanoscale and coherent properties and exhibited a higher resistance to HE than the conventional martensite steel. The Cu-rich precipitates served as irreversible hydrogen traps, leading to a low diffusible hydrogen content and hydrogen diffusivity for the Cu-bearing steel, thereby providing an effective approach to improve the hydrogen embrittlement of ultra-high strength steels.
ISSN:1452-3981
1452-3981
DOI:10.20964/2022.06.49