Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering Steel
Electrochemical H charging, hydrogen permeation, and hydrogen-induced cracking (HIC) behavior of 690 MPa grade steel substrate and different heat-treatment states (annealed, quenched, normalized, tempered) are investigated by cyclic voltammetry (CV), hydrogen permeation, electrochemical H charging,...
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MDPI AG
2021-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/4/851 |
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| author | Heng Ma Huiyun Tian Juncheng Xin Zhongyu Cui |
| author_facet | Heng Ma Huiyun Tian Juncheng Xin Zhongyu Cui |
| author_sort | Heng Ma |
| collection | DOAJ |
| description | Electrochemical H charging, hydrogen permeation, and hydrogen-induced cracking (HIC) behavior of 690 MPa grade steel substrate and different heat-treatment states (annealed, quenched, normalized, tempered) are investigated by cyclic voltammetry (CV), hydrogen permeation, electrochemical H charging, and slow strain rate tensile test (SSRT). The results show that hydrogen diffuses through the steel with the highest rate in base metal and the lowest rate in annealed steel. The hydrogen-induced cracks in base metal show obvious step shape with tiny cracks near the main crack. The cracks of annealed steel are mainly distributed along pearlite. The crack propagation of quenched steel is mainly transgranular, while the hydrogen-induced crack propagation of tempered steel is along the prior austenite grain boundary. HIC sensitivity of base metal is the lowest due to its fine homogeneous grain structure, small hydrogen diffusion coefficient, and small hydrogen diffusion rate. There are many hydrogen traps in annealed steel, such as the two-phase interface which provides accommodation sites for H atoms and increases the HIC susceptibility. |
| first_indexed | 2024-03-09T04:47:34Z |
| format | Article |
| id | doaj.art-1abd455d17b646c8a8f7def6e9c1e130 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T04:47:34Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-1abd455d17b646c8a8f7def6e9c1e1302023-12-03T13:13:21ZengMDPI AGMaterials1996-19442021-02-0114485110.3390/ma14040851Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering SteelHeng Ma0Huiyun Tian1Juncheng Xin2Zhongyu Cui3Yinshan Section Steel Corporation of Laiwu Steel Group Ltd., Jinan 271104, ChinaSchool of Materials Science and Engineering, Inorganic Materials Faculty, Ocean University of China, Qingdao 266100, ChinaSchool of Materials Science and Engineering, Inorganic Materials Faculty, Ocean University of China, Qingdao 266100, ChinaSchool of Materials Science and Engineering, Inorganic Materials Faculty, Ocean University of China, Qingdao 266100, ChinaElectrochemical H charging, hydrogen permeation, and hydrogen-induced cracking (HIC) behavior of 690 MPa grade steel substrate and different heat-treatment states (annealed, quenched, normalized, tempered) are investigated by cyclic voltammetry (CV), hydrogen permeation, electrochemical H charging, and slow strain rate tensile test (SSRT). The results show that hydrogen diffuses through the steel with the highest rate in base metal and the lowest rate in annealed steel. The hydrogen-induced cracks in base metal show obvious step shape with tiny cracks near the main crack. The cracks of annealed steel are mainly distributed along pearlite. The crack propagation of quenched steel is mainly transgranular, while the hydrogen-induced crack propagation of tempered steel is along the prior austenite grain boundary. HIC sensitivity of base metal is the lowest due to its fine homogeneous grain structure, small hydrogen diffusion coefficient, and small hydrogen diffusion rate. There are many hydrogen traps in annealed steel, such as the two-phase interface which provides accommodation sites for H atoms and increases the HIC susceptibility.https://www.mdpi.com/1996-1944/14/4/851low-alloy steelheat treatmentcyclic voltammetryhydrogen permeationHIC |
| spellingShingle | Heng Ma Huiyun Tian Juncheng Xin Zhongyu Cui Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering Steel Materials low-alloy steel heat treatment cyclic voltammetry hydrogen permeation HIC |
| title | Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering Steel |
| title_full | Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering Steel |
| title_fullStr | Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering Steel |
| title_full_unstemmed | Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering Steel |
| title_short | Correlation between Microstructure and Hydrogen Degradation of 690 MPa Grade Marine Engineering Steel |
| title_sort | correlation between microstructure and hydrogen degradation of 690 mpa grade marine engineering steel |
| topic | low-alloy steel heat treatment cyclic voltammetry hydrogen permeation HIC |
| url | https://www.mdpi.com/1996-1944/14/4/851 |
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