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Intergranular cracks in the uncharged specimen were arrested at low-angle prior austenite grain boundary (PAGB) segments of several micrometers. In contrast, even small, low-angle PAGB segments with sub-micrometer sizes impeded the propagation of hydrogen-related intergranular crack. At the hydrogen-related quasi-cleavage crack tip, the crystallographic orientation changed abruptly, and deformation microstructures developed, including the formation of low-energy dislocation structures. A certain degree of crack growth resistance (intrinsic crack growth resistance) in the hydrogen-related fractures could be attributed to the intense localized plastic works involved in the arrest of intergranular cracks and the propagation of quasi-cleavage cracks.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Steel, SEM, STEM, Hydrogen embrittlement

刊行年月日: 2024-04-27

出版者: Elsevier BV

掲載誌:

• Corrosion Science (ISSN: 0010938X) vol. 233 112092

研究助成金:

• Japan Society for the Promotion of Science JP22K18910
• Japan Society for the Promotion of Science JP23H01717
• Government of Japan Ministry of Education Culture Sports Science and Technology JPMXP1122684766
• Japan Science and Technology Agency
• Precursory Research for Embryonic Science and Technology JPMJPR2096

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.corsci.2024.112092

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更新時刻: 2024-08-22 08:30:22 +0900

MDRでの公開時刻: 2024-08-22 08:30:22 +0900