20.500.12556/DiRROS-18980 Susceptibility of X17CrNi16-2 martensitic stainless steel to hydrogen embrittlement after conventional and deep cryogenic heat treatment A low carbon/ high chromium martensitic stainless steel, X17CrNi16-2, was heat treated using two different hardening and tempering regimes (1050 ◦ C/480 ◦ C or 980 ◦C/600 ◦C) — promoting either a high strength or high toughness state, respectively and further combined with deep cryogenic treatment (DCT) at 196 ◦C for 24 h. Over recent years DCT has been recognized as a promising technique to improve the properties of steel, predominantly with respect to its tensile strength, toughness and wear resistance. The influence of DCT on the hydrogen embrittlement resistance of martensitic stainless steel has not yet, however, been reported. A slow strain rate tensile test (SSRT) with simultaneous cathodic hydrogen charging was selected as the method to assess potential susceptibility to hydrogen embrittlement (HE). Relatively low-intensity hydrogen charging, utilizing a constant current density of 0.1 mA/cm2, in a non-corrosive, slightly alkaline buffer solution, led to a clear reduction in the ultimate tensile stress. This reduction, and therefore the HE susceptibility, was more pronounced in the steel with a higher strength (i.e. that subject to the 1050 ◦C/ 480 ◦C heat treatment condition). Furthermore, DCT did not appear to have any impact on the steel’s mechanical properties in the presence of hydrogen. Fractographic analysis showed clear evidence of HE in the hydrogen-charged specimens. This paper presents results of the SSRT tests and further fractography results, and discusses the impact of conventional and deep cryogenic treatment on HE susceptibility. martensitic stainless steel deep cryogenic treatment hydrogen embrittlement slow strain rate tensile test martenzitno nerjavno jeklo globoko kriogensko podhlajevanje vodikova krhkost test s počasno hitrostjo rasti natezne deformacije true false true Elsevier Angleški jezik Slovenski jezik © 2024 The Authors. Neznano 2024-05-23 11:51:55 2024-05-23 11:58:46 2024-05-24 03:40:31 0000-00-00 00:00:00 2024 0 0 Received 20 February 2024; Received in revised form 6 April 2024; Accepted 2 May 2024; Nasl. z nasl. zaslona; Opis vira z dne 6. 5. 2024; str. 1-11 [article no.] 108403 Vol. 162 Aug. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-05-04 54 1873-1961 10.1016/j.engfailanal.2024.108403 194430723 https://www.sciencedirect.com/science/article/pii/S1350630724004497?via%3Dihub 1 179093c0-18ea-11ef-9c9e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26020 RAZ_Bajt_Leban_Mirjam_2024.pdf RAZ_Bajt_Leban_Mirjam_2024.pdf 1 F3E1D53281F678D3B791A26F7BDC17F1 5a6b5621cfa263512852a7e8b59c34b5653baaef0160a7ae3a39ad892e82073d f856a9f6-18ea-11ef-9c9e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26022 Zavod za gradbeništvo Slovenije 0 0 0