Investigation of quasi-cleavage in a hydrogen charged maraging stainless steel

被引：8
|
作者：
Bestautte, Jolan [1 ]
Kalacska, Szilvia [1 ,2 ]
Bechet, Denis [3 ]
Obadia, Zacharie [4 ]
Christien, Frederic [1 ]
机构：
[1] Univ Lyon, CNRS, Mines St Etienne, UMR LGF 5307,Ctr SMS, 158 Cours Fauriel, F-42023 Saint Etienne, France
[2] Empa Swiss Fed Labs Mat Sci & Technol, Lab Mech Mat & Nanostruct, Feuerwerkerstr 39, CH-3602 Thun, Switzerland
[3] Aubert & Duval, F-63770 Les Ancizes, France
[4] Airbus Commercial Aircraft, Toulouse, France
来源：
CORROSION SCIENCE | 2023年 / 218卷
关键词：
Hydrogen embrittlement; Fracture; Maraging steels; Electron backscattering diffraction (EBSD); FRACTURE-BEHAVIOR; MARTENSITE; EMBRITTLEMENT; DENSITY;
D O I：
10.1016/j.corsci.2023.111163
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Slow strain rate tests on hydrogen-containing specimens of PH13-8Mo maraging stainless steel showed H-assisted subcritical quasi-cleavage cracking, accelerating material failure. Fractographic analysis revealed that quasi-cleavage is composed of flat brittle areas and rougher areas. Electron backscatter diffraction (EBSD) was performed on a secondary subcritically grown crack. High resolution EBSD showed significant crystal lattice rotation, hence consequential plastic deformation, concentrated between the main crack tip and the cracks located ahead of it. Quasi-cleavage consisted of {100} cleavage cracks connected by ductile ridges, suggesting a discontinuous mechanism, involving re-initiation of new cleavage cracks ahead the main crack tip.
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页数：7
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