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

被引：10

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.

引用

页数：7

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