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Analysis of enhanced hydrogen embrittlement fracture for pre-strain hardening 2205 duplex stainless steel.
- Source :
- Results in Physics; Mar2020, Vol. 16, pN.PAG-N.PAG, 1p
- Publication Year :
- 2020
-
Abstract
- The enhanced behavior of hydrogen embrittlement (HE) fracture for pre-strain hardening 2205 duplex stainless steel was investigated. Specimens with various degrees of engineering strain were pre-charged by cathodic charging, and then immediately loaded up to facture under uniaxial tensile test. Results demonstrated that the susceptibility to HE increased with increasing level of pre-deformation, manifested by loss of ductility and transition from dimple fracture to quasi-cleavage morphology. Post-mortem microstructural analyses revealed hydrogen-induced cracks preferentially initiated at ferritic sites in less pre-strained specimens (0% and 5%), whereas cracks tended to form at austenitic sites in pre-strained specimens with large pre-deformations (10%, 15% and 20%). This is mainly owing to the difference of increased plastic strain and dislocation density in ferrite and austenite caused by plastic deformation after pre-strain hardening. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 22113797
- Volume :
- 16
- Database :
- Supplemental Index
- Journal :
- Results in Physics
- Publication Type :
- Academic Journal
- Accession number :
- 143682298
- Full Text :
- https://doi.org/10.1016/j.rinp.2019.102820