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Time-resolved grazing-incidence X-ray diffraction measurement to understand the effect of hydrogen on surface strain development in super duplex stainless steel

DOI: 10.1016/j.scriptamat.2020.05.061 DOI Help

Authors: Cem Ornek (KTH Royal Institute of Technology; Istanbul Technical University) , Alfred Larsson (Lund University) , Gary S. Harlow (Lund University) , Fan Zhang (KTH Royal Institute of Technology) , Robin Kroll (University of Manchester) , Francesco Carla (Diamond Light Source) , Hadeel Hussain (Diamond Light Source) , Ulf Kivisäkk (Sandvik Materials Technology) , Dirk L. Engelberg (University of Manchester) , Edvin Lundgren (Lund University) , Jinshan Pan (KTH Royal Institute of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scripta Materialia , VOL 187 , PAGES 63 - 67

State: Published (Approved)
Published: October 2020
Diamond Proposal Number(s): 23388

Open Access Open Access

Abstract: Grazing-incidence x-ray diffraction was employed to measure, operando, during electrochemical hydrogen charging, the lattice strain development of the near-surface in super duplex stainless steel under applied tensile load. Hydrogen absorption led to the formation of tensile strains in both the austenite (γ) and ferrite (δ) phases perpendicular to the loading axis, whereas compressive strains were formed in the ferrite phase parallel to the loading direction, despite the acting tensile load. The earliest stages of degradation are discussed in light of understanding hydrogen embrittlement.

Journal Keywords: X-ray diffraction (XRD); Synchrotron radiation; Stainless steels; Dual phases; Hydrogen embrittlement

Subject Areas: Materials


Instruments: I07-Surface & interface diffraction

Documents:
1-s2.0-S135964622030350X-main.pdf