TY - JOUR
T1 - A microstructure-based mechanism of cracking in high temperature hydrogen attack
AU - Martin, M. L.
AU - Dadfarnia, M.
AU - Orwig, S.
AU - Moore, D.
AU - Sofronis, P.
N1 - Funding Information:
The authors would like to acknowledge the funding and technical support from BP through the BP International Centre for Advanced Materials (BP-ICAM) which made this research possible. Microscopy was carried out in part in the Frederick Seitz Materials Research Laboratory Central Research Facilities, University of Illinois. The authors gratefully acknowledge M. Lozev for assistance, support and discussion. MLM and PS are grateful to Dr. A. Nagao for help with analyzing the steel composition.
Publisher Copyright:
© 2017 Acta Materialia Inc.
PY - 2017/11
Y1 - 2017/11
N2 - High Temperature Hydrogen Attack (HTHA) of steels plagues higher temperature industrial applications, especially in the petrochemical industry, due to the lack of a mechanistic understanding of the phenomenon and the use of empirically established design criteria, such as the Nelson curves. By using advanced microscopy techniques to explore the microstructure immediately ahead of crack tips and along cavitated grain boundaries, we gained a better understanding of the physical processes occurring early during the HTHA damage process, which can guide the development of models for the degradation process accounting for methane formation and creep cavitation. The results confirm the fundamentals of previously proposed models, but also provide finer details than have been previously known. Based on the underlying deformation and grain boundary fracture, we propose a model for material failure underlying HTHA.
AB - High Temperature Hydrogen Attack (HTHA) of steels plagues higher temperature industrial applications, especially in the petrochemical industry, due to the lack of a mechanistic understanding of the phenomenon and the use of empirically established design criteria, such as the Nelson curves. By using advanced microscopy techniques to explore the microstructure immediately ahead of crack tips and along cavitated grain boundaries, we gained a better understanding of the physical processes occurring early during the HTHA damage process, which can guide the development of models for the degradation process accounting for methane formation and creep cavitation. The results confirm the fundamentals of previously proposed models, but also provide finer details than have been previously known. Based on the underlying deformation and grain boundary fracture, we propose a model for material failure underlying HTHA.
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U2 - 10.1016/j.actamat.2017.08.051
DO - 10.1016/j.actamat.2017.08.051
M3 - Article
AN - SCOPUS:85028509394
SN - 1359-6454
VL - 140
SP - 300
EP - 304
JO - Acta Materialia
JF - Acta Materialia
ER -