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International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions

Editor
B. P. Somerday
B. P. Somerday
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P. Sofronis
P. Sofronis
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ISBN:
9780791860298
No. of Pages:
844
Publisher:
ASME Press
Publication date:
2014

The intrinsic temperature dependence of internal hydrogen assisted cracking (IHAC) of 2¼Cr-1Mo steel base plate and weld metal is measured with several fracture mechanics approaches, including a new-slotted specimen. Slow-rising displacement threshold stress intensity (KIH) increases as IHAC is eliminated with rising temperature from -50 to 125°C. Hydrogen concentration proximate to the crack tip (C), stress enhanced and microstructure trapped, provides a similitude parameter; equal KIH is produced for equal C. The C from FEA diffusion analysis decreases with decreasing-bulk H concentration and decreasing-exponential of the H-binding energy to temperature ratio for trap sites along...

Introduction
Experimental Procedure
Results
Analysis
Discussion
Conclusions
Acknowledgements
References
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