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Evidence for hydrogen-assisted recovery of cold-worked palladium: hydrogen solubility and mechanical properties studies

1 Department of Chemistry, University of Hartford, West Hartford, CT 06117, USA
2 Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
3 College of Engineering, Phoenicia University, Zahrani, South Lebanon
4 Department of Mechanical Engineering, Lafayette College, Easton, PA 18042, USA
5 Department of Chemistry, University of Vermont, Burlington, VT 05405, USA

Topical Section: Energy and Materials Science

The influence of hydrogen as an agent to accelerate the thermal recovery of cold-worked palladium has been investigated. The techniques used to characterize the effects of hydrogen on the thermal recovery of palladium were hydrogen solubility and mechanical property measurements. Results show that the presence of modest amounts of hydrogen during annealing of cold-worked palladium does enhance the degree of thermal recovery, with a direct correlation between the amount of hydrogen during annealing and the degree of recovery. The results indicate that the damage resulting from cold-working palladium can be more effectively and efficiently reversed by suitable heat treatments in the presence of appropriate amounts of hydrogen, as compared to heat treatment in vacuum. The somewhat novel technique of using changes in the hydrogen solubility of palladium as an indicator of thermal recovery has been validated and complements the more traditional technique of mechanical property measurements.
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Keywords palladium; hydrogen; embrittlement; cold-work; recovery; dislocations; solubility

Citation: Maria Ferrer, Joshua Nott, Joseph Prinke, Sofia Goodrich, Fred Massicotte, Karim Rebeiz, Steve Nesbit, Ted B. Flanagan, Andrew Craft. Evidence for hydrogen-assisted recovery of cold-worked palladium: hydrogen solubility and mechanical properties studies. AIMS Energy, 2017, 5(4): 625-635. doi: 10.3934/energy.2017.4.625


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