Abstract
The study focuses on establishing the terminal solid solubility of hydrogen in an alpha-phase titanium alloy, Ti–Al–Zr. Hydrogen was charged into the material by an electrolytic charging method. The electrolytic charging was done for 96 h in 1 N sulphuric acid by varying cathodic current density ranging from 10 to 100 mA/cm2. Heat treatment was given to the specimen at 450 °C for 4 h in the air (followed by air cooling) to homogenize the hydride. The differential scanning calorimetry (DSC) technique was employed to study the enthalpy associated with the dissolution and precipitation of hydride. The enthalpy for the dissolution of the hydride was 30.7 kJ/mol and the enthalpy for the precipitation of the hydride was 15.5 kJ/mol. The extent of thermal hysteresis ranged between 0.25 and 0.34. The synergistic effect of alloying elements on the solubility tendency of hydrogen in the alloy is discussed.
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Acknowledgments
The author would like to acknowledge the effort of Dr. Sudip Kumar Sarkar for helping in carrying out the DSC experiments.
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Sinha, P.K. Terminal Solid Solubility of Hydrogen in an Alpha-Phase Titanium Alloy. Metall Mater Trans A 54, 3112–3117 (2023). https://doi.org/10.1007/s11661-023-07081-1
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DOI: https://doi.org/10.1007/s11661-023-07081-1