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Effect of Liquid Hydrogen Exposure on Mechanical and Fracture Properties of Ti-5Al-2.5Sn-ELI Alloy in Vacuum Annealed Condition

Manikandan P.*, Naresh Kumar K.**, Sudarshan Rao G.***, Sushant K Manwatkar****, Venugopal A.*****, Satish Kumar Singh******, Govind*******

*-******* Materials and Mechanical Entity, Vikram Sarabhai Space Center, Thiruvananthapuram, Kerala, India.

Periodicity:January - March'2025

Abstract

Ti-5Al-2.5Sn is an extra low interstitial (ELI) grade titanium alloy used in spherical gas bottles submerged in liquid hydrogen (LH2) tanks at cryogenic temperature (20 K). It is essential to study the effect of LH2 exposure on the mechanical and fracture properties of the alloy. The impact of LH2 on the fracture toughness and other mechanical properties, such as tensile properties, impact strength, and notch tensile strength (NTS) of the alloy Ti-5Al-2.5Sn, has been studied at room and cryogenic temperatures. The results show that there was a marginal degradation in fracture toughness and ductility of the alloy due to LH2 exposure. However, fractography analysis revealed that the fracture morphology of the alloy exhibits a typical ductile mode of failure in the presence and absence of LH2.

Keywords

Fracture Toughness, Liquid Hydrogen Exposure, Ti-5Al-2.5Sn-ELI Alloy, Tensile Strength, Notch Tensile Strength, Impact Strength.

How to Cite this Article?

Manikandan, P., Kumar, K. N., Rao, G. S., Manwatkar, S. K., Venugopal, A., Singh, S. K., and Govind. (2025). Effect of Liquid Hydrogen Exposure on Mechanical and Fracture Properties of Ti-5Al-2.5Sn-ELI Alloy in Vacuum Annealed Condition. i-manager’s Journal on Material Science, 12(4), 9-16.

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Effect of Liquid Hydrogen Exposure on Mechanical and Fracture Properties of Ti-5Al-2.5Sn-ELI Alloy in Vacuum Annealed Condition

Abstract

Keywords

How to Cite this Article?

References

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