Hydrogen-induced transformation superplasticity in zirconium

Eunji Hong, David C. Dunand, Heeman Choe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Commercially-pure zirconium is alloyed and dealloyed repeatedly with hydrogen at 810 °C, thereby cyclically triggering phase transformations between hydrogen-free α-Zr and hydrogen-alloyed β-Zr. Under an externally applied tensile stress, the internal mismatch stresses produced by the α-β transformations are biased, resulting in the accumulation of strain increments after each chemical cycle in the direction of the applied stress. Two key parameters, i.e., half-cycle time and applied stress, are examined to determine their effects on the strain increments. A tensile strain of 133% is achieved without fracture after multiple chemical cycles, demonstrating for the first time transformation superplasticity in zirconium induced by isothermal hydrogen cycling.

Original languageEnglish (US)
Pages (from-to)5708-5713
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number11
DOIs
StatePublished - Jun 1 2010

Keywords

  • Hydride
  • Hydrogen
  • Mechanical properties
  • Superplastic deformation
  • Zirconium

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Fingerprint Dive into the research topics of 'Hydrogen-induced transformation superplasticity in zirconium'. Together they form a unique fingerprint.

Cite this