Transformation mismatch plasticity in Pd induced by cyclic hydrogen charging

Ofer Beeri*, David C Dunand

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Transformation mismatch plasticity is achieved in swaged palladium wires by cyclical hydriding-dehydriding. Upon multiple cycles at ambient temperature, a total strain of ∼40% is accumulated under a constant tensile stress. This value is much higher than the tensile ductility for swaged Pd subjected to monotonic deformation without transformation (<2% for this wire). Strain increments after a single cycle are proportional to the applied stress, in agreement with the Greenwood-Johnson equation for transformation mismatch plasticity. The yield stress of hydrogen-cycled Pd calculated from this equation is 760 MPa, which is much higher than the value of the original wire and about 50% higher than previous values reported for Pd that was hydrogen cycled at 100 °C without an applied stress.

Original languageEnglish (US)
Pages (from-to)178-183
Number of pages6
JournalMaterials Science and Engineering A
Volume523
Issue number1-2
DOIs
StatePublished - Oct 15 2009

Keywords

  • Hydrogen
  • Palladium
  • Palladium-hydride
  • Transformation mismatch plasticity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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