Deformation of Ag/1.2 at.% Mg

K. C. Goretta, J. L. Routbort, R. L. Thayer, J. P. Carroll, J. Wolfenstine, J. Kessler, J. Schwartz

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19 Scopus citations

Abstract

Mechanical properties of Ag/1.2 at.% Mg were measured at room temperature in air and at 900°C in Ar or O2. Exposure to O2 at 900°C induced formation of MgO precipitates, which hardened the material and decreased its ductility substantially at both temperatures. At room temperature, oxidation increased the yield strength by a factor of ∼ 8 and the stiffness by ∼ 16%. At 900°C and strain rates of 3 x 10-6 to 10-4 s-1, deformation was strongly dependent on atmosphere: in Ar, the alloy deformed by dislocation motion and underwent dynamic recrystallization; in O2, the yield stress increased by a factor of ∼ 10, but the specimens fractured after limited plasticity.

Original languageEnglish (US)
Pages (from-to)201-206
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume265
Issue number3-4
DOIs
StatePublished - Jul 10 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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