Abstract
The low temperature deformation of zirconium (by slip and twinning) is strongly dependent on the presence of interstitial oxygen. In order to investigate the relationships between deformation modes and defects creation, the influence of oxygen additions (up to 386 wt ppm) on the tensile deformation and resistivity variation of iodide zirconium, has been studied in the temperature range 4.2 K-300 K. At 4.2 K, the increase of resistivity during deformation is faster in the doped materials, and a resistivity recovery stage appears around 35 K. The comparison with the mechanical properties and with the metallographic observation of twins shows that the larger resistivity increase at 4.2 K is not connected with a change in deformation mechanism, but should be rather ascribed to the creation of oxygen-specific defects.
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