<p>Zr-2.5Nb pressure tube material exhibits strong anisotropy in mechanical properties owing to its microstructure and texture. In this work, an effort has been made to delineate the contributions from both these factors in the overall anisotropy of the material by imparting suitable heat treatments. The hardness and Young’s modulus of as-received and heat-treated material were estimated along three orthogonal directions through nano-indentation and have been correlated with the materials microstructure and texture. Micro-hardness measurements have been carried out on pressure tube samples charged with different hydrogen concentrations to explore if the presence of hydrogen has any influence on the anisotropy of the material. The combined effect of hydrogen and heat treatment on anisotropy has also been investigated.</p>

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Exploring Anisotropy in Zr-2.5%Nb Pressure Tube Material through Hardness Measurements: Role of Microstructure and Hydrogen Concentration

  • Arnomitra Chatterjee,
  • R. N. Singh

摘要

Zr-2.5Nb pressure tube material exhibits strong anisotropy in mechanical properties owing to its microstructure and texture. In this work, an effort has been made to delineate the contributions from both these factors in the overall anisotropy of the material by imparting suitable heat treatments. The hardness and Young’s modulus of as-received and heat-treated material were estimated along three orthogonal directions through nano-indentation and have been correlated with the materials microstructure and texture. Micro-hardness measurements have been carried out on pressure tube samples charged with different hydrogen concentrations to explore if the presence of hydrogen has any influence on the anisotropy of the material. The combined effect of hydrogen and heat treatment on anisotropy has also been investigated.