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Effect of dynamical heating on microstructure and microhardness of Ni processed by high-pressure torsion

Authors
Journal
Materials Letters
0167-577X
Publisher
Elsevier
Publication Date
Volume
60
Identifiers
DOI: 10.1016/j.matlet.2006.03.127
Keywords
  • Ni
  • High-Pressure Torsion
  • Annealing
  • Microstructure
  • Microhardness

Abstract

Abstract The microstructures and microhardness of pure Ni processed by high-pressure torsion and their evolution upon dynamical heating from room temperature to 200 °C at a heating rate of 20 °C/min were investigated. The annealing resulted in further refinement of grains, formation of more fraction of high-angle grain boundaries (GBs), modification of state of GBs and ordering of dislocations. As a result of the microstructural optimization, the microhardness of the material was increased but not decreased after the dynamical heating.

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