Hochverformung von hexagonalen Metallen: Kobalt, Gadolinium und Titan

Translated title of the contribution: Severe plastic deformation of hexagonal metals: cobalt, gadolinium and titanium

Doris Luef

Research output: ThesisDiploma Thesis

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Abstract

The application of Severe Plastic Deformation (SPD) is an important procedure for producing grain refinement in bulk crystalline solids down to the nano regime. The most important techniques are High Pressure Torsion (HPT) and Equal Channel Angular Pressing (ECAP). The advantage of HPT over ECAP is that a higher degree of deformation, consequently higher strains and therefore finer grains can be reached. The aim of this work was to characterize the changing of the microstructure, the hardness and the tensile strength during HPT of cobalt, gadolinium and titanium. The samples have been deformed at temperatures between -196°C and 650°C and it was shown, that deformation at room temperature leads to a grain size of a few nanometres. An increase of hardness and tensile strength could also be achieved. The difference of the deformation behavior of face center cubic, body center cubic and hexagonal metals was discussed.
Translated title of the contributionSevere plastic deformation of hexagonal metals: cobalt, gadolinium and titanium
Original languageGerman
QualificationDipl.-Ing.
Supervisors/Advisors
  • Pippan, Reinhard, Supervisor (internal)
Award date26 Jun 2009
Publication statusPublished - 2009

Bibliographical note

embargoed until null

Keywords

  • High Pressure Torsion Cobalt Gadolinium Titanium Tensile Test

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