Internal friction and shear modulus of Ti32Zr18Ni50hydrogen storage alloy
| Autor: | Juan Manuel Vélez, A.A. Ghilarducci, Horacio Salva, H. A. Colorado Lopera, César Augusto Chaves Roldán |
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| Rok vydání: | 2005 |
| Předmět: |
Austenite
Materials science Hydrogen Mechanical Engineering Metallurgy Alloy chemistry.chemical_element engineering.material Plasticity Condensed Matter Physics Shear modulus Differential scanning calorimetry chemistry Mechanics of Materials Diffusionless transformation engineering General Materials Science Grain boundary Composite material |
| Zdroj: | Materials Science and Technology. 21:191-196 |
| ISSN: | 1743-2847 0267-0836 |
| DOI: | 10.1179/174328405x20978 |
| Popis: | Internal friction and shear modulus measurements were carried out in a Ti32Zr18Ni50 alloy to study the effect of martensitic transformation on hydrogenation properties. The temperatures of martensitic transformation and austenitic transformation weredetermined. The results were compared to those obtained by electrical resistivity and differential scanning calorimetry techniques. The experiments showed two peaks of internal friction, one associated withdislocation relaxations and the other with phase transformations. The microstructurecharacterisation was carried out by scanning electron microscopy. The phase (Ti, Zr)2Ni was found mainly precipitated in grain boundaries. Some experiments were carried out in specimens with previous plastic strain and another set of samples was tested in a hydrogen atmosphere.With increasing plastic strain, the amplitude of the peak associated with dislocations decreased. Hydrogen addition during the testsled to an increase in the temperature of maximum internal fric... |
| Databáze: | OpenAIRE |
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