Mechanical spectroscopy of Ti-15Zr-based alloys with Mo addition
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Data
2017-01-01
Autores
Correa, Diego Rafael Nespeque
Rocha, Luís Augusto [UNESP]
Grandini, Carlos Roberto [UNESP]
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Resumo
In this paper, the effect of substitutional Mo amounts in internal friction and interstitial diffusion mechanisms was analyzed in Ti-15Zr-based alloys. Mechanical spectroscopy was obtained from room temperature up to 730 K with frequencies between 1 Hz and 40 Hz. Internal friction spectra were composed by anelastic relaxation peaks in β-type alloys (metastable and stable), due to stress-induced ordering of oxygen and nitrogen interstitially in octahedral sites of the bcc crystalline structure. Peak decomposition analysis exhibited interactions between matrix-interstitial (Ti-O and Ti-N), substitutional-interstitial (Zr-O, Mo-O and Mo-N), and clusters (Ti-O-O and Zr-O-O). The diffusion results showed that the introduction of Mo facilitates the diffusion of interstitial elements in the metallic matrix.
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Diffusion, Internal friction, Interstitial elements, Ti-Zr-Mo alloys
Como citar
Materials Research, v. 20, p. 688-693.