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EnglishMicrostructure stability of the directionally solidified Ni base IN792 superalloy has been investigated by Mechanical Spectroscopy (MS), i.e. internal friction (IF) and dynamic modulus measurements. Repeated IF test runs from room temperature to 1173 K have been carried out on the same samples and a Q-1 maximum has been always observed above 700 K. Its position does not depend on the resonance frequency. After each run the values of modulus and Q-1 at room temperature change indicating that a progressive irreversible transformation occurs. Damping phenomena have been attributed to the rearrangement of dislocation structures in disordered matrix which modifies dislocation density and average distance of pinning points. The results are supported by X-ray diffraction (XRD) and transmission electron microscopy (TEM) observations.
Montanari, R., Tassa, O., & Varone, A. (2017). Early instability phenomena of IN792 DS superalloy. In Materials Science Forum (pp.2026-2031). Trans Tech Publications Ltd [10.4028/www.scientific.net/MSF.879.2026].
| Autori: | ||
| Autori: | Montanari, R; Tassa, O; Varone, A | |
| Titolo: | Early instability phenomena of IN792 DS superalloy | |
| Nome del convegno: | 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 | |
| Luogo del convegno: | aut | |
| Anno del convegno: | 2016 | |
| Enti collegati al convegno: | The Minerals, Metals and Materials Society (TMS), USA | |
| Rilevanza: | Rilevanza internazionale | |
| Data di pubblicazione: | 2017 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.4028/www.scientific.net/MSF.879.2026 | |
| Settore Scientifico Disciplinare: | Settore ING-IND/21 | |
| Lingua: | English | |
| URL: | http://www.ttp.net/0255-5476.html | |
| Tipologia: | Intervento a convegno | |
| Citazione: | Montanari, R., Tassa, O., & Varone, A. (2017). Early instability phenomena of IN792 DS superalloy. In Materials Science Forum (pp.2026-2031). Trans Tech Publications Ltd [10.4028/www.scientific.net/MSF.879.2026]. | |
| Appare nelle tipologie: | 02 - Intervento a convegno |
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