Physical aging effects on the dynamic relaxation behavior and mechanical properties of Cu46Zr46Al8 metallic glass
Visualitza/Obre
10.1016/j.jallcom.2017.07.291
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/112906
Tipus de documentArticle
Data publicació2017-12-05
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
Mechanical relaxation of glassy materials is strongly influenced by their mechanical and physical properties. In the current study, dynamic mechanical relaxation of Cu46Zr46Al8 metallic glass has been investigated by mechanical spectroscopy and molecular dynamics simulations. Our results show that mechanical properties of metallic glasses are highly dependent on their thermal history. a relaxation in the frequency region of the Cu46Zr46Al8 metallic glass was described by Havriliak-Negami (HN) model. In the framework of the quasi-point defects theory, the correlated factor ¿ could be used to characterize the concentration of “defects” of glassy materials. By molecular dynamics simulations of dynamic mechanical tests at different temperatures and frequencies, it is noted that adjusting of defects is inversely correlated to storage modulus at the atomic level. On the other hand, physical aging below the glass transition temperature Tg reduces the concentration of defects and narrows down the width of shear bands, which corresponds to decreasing of the atomic mobility.
CitacióQiao, J., Feng, S., Pelletier, J., Crespo, D., Pineda, E., Yao, Y. Physical aging effects on the dynamic relaxation behavior and mechanical properties of Cu46Zr46Al8 metallic glass. "Journal of alloys and compounds", 5 Desembre 2017, vol. 726, p. 195-200.
ISSN0925-8388
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
JALCOM-D-17-05414-UPCCommons.pdf | 1,084Mb | Visualitza/Obre |