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De Fenzo A.,Materials and Production Engineering | Scherillo F.,Materials and Production Engineering | Astarita A.,Materials and Production Engineering | Testani C.,Centro Sviluppo Materiali S.p.A | And 2 more authors.
Corrosion Science | Year: 2015

The correlation between microstructure of Hot Isostatic Pressing Ti6Al4V, hot deformed, and his electrochemical behavior, has been studied. The specimens have been compressed at three temperatures (900°C, 1000°C, 1100°C), and three different strain rates (0.01s-1, 0.1s-1, 1s-1).Optical and SEM observations have been performed and porosity cluster have been observed for specimens deformed at 900°C and 1100°C at 0.1s-1 and 1s-1.Potentiodynamic polarization and Electrochemical Impedance Spectroscopy (EIS) have been carried out in NaCl 3.5. wt% solution and the data modeled by Zplot © software. Electric parameters collected, confirmed that the microstructure influences electrochemical behavior of specimens. © 2015 Elsevier Ltd.

Caputo F.,The Second University of Naples | De Luca A.,The Second University of Naples | Lamanna G.,The Second University of Naples | Lopresto V.,Materials and Production Engineering | Riccio A.,The Second University of Naples
Composites Part B: Engineering | Year: 2014

In order to study the onset and the evolution of low velocity impact damages in Carbon-Epoxy plates, a numerical investigation has been led. A detailed finite element model has been created by using the finite element code Abaqus® which, thanks to the different implemented algorithms, allowed considering both intra-laminar and inter-laminar failure criteria. In particular, the numerical modelling technique of such failure criteria allowed predicting delamination growth, by using special purpose-elements (cohesive elements) and fiber and matrix failure, by using Hashin criteria. Moreover, with the aim to reduce the required CPU time, a global/local finite element modelling approach has been proposed. For validation purpose, numerical results have been compared with data from two sessions of experimental impact tests. The considered impact energy values are 6 J, 10 J and 13 J respectively. © 2014 Elsevier Ltd. All rights reserved.

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