Publications de Paolo Di Napoli

Publications associées (7)

Phase-field modeling of the dendrite orientation transition in Al-Zn alloys

Michel Rappaz, Paolo Di Napoli, Jonathan Friedli

With a few exceptions, phase-field simulations of dendritic growth in cubic materials have been modeled using simple expressions for the interfacial energy anisotropy and with strong anisotropy. However, recent experimental results show that the Dendrite O ...

Iop Publishing Ltd2012

Dendritic Growth Morphologies in Al-Zn Alloys-Part I: X-ray Tomographic Microscopy

Michel Rappaz, Paolo Di Napoli, Jonathan Friedli

Upon solidification, most metallic alloys form dendritic structures that grow along directions corresponding to low index crystal axes, e.g., directions in fcc aluminum. However, recent findings[1,2] have shown that an increase in the zinc content in Al-Zn ...

Springer Verlag2013

Numerical simulation of microstructure formation during solidification and heat treatments of Ni-base superalloys

Alain Jacot, Charles-André Gandin, Paolo Di Napoli, Luc Rougier

A comprehensive modelling approach has been developed for the simulation of microstructure formation during solidification and heat treatment in Ni-base superalloys. The microsegregation taking place during solidification is simulated using the pseudo-fron ...

2012

Numerical simulation of precipitation in multicomponent Ni-base alloys

Charles-André Gandin, Alain Jacot, Paolo Di Napoli, Luc Rougier

A comprehensive particle size distribution model has been developed for the simulation of gamma' precipitation in multicomponent Ni alloys. Nucleation, growth and coarsening of the precipitates are described by a particle size distribution. The growth rate ...

Elsevier2013

X-ray tomographic microscopy analysis of the dendrite orientation transition in Al-Zn

Michel Rappaz, Paolo Di Napoli, Jonathan Friedli

Recently, Gonzales and Rappaz [Met. Mat. Trans. A37:2797, 2006] showed the influence of an increasing zinc content on the growth directions of aluminum dendrites. < 100 > and < 110 > dendrites were observed below 25wt.% and above 55wt.% zinc, respectively, ...

Iop Publishing Ltd2012

Dendritic Growth Morphologies in Al-Zn Alloys-Part II: Phase-Field Computations

Michel Rappaz, Jonathan Friedli, Paolo Di Napoli

In Part I of this article, the role of the Zn content in the development of solidification microstructures in Al-Zn alloys was investigated experimentally using X-ray tomographic microscopy. The transition region between dendrites found at low Zn content a ...

Springer Verlag2013

Numerical simulation of AM1 microstructure

Charles-André Gandin, Alain Jacot, Paolo Di Napoli, Luc Rougier

A modelling approach is developed for the description of microstructure formation in the industrial AM1 Ni-base superalloy. Solidification and homogenization simulations are first carried out using a microsegregation model, before using the local compositi ...

E D P Sciences2014