Digital Repository, CONVEGNO IGF XXII ROMA 2013

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Crack path in a Zn-Cu-Al PE alloy under uniaxial load
Vittorio Di Cocco, Francesco Iacoviello, Luigi Tomassi, A. Rossi, Stefano Natali, Valerio Volpe

Last modified: 2013-06-27


Pseudo-elastic (PE) materials are an important class of metallic alloy which exhibit unique features
with respect to common engineering metals. Because of these unique properties, PEs are able to recover their
original shape after high values of mechanical deformations, by removing the mechanical load (PE). From the
microstructural point of view shape memory and pseudo-elastic effects are due to a reversible solid state
microstructural diffusionless transitions from austenite to martensite, which can be activated by mechanical
and/or thermal loads. Copper-based shape memory alloys are preferred for their good memory properties and
low cost of production.
This paper describes the main crack initiation and its propagation in an tensile test in order to evaluate crack
path and its behaviour at low and at high values of deformation. Both grain boundary chemical properties and
X-ray diffraction will be discussed in order to correlate structural transition involved in an Cu-Zn-Al alloy
characterized by a PE behaviour.

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