Descrizione del progetto
Materiali in alluminuro di titanio per pale di turbina in fase di collaudo
Grazie al peso ridotto e alle buone proprietà meccaniche e di ossidazione, l’alluminuro di titanio (TiAl) potrebbe sostituire le superleghe a base di nichel nelle turbine degli aeromobili. Il progetto PANTHER, finanziato dall’UE, approfondirà la resistenza delle pale di turbina in TiAl in presenza di elevate velocità di deformazione, alte temperature e diversi livelli di triassialità della tensione. Un approccio combinato di simulazioni numeriche ed esperimenti contribuirà a creare un modello dinamico transitorio affidabile per prevedere il comportamento e il cedimento del materiale. La metodologia proposta potrebbe essere utilizzata anche per caratterizzare la dinamica di altri materiali in ambienti ad alta temperatura, come ad esempio nei motori delle automobili.
Obiettivo
The work presented in this proposal will help the topic leader to evaluate the ability of an innovating TiAl material to replace nickel-based super-alloys for low-pressure turbine application. The PANTHER project will focus on the investigation of the resistance of TiAl alloy under high strain rate, high temperature and different stress triaxiality levels. A combined approach between numerical simulations and original experiments will help creating a reliable transient dynamics material model for behaviour and failure. An upstream methodology will be applied, aiming at testing the material from a microscopic scale to a structure scale. The work will begin by numerical simulation of a blade-off in order to evaluate the important parameters to take into consideration in the model. The results of this preliminary study will drive the experimental conditions for the material testing on Split Hopkinson Bar apparatus. A first couple of parameters will be fitted thanks to this first test campaign. The study will go on with simplified impact testing (two impact configuration) with highly instrumented targets. These tests will reveal the behaviour and failure mode of the TiAl under dynamic conditions. Numerical simulations of these experiments will be performed and material model parameters will be adjusted to correlate simulation results to experimental ones. The goal of the last testing campaign (three impact configurations) is to reproduce the real events that can occur during the life operation of an engine turbine. A last batch of numerical simulation will allow to confirm the ability of the established material model to accurately predict such complex events. The call is in THIOT’s core business and strategy. With the PANTHER project, THIOT is submitting an innovating proposal that will maintain the European industry at the cutting edge of the turbine design.
Campo scientifico
Parole chiave
Programma(i)
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Meccanismo di finanziamento
RIA - Research and Innovation actionCoordinatore
46130 Puybrun
Francia
L’organizzazione si è definita una PMI (piccola e media impresa) al momento della firma dell’accordo di sovvenzione.