Stage Master 2 en fabrication additive - Z3dlab sas - Montmagny (95)

1 poste
stage
Réf. 9764574 - Publié le 19 août 2019
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Domaine de formation

Sciences, technologies (Matériaux, Mécanique, génie mécanique)

Mission

The rapid growth in the aerospace industry gives an impetus for the fast development of new aircraft materials. The main driving force is cost reduction through weight reduction and service life extension of aircraft parts/structures. Light weight design of aircraft frames and engines design with materials of improved mechanical properties can improve fuel efficiency, increase payload, and increase flight range, which directly reduce the aircraft operating cost. Therefore, many researches have been devoted to developing materials with optimized properties to reduce weight, improve damage tolerance, fatigue and corrosion resistance. Ti-based alloys, such as Ti-6Al-4V alloy, B120VCA alloy, and Ti-10V-2Fe-3Al, possess lower density, higher strength than high strength steels at high-temperature. However, during the start and shut-down phase of modern gas turbines the disks and blades are subjected to high mechanical strain cycles imposed by thermal transients. The maximum working temperature of Ti6Al4V alloy was reported around 300°C which limits its use in aeroengines. ZTi-Powder® is a Ti6Al4V reinforced alloy with nano yttria stabilized zirconia and manufactured via additive manufacturing technology [1]. This alloy showed higher mechanical properties compared to unreinforced Ti6Al4V. In addition, the introduction of nanoceramics into a metallic matrix not only effect the mechanical properties but also the thermal properties. Therefore, investigating ZTi-Powder® deformation behavior at higher temperatures is believed to give a valuable information on its uses in aeroengines. Knowing that other titanium alloys have proven a good candidate to replace Ti6Al4V such as IMI 834 which is so far the strongest titanium alloy to be used in aero engines , this is due to its higher strength, fatigue and corrosion resistance at higher temperatures.
The goal of this work is to investigate the effect of nano yttria stabilized zirconia (nYSZ) addition over hot deformation behavior of ti6al4v manufactured via metal 3d printing selective laser melting (SLM) and comparing results with TIMET 834 and conventional Ti6Al4V.

[1] A. Hattal, T. Chauveau, M. Djemai, J.J. Fouchet, B. Bacroix, G. Dirras, Effect of nano-yttria stabilized zirconia addition on the microstructure and mechanical properties of Ti6Al4V parts manufactured by selective laser melting, Materials & Design. 180 (2019) 107909.

Profil

Mécanique des matériaux
Sciences des matériaux
Conception et modélisation mécanique

Niveau(x) d'études

Bac +5 et plus

Date de début de mission

Samedi 1 février 2020

Durée

De 3 à 5 mois / 6 mois

Rémunération

530