Development of Techniques for Gamma Ti-Al Production 2013-36-0392
Gamma Ti-Al (γ Ti-Al) has excellent mechanical properties and oxidation/corrosion resistance at elevated temperatures (above 700°C), which makes it a possible replacement for traditional Ni based superalloy components in aircraft turbine engines and in orbital platform vehicles. The alloy design and efficient routes of TiAl processing are important technological challenges. In this work, samples of Ti-48Al-2Cr-2Nb (at.%) were produced by powder metallurgy processes. Using powder metallurgy, samples were prepared from elemental and pre-alloyed powders mixed for 2 h, followed by cold uniaxial and isostatic pressing and sintered between 1100°C up to 1400°C, for 1 h, under vacuum. After metallographic preparation, samples were characterized by SEM (Scanning Electron Microscopy), X-ray diffraction (XRD), density analyses and Vickers microhardness measurements. The results indicated the presence of Kirkendall porosity in samples prepared from blended elemental technique and the tendency of a full lamellar α2 + γ microstructure in samples sintered at high temperatures using Ti-Al pre-alloyed powders.
Citation: Henriques, V., de Oliveira, J., Diniz, E., Dutra, A. et al., "Development of Techniques for Gamma Ti-Al Production," SAE Technical Paper 2013-36-0392, 2013, https://doi.org/10.4271/2013-36-0392. Download Citation
Author(s):
Vinicius André Rodrigues Henriques, José Luis de Oliveira, Edevaldo Faria Diniz, Ana Carolina Silva Machado Dutra, Eduardo Tavares Galvani
Affiliated:
Instituto de Aeronáutica e Espaço IAE/DCTA, ETEP Faculdades
Pages: 7
Event:
22nd SAE Brasil International Congress and Display
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Powder metallurgy
Production
Microscopy
Aircraft
Corrosion
Drag
Alloys
Vacuum
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »