Browse Publications Technical Papers 2011-36-0042
2011-10-04

Gamma Ti-Al Alloy Production for Aerospace Applications 2011-36-0042

Gamma-TiAl alloys are potential replacements for nickel alloys and conventional titanium alloys in hot sections of turbine engines, as well as in orbital platform vehicles. The combination of high specific stiffness and good oxidation resistance at intermediate temperatures can provide significant weight savings. However, they have a limited plasticity at room temperature and the tendency to brittle fracture. Powder metallurgy is a near net shape process that allows the parts production with complex geometry at low costs. An improved plasticity of the Ti-Al alloys is received by adding alloying elements and by microstructure modification. An alloy of two-phase structure Ti-48Al-2Cr-2Nb (at.%) was investigated using the blended elemental technique. Samples were produced by mixing of initial metallic powders followed by uniaxial and cold isostatic pressing with subsequent densification by sintering between 1100-1400°C, in vacuum. It was shown that the samples presented a two-phase structure consisting of lamellar colonies of alternating layers of gamma and alpha-2 phase, with high porosity.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Techniques for Ti-6Al-4V Production by Powder Metallurgy

2011-36-0040

View Details

TECHNICAL PAPER

Usage of Titanium Alloys in Airframes: Current Situation and Future

2011-36-0248

View Details

TECHNICAL PAPER

Effect of Concentration of Total Metal on Quality of Zn-Ni Alloy Electrodeposits for Automotives

2002-01-1288

View Details

X