Titanium Alloys - Ti8Al1Mo1V

Chemical Formula

Ti8Al1Mo1V

Background

This near-alpha alloy was designed primarily for creep resistance up to 430°C (805°F). As such it has been used in aeroengine applications such as forged fan or compressor blades. The Ti-8-1-1 alloy has the highest tensile modulus and lowest density of any commercial titanium alloy.

Composition

Table 1. The composition of Ti8Al1Mo1V.

Designations

Other designations for Ti5Al2.5Sn include:

•         AMS 4915

•         AMS 4916

•         AMS 4972

•         AMS 4973

•         MIL –T-9046

•         MIL –T-9047

•         UNS R54810

Key Properties

Physical Properties

Table 2. Typical physical properties for T Ti8Al1Mo1V.

Mechanical Properties

Table 3. Typical mechanical properties for T Ti8Al1Mo1V.

Fabrication

•         Weldability – Fair

•         Forging – Rough 1010-1038°C (1850-1900°F), finish 1010°C (1850°F)

•         Annealing – Single 788°C (1450°F), 8hr, FC, Duplex – single and 788°C (1450°F), 1hr, AC

•         Stress Relief Annealing – Bar and forgings – 900 or 1010°C (1650-1850°F), 1hr, WQ or AC and 593°C (1110°F), 8hr, AC, 593-649°C (1100-1200°F), 1hr, AC.

Applications

As mentioned previously, this alloy is used in aeroengines for components such as fan or compressor blades due to its creep resistant properties.

Source: Titanium Information Group.

For more information on this source please visit Titanium Information Group.