Titanium Alloys – Ti10V2Fe3Al Properties and Fabrication

Chemical Formula

Ti10V2Fe3Al

Topics Covered

Mechanical Properties

Fabrication

Background

This near beta alloy was developed primarily for high strength applications in the 1241 MPa (180ksi) UTS range, in order t provide weight savings over steels in airframe forging operations.

The alloy also possesses the best hot die forgability of any commercial titanium alloy and is suitable for near net shape forging applications and isothermal forging.

Ti10V2Fe3Al also offers high strength/toughness combinations and is deep hardenable.

Composition

Table 1. The composition of Ti10V2Fe3Al.

	Content
C	<0.05%
N₂	<0.05%
O₂	<0.13%
Al	2.6-3.4%
Fe	1.6-2.2%
V	9.0-11.0%
H₂	<0.015%%
Ti	Balance

Designations

Other designations for Ti10V2Fe3Al include:

· AMS 4983

· AMS 4984

· AMS 4986

· AMS 4987

· UNS R54610

Key Properties

Physical Properties

Table 2. Typical physical properties for Ti10V2Fe3Al.

Property	Typical Value
Density g/cm³ (lb/ cu in)	4.65 (0.167)
Melting Range °C±15°C (°F)	1649 (3000)
Beta Transus °C±15°C (°F)	796 (1465)
Mean Co-Efficient of Thermal Expansion 20-400°C /°C (68-752°F /°F)	9.7x10^-6 (5.4)

Mechanical Properties

Table 3. Typical mechanical properties for Ti10V2Fe3Al.

Property	Minimum	Typical Value
Tensile Strength MPa (ksi)	1241 (180)	1310 (190)
0.2% Proof Stress MPa (ksi)	1104 (160)	1128 (178)
Hardness Rockwell C		41
Elastic Modulus GPa (msi)	103 (15)

Fabrication

Specific requirements for strength and toughness can be developed by forging and finishing in a wide range of combinations of temperature and section reduction, as well as by selection of heat treatment parameters. Consultation with the alloy supplier is strongly recommended. One example of the manufacturing possibilities is:

· Forging – Rough 871-927°C (1600-1000°F)

· Solution Treating – 752-754°C (1385-1425°F), 1 hr, WQ.

· Ageing – 482-510°C (900-950°F), 8 hrs, AC.

· Weldability - Fair