Aug 9 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Annealing
Aging
Forging
Hot Working
Cold Working
Applications
Introduction
Grade Ti 10V 2Fe 3Al alloy is a near-beta alloy that was mainly developed to suit airframe forging applications. This alloy has unique combination of excellent hot-die forgeability and excellent high strength toughness and deep hardenabilty.
The following sections will discuss in detail about grade Ti 10V 2Fe 3Al alloy.
Chemical Composition
The chemical composition of grade Ti 10V 2Fe 3Al alloy is outlined in the following table.
|
Element |
Content (%) |
|
Titanium, Ti |
82.8 - 86.8 |
|
Vanadium, V |
9-11 |
|
Aluminum, Al |
2.6 - 3.4 |
|
Iron, Fe |
1.6 - 2.2 |
|
Oxygen, O |
≤ 0.13 |
|
Carbon, C |
≤ 0.050 |
|
Nitrogen, N |
≤ 0.050 |
|
Hydrogen, H |
≤ 0.015 |
|
Other, each |
≤ 0.10 |
|
Other, total |
≤ 0.30 |
Physical Properties
The physical properties of grade Ti 10V 2Fe 3Al alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
4.65 g/cm3 |
0.168 lb/in3 |
Mechanical Properties
The following table shows mechanical properties of grade Ti 10V 2Fe 3Al alloy.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
970 MPa |
141000 psi |
|
Yield strength |
900 MPa |
131000 psi |
|
Elastic modulus |
110 GPa |
16000 ksi |
|
Shear modulus |
41 GPa |
5950 ksi |
|
Elongation at break |
9% |
9% |
|
Hardness, Brinell |
304 |
304 |
|
Hardness, Knoop |
330 |
330 |
|
Hardness, Rockwell C |
32 |
32 |
|
Hardness, Vickers |
318 |
318 |
Thermal Properties
The thermal properties of grade Ti 10V 2Fe 3Al are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@0.000-100°C/32-212°F) |
9.70 µm/m°C |
5.39 µin/in°F |
|
Thermal conductivity |
7.80 W/mK |
54.1 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to grade Ti 10V 2Fe 3Al alloy are as follows:
-
AMS 4983
-
AMS 4984
-
AMS 4986
-
AMS 4987
Fabrication and Heat Treatment
Machinability
Grade Ti 10V 2Fe 3Al alloy is hard to machine but can be successfully done using slow speeds, high coolant flow, and high feed rates. Tooling should be performed using tungsten carbide designations C1-C4 or cobalt type high speed tools.
Forming
Grade Ti 10V 2Fe 3Al alloy can be hot or cold formed.
Welding
Weldability of grade Ti 10V 2Fe 3Al alloy is rated as fair.
Annealing
Annealing of this material (sections up to 1/2") can be performed by holding it at 815°C (1500°F) for 30 min.
Aging
Aging of grade Ti 10V 2Fe 3Al alloy can be performed at 482-510°C (900-950°F) for 8 h and then air cooled.
Forging
Forging can be performed and completed at 871-927°C (1600-1700°F).
Hot Working
Hot working enhances the ductility of the material.
Cold Working
Cold working features of this material is same as that of a medium tempered austenitic stainless steel. Post-work annealing is recommended to re-attain useful performance properties.
Applications
Grade Ti 10V 2Fe 3Al alloy is mainly used in near-net shape forging, and in high strength airframe components.