Description
Overview Of Ti-6Al-4V
Ti-6Al-4V (Grade 5 titanium alloy) is the most widely used alpha-beta titanium alloy, composed of titanium (Ti), aluminum (Al), and vanadium (V). It is renowned for its exceptional strength-to-weight ratio, corrosion resistance, and biocompatibility. As a powder, Ti-6Al-4V is extensively applied in additive manufacturing (e.g., 3D printing), aerospace, and biomedical industries due to its compatibility with processes like laser powder bed fusion (LPBF) and electron beam melting (EBM).
Chemical Composition(wt,-%)
| Element | Al | V | Zr | Mo | Si | Fe |
| Ti-6Al-4V | 5.50-6.75 | 3.50-4.50 | – | – | – | ≤0.30 |
| Element | C | O | N | H | Ti | |
| Ti-6Al-4V | ≤0.08 | ≤0.15 | ≤0.05 | ≤0.015 | Bal | – |
Physical Properties
| Grade | Size | Particle size distribution | Hall flow rate | Bulk
density |
Tap density | ||
| D10(μm) | D50(μm) | D90(μm) | |||||
| Ti-6Al-4V | 15-53μm | ≥15 | 30-40 | ≤60 | ≤38s/50g | ≥2.3g/cm³ | ≥2.7g/cm³ |
Mechanical Properties
| Grade | Tensile strength
(Ob/Mpa) |
Yield strength
(Opo.2/Mpa) |
Elongation at break
(δ5/%) |
| Ti-6Al-4V | ≥1000 | ≥950 | ≥8 |
Heat Treatment Recommendation
| Grade | Recommended HT solution |
| Ti-6Al-4V | 950℃/2H/AC |
Advantages
● High Specific Strength: 30% stronger than steel at half the weight.
● Corrosion Resistance: Excellent performance in chloride and acidic environments.
● Biocompatibility: Non-toxic and compatible with human tissues (ISO 10993-certified).
● Thermal Stability: Retains properties up to 400°C (750°F).
Limitations
● High Cost: Expensive raw materials and processing compared to steel/aluminum.
● Machining Difficulty: Prone to galling and requires specialized tools.
● Oxidation Risk: Susceptible to oxidation above 600°C in non-vacuum AM processes.
Note: Post-processing (e.g., HIP, annealing) is often required to eliminate porosity and enhance mechanical properties in 3D-printed Ti-6Al-4V parts.
Primary Applications
Ti-6Al-4V powder is commonly used in:
● Additive Manufacturing – Selective laser melting to produce lightweight structural parts for aerospace and automotive.
● Metal Injection Molding – To manufacture small, complex net-shape components like fasteners, links, surgical instruments.
● Thermal Spray Coatings – Applied via plasma or HVOF spraying to provide wear/corrosion resistance in marine, oil and gas, biomedical applications.
● Powder Metallurgy – Pressing and sintering to create high-strength parts like compressor and turbine blades.
