Description
Overview Of Ti-6Al-4V ELI
Ti-6Al-4V ELI is a titanium alloy known for its exceptional mechanical properties and biocompatibility. It is a variant of Ti-6Al-4V alloy, specifically developed for critical applications in industries such as aerospace, medical, automotive, and sports equipment manufacturing. Ti-6Al-4V ELI exhibits enhanced purity and reduced interstitial elements, making it highly desirable for various advanced applications.
Compared to other titanium alloys, Ti-6Al-4V ELI offers an excellent combination of high strength, low weight, outstanding corrosion resistance, and biocompatibility. The ELI grade ensures maximum ductility and toughness.
Key properties and characteristics of Ti-6Al-4V ELI powder:
Powder Chemical Composition (wt,-%)
| Element | Range |
| Aluminum (Al) | 5.5 – 6.5 |
| Vanadium (V) | 3.5 – 4.5 |
| Iron (Fe) | ≤ 0.25 |
| Oxygen (O) | ≤ 0.13 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.05 |
| Hydrogen (H) | ≤ 0.012 |
| Titanium (Ti) | Balance |
Physical Properties
| Property | Value | Conditions |
| Density | 4.43 g/cm³ | Typical for titanium alloys. |
| Melting Point | 1604–1660°C (2919–3020°F) | Broad range due to alloy phases. |
| Thermal Conductivity | ~6.7 W/m·K | At room temperature. |
| Electrical Conductivity | ~0.5% IACS | Poor conductor compared to copper. |
| Coefficient of Thermal Expansion | 8.6 × 10⁻⁶ /°C | 20–100°C range. |
| Elastic Modulus | ~114 GPa | Stiffness comparable to other Ti alloys. |
Mechanical Properties
| Property | Typical Value | Test Conditions |
| Ultimate Tensile Strength | ≥ 795 MPa (115 ksi) | Annealed condition, room temperature. |
| Yield Strength (0.2% offset) | ≥ 725 MPa (105 ksi) | Annealed condition. |
| Elongation at Break | ≥ 10% | In 50 mm gauge length. |
| Reduction of Area | ≥ 20% | Measures ductility. |
| Fracture Toughness (K<sub>IC</sub>) | ~70 MPa√m | Enhanced due to ELI’s low interstitial elements. |
| Fatigue Strength | ~500 MPa (10⁷ cycles) | Rotating bending fatigue, polished specimen. |
| Hardness | ~36 HRC | Rockwell C scale. |
Ti-6Al-4V ELI Powder Properties
Ti-6Al-4V ELI is suitable for additive manufacturing, metal injection molding, and other powder metallurgy applications. Its fine powders enable complex geometries and thin walls in 3D printed or sintered parts.
Advantages
Enhanced Toughness: Lower oxygen and nitrogen reduce brittleness, improving fracture resistance.
Superior Cryogenic Performance: Retains ductility at extremely low temperatures (e.g., liquid hydrogen tanks).
Biocompatibility: Widely used in medical implants due to corrosion resistance and biocompatibility.
Primary Applications
| Area | Applications |
| Aerospace | Aircraft structures, engine components, space launch systems |
| Implants | Orthopedic implants, dental implants, maxillofacial implants |
| Automotive | Motorsports components, turbocharger wheels |
| Industrial | Marine hardware, offshore drilling parts, valves, pumps |
| Energy | Wellhead components, downhole tools, pipelines |
| Defense | Ballistic armor, weapon components, protective gear |
