- High-Strength Aluminum Alloys: Aluminum alloys, such as 2024-T3 or 7075-T6, are often used in helicopter wheel hubs because of their high strength-to-weight ratio, good fatigue resistance, and corrosion resistance. These alloys are heat-treated to achieve desired properties and are suitable for most light and medium-weight helicopters.
- Steel Alloys: Steel alloys, like 4130 or 4340, are selected for helicopter wheel hubs that require higher strength, durability, and tolerance for heavy loads. These steel alloys offer excellent fatigue strength, wear resistance, and are typically used in hubs designed for heavy-lift or military helicopters.
- Titanium Alloys: Titanium alloys, such as Ti-6Al-4V, are sometimes used for helicopter wheel hubs when weight reduction and exceptional strength are crucial. Titanium alloys provide high-strength, excellent fatigue life, corrosion resistance, and a high-temperature tolerance. However, they are more expensive and require specialized manufacturing techniques.
- Composite Materials: In recent years, composite materials have gained attention for helicopter wheel hubs. Composites made from carbon fiber, fiberglass, or other high-strength fibers offer a combination of lightweight, durability, and the ability to withstand extreme conditions. These materials can be combined with metal components for optimal performance.
The choice of material depends on factors like the helicopter's weight, design requirements, flight conditions, and payload capacity. Helicopter wheel hubs must meet strict safety standards and undergo rigorous testing to ensure they can withstand the demanding and dynamic environments they operate in.
