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Siksvan said..
Tensile Strength:
T6 Aluminum Alloy: Aluminum 6061-T6, which is one of the common T6 series alloys, has a tensile strength around 310 MPa. The T6 designation refers to a specific heat treatment process that enhances strength, but even with this treatment, aluminum's tensile strength is considerably lower than that of carbon fiber.
Carbon Fiber: Carbon fiber composites can achieve tensile strengths up to 6,000 MPa, which is significantly higher than aluminum alloys. This strength comes from the material's unique crystalline structure where carbon atoms are aligned to provide high resistance to tensile forces.
Strength-to-Weight Ratio:
T6 Aluminum Alloy: While aluminum is relatively light for a metal, its strength-to-weight ratio is not as high as carbon fiber. Aluminum has a density of about 2.7 g/cm?, but its strength does not match its weight efficiency compared to carbon fiber.
Carbon Fiber: Carbon fiber has a much lower density, around 1.6 g/cm? (for typical composites), which, combined with its high tensile strength, leads to an exceptional strength-to-weight ratio. This makes carbon fiber ideal for applications where weight reduction is crucial without sacrificing structural integrity.
Stiffness (Modulus of Elasticity):
T6 Aluminum Alloy: The modulus of elasticity for aluminum 6061-T6 is around 69-79 GPa, indicating good stiffness for many applications but still less than carbon fiber.
Carbon Fiber: Depending on the specific composition and manufacturing process, carbon fiber can have a modulus of elasticity ranging from 150 to 760 GPa, making it much stiffer than aluminum for the same thickness.
Behavior Under Load:
T6 Aluminum Alloy: Aluminum tends to deform plastically before failure, allowing some warning before structural failure. It's also more ductile compared to carbon fiber.
Carbon Fiber: Carbon fiber is known for its brittleness. While it is incredibly strong, it can fail suddenly under excessive load without much deformation, which is a consideration in safety-critical applications.
Corrosion Resistance:
T6 Aluminum Alloy: Aluminum naturally forms an oxide layer that provides corrosion resistance, but this can be compromised in certain environments.
Carbon Fiber: Carbon fiber is inherently resistant to corrosion, making it suitable for harsh environments where aluminum might degrade over time.
This has been done to death other threads. Carbon is really really strong in one direction. Aluminum is equally strong in all directions making it better for the dynamic loads of a fuse. Having ridden identical carbon and aluminum fuses back to back on my north setup the difference is HUGE. If north didn't make the aluminum fuse I'd be riding a different brand.