Metal-Matrix-Composites for Lighter Weight Designs
6092/SiC/25p Aluminum Metal-Matrix-Composite (Al MMC) is an emerging material for helicopter gearbox bearing liners. Its combination of enhanced strength and Titanium-equivalent stiffness, along with high hardness and moderately low CTE cannot be matched by monolithic aluminum alloys.
6092/SiC/25p is a powder metallurgy Al MMC comprised of AA6092 aluminum and 25 Vol% Silicon Carbide particles. It is available in vacuum-hot-pressed billet, extruded, forged and sheet product forms.
- Titanium matching elastic modulus
- Elevated Yield and Ultimate Tensile Strength
- Excellent wear resistance
TYPICAL AND MINIMUM MECHANICAL PROPERTIES FOR FORGINGS, EXTRUSION AND SHEET
| 6092/SiC/25p-T6 Density= 0.1025 lb/in3 |
F, ty ksi |
F, tu ksi |
elong. % |
|
|---|---|---|---|---|
| Die Forging, 10in | Typical L | 62 | 72 | 4 |
| Seamless Tube Extrusion, 11in | Typical L | 57 | 69 | 4 |
| Sheet, 0.100in | Typical L, LT | 62 | 71 | 4 |
| All Forms | Minimum L | 50 | 60 | 3 |
| Notes: 1) Young's Modulus is typically 16.2 msi. 2) Coefficient-of-Thermal-Expansion (CTE) is typically 8.5 ppm/°F. 3) Typical Rockwell B scale hardness is 83-85. |
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TYPICAL AND MINIMUM MECHANICAL PROPERTIES FOR FORGINGS, EXTRUSION AND SHEET
| 6092/SiC/25p-T6 Density= 2.84 g/cm3 |
F, ty MPa |
F, tu MPa |
elong. % |
|
|---|---|---|---|---|
| Die Forging, 250mm | Typical L | 430 | 495 | 4 |
| Seamless Tube Extrusion, 279mm | Typical L | 391 | 477 | 4 |
| Sheet, 2.5mm | Typical L, LT | 427 | 488 | 4 |
| All Forms | Minimum L | 345 | 414 | 3 |
| Notes: 1) Young's Modulus is typically 112 GPa. 2) Coefficient-of-Thermal-Expansion (CTE) is typically 15.3 ppm/°C. 3) Typical Rockwell B scale hardness is 83-85. |
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MATRIX ALLOY CHEMICAL COMPOSITION FOR 6092/SiC/25p
| 6092/SiC/25p Density= 0.1025 lb/in3 (2.84 g/cm3) |
||||||||||||
| Al | Cu | Mg | Si | Fe | Zn | Ti | Ni | Cr | Mn | O | Other, Each |
Others, Total |
| Bal | 0.7- 1.0 |
0.8- 1.2 |
0.40- 0.8 |
0.30 max |
0.25 max |
0.15 max |
-- | 0.15 max |
0.15 max |
0.050- 0.50 |
0.05 max |
0.15 max |
| Notes: 1) Compositional limits shown as weight percent (wt%). 2) Silicon carbide particle content shall be maintained at 25 ±1.0 Vol%. |
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Case Studies
Fielded Applications
DWA-USA specializes in new aluminum-based powder metallurgy materials and applications development. We serve our customers throughout the entire development cycle, whether it be an upgrade to an existing design or starting from the ground up. Our track record for transitioning prototyping efforts to real world serial production is unparalleled.
View our Case StudiesDensity Adjusted Properties of Aluminum MMCs Compared to Steel, Titanium and Aluminum
One of the clear advantages of Al MMCs compared to conventional metallic materials is greatly enhanced strength and stiffness. These property gains are achieved without impacting material density, so the specific properties of Al MMC are dramatically increased. Al MMCs are also isotropic composite materials. Their design space is not dependent on reinforcement orientation.
DWA Aluminum Composites
Aluminum Metal-Matrix-Composites Manufacturing
The Al MMC manufacturing process can be divided into three elements- primary processing, secondary processing and finishing. Unlike other composite materials, after primary processing of the billet, Al MMCs offer a high level of “fit, form and function” when inserted into the industrial manufacturing stream, making use of conventional facilities and equipment.
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