SiC
Additions to the Aluminum Alloy |
- The baseline aluminum alloy for this application is C 355
with a T6 temper.
(The C355 alloy has a
compositon of 4.5%-5.5% Si, 1.0%-1.5% Cu, and 0.40%-0.60% Mg)
- Silicon carbide particulate can be added to aluminum alloy (A
359) at 10vol% and 20vol% levels.
Alloy |
|
C355 -T6 |
A
359 with
10% SiC |
A
359 with
20% SiC |
| Performance |
Target |
|
|
|
| Elastic Modulus (MSI) |
>12.5 |
10.2 |
12.5 |
14.3 |
| Ultimate Tensile
Strength (ksI) |
>40 |
35 |
49 |
50 |
| Tensile Yield Strength
(ksI) |
>30 |
25 |
44 |
47 |
| Harness (Rockwell HRB) |
>55 |
80 |
73 |
77 |
Density (lb/in3) |
NA |
0.0980 |
0.0979 |
0.0999 |
| Castability |
|
|
|
|
Relative Fluidity
(compared to C355) |
= or
>85% |
100% |
93% |
85% |
|
| The table above lists the performance and castability properties
of 10% and 20% silicon carbide aluminum composite alloys, compared to C355 alloy |
|
