Sure, only with the surface hardened to RC55.
Royce

7075T6 is the hardest aluminum around and it is Brinell
150. RC 55 is off the Brinell scale with the standard 10 mm ball

and

is Brinell 546 with the Hultgren ball whatever that is.

http://www.cknife.com/compare.htm

Paul Lamar

How Right you are Paul. I wonder what magic aluminum this is! Hard

anodize is the toughest

surface, and it stinks as a running surface.  7075 also doesn't take

coatings or anodize well.

Bill Jepson

Why would you think it stinks as a running surface Bill?
And why would you say that 7075 doesn't anodize well?  It is hard

anodized in numerious applications

in the aerospace and industrial applications for it's excellent abrasion

abilities when hard

anodized.
Royce

Mark Wrathall wrote:

Hi Royce. Glad you are still answering questions on this subject. We all
want the 6.5B project to be a huge success, but talk of anodized Al as a
poorly lubricated, heated wear surface raises a lot of alarm bells.

Could you please post pictures of your patterns and parts you displayed at
SnF for those who couldn't make it.

7075 is not a castable alloy.

Remember that the wankel's first 20 years were hindered by material
compatiblity issues until Mazda finally got the right mix of seal and
running surfaces, They had a team of very good engineers working this issue
with the support of test cells and a prototyping budget. They came up with
nitrided cast steel/iron as a side housing wear surface. What will your
prototype engine cost you with the anodized side housings? If you can afford
it (and we can see that you are convinced) we would love to see the result
of an FAA Part ?? type 50 hour endurance test. Please don't fly this
configuration without stressing it on a test bed and then doing a teardown.

Regards,
Mark

 
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