Subject: Exhaust system materials
From: ACRE
Date: 1/3/2004, 8:25 AM



Ok Guys here goes, With all this exhaust talk nobody has mentioned
titainium.
Before everyone goes loopy on me, let me mention that I have an all
Ti
exhaust on my gsxr Suzuki. While this exhaust was far from cheap,
(retail 1500 bucks,) there are some real advantages. First; Ti
doesn't
corrode. It is similar to 300 series stainless in that reguard.
Second;
Ti has high temperature resistance, it's actually stronger at temp.
Lastly;
it is so light IT IS AMAZING. My entire 4 into 1 exhaust system
including
the muffler weighs 7 pounds. Welds similar to stainless. The exhaust
on
my bike is at least as complex as the Racing Beat turbo one if not
more
so. seems like we could make a good tangential or VAM out of it for
less than the inconel systems. Tubing is available. What do you guys
think? Bill Jepson

Bill,
So what would be the cost and weight of a Vam muffler in Titanium as
compared to the Stainless Steel or Inconel (i.e. a rough cost benefit
analysis).

A question on the Ti - if it gets stronger with heat does it act like
6064
Al whereby the Al gets harder as it is artificially ages with heat, or
is it
a cyclic thing and if cyclic (ie hard then soft), would that induce
cracking
at welds etc.

George (down under)

Paul

Dean wrote:
IIRC, there was very extensive use of titanium in the aft fuselage of the
McD  F-4 aircraft.  The "shingles", for lack of the proper term, and even
the aft part of the keel were all Ti.

Dean

 
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