Material advise needed
Material advise needed
(OP)
Hi,
I'm in the process of building a heavily modified, somewhat experimental, motorcycle. (two stroke)
I have the machining know how but am a bit confused by the material choices open to me.
I need to know what would be the best type of billet aluminium for the following applications & what heat treatments, etc, if any, these would require;
1) top & bottom fork yokes & fork bottoms / caliper mounts.
2) brake calipers (would the bores need special treatment?)
3) crank cases
4) barrels (I intend to have these nicasil plated)
I have looked into it & noted the materials a few aftermarket companies are using but don't know if these are best or how they have been treated.
Hope you guys can help.
Thanks.
I'm in the process of building a heavily modified, somewhat experimental, motorcycle. (two stroke)
I have the machining know how but am a bit confused by the material choices open to me.
I need to know what would be the best type of billet aluminium for the following applications & what heat treatments, etc, if any, these would require;
1) top & bottom fork yokes & fork bottoms / caliper mounts.
2) brake calipers (would the bores need special treatment?)
3) crank cases
4) barrels (I intend to have these nicasil plated)
I have looked into it & noted the materials a few aftermarket companies are using but don't know if these are best or how they have been treated.
Hope you guys can help.
Thanks.





RE: Material advise needed
RE: Material advise needed
If not, any ideas for further reasearch?
Cheers.
RE: Material advise needed
RE: Material advise needed
RE: Material advise needed
KR1,
I'd like to hear more details of your project.
RE: Material advise needed
RE: Material advise needed
RT
RE: Material advise needed
would stress relieving heat treatment
not eliminate most of these problems though?
Anyone know anything about H30? I've noticed
a few companies using it, is it any better?
RE: Material advise needed
I understand that heat treating 7075 to a T7 type temper may alleviate the tendancy for stress corrosion cracking. I don't know of the effect on the other properties though. Try contacting one of the big aluminum producers or posting in one of the metallurgy forums for an application recommendation from a metallurgist. They have a lot of information that doesn't show up on the typical data sheet.
RT
RE: Material advise needed
RE: Material advise needed
I appreciate that there is never a 100% ideal material for any application & I really appreciate your input, so I've decided to re define the question a bit, if that's OK with you guys?:
What type of billet aluminium would be best suited to machining into motorcycle yokes, bearing in mind;
-They are a one off, being made in a home workshop.
-They only need to perform as well as standard japanese race rep yokes, although better (ie World Superbike sort of quality) would be nice.
-I could get them heat treated, annodised, etc if necessary.
-It would be easier not to have to worry about grain direction as I'm still confused by it;
If you were facing the bike from the front, looking straight at the yokes, should the grain run left to right, up to down, or front to back?
Cheers for sticking with this one fellas.