Hi Neal!
Did you hear about the recently rediscovered element aptly named:
"Administratium"?
If you want the description, I'll e-mail it to you!!!
APM, Welding in the normal sense will not work!!! Joining via a method of bonding like JW suggested will work... Explosion welding will fuse the dissimilar metals together but, then again - you're limited by the application and the process so, joining via BONDING is the way to go!!!
Respectfully,
SSBN727 Run Silent... Run Deep!!!