| to steel regardless of the technique. Even E-beam or laser will do no good... aluminum and iron alloy to form an incredibly brittle intermetallic. With a high enough heat flux you MAY get a stable weld pool, but it will not make it through cooling. Small amounts of dissolved iron in aluminum castings have been known to cause VIOLENT spalling and cracking while cooling. That being said brazing is far more versatile. I have formulated braze compounds to join titanium and steel for a lightweight exhaust header. It works best when the braze filler is soft so that differences in CTE and thermal stresses don't result in cracking. Even better is to use a braze alloy that has a melting point no more than twice the operating temperature of the assembly. (Kelvin scale) That allows moderate bulk diffusion for actual healing of any cold working that develops as a result of thermal cycling. If I have some time, I will take a deeper look for you.
 
While getting tires mounted for Zcon, I had this doozy of a conversation with the mechanic... Tireguy: [looking at emblem] Is this a Twin Turbo?
Me: Well, yea.
Tireguy: Awesome! How much boost do you run?
Me: 14-15 ish.
Tireguy: Cool. On both? ROFLMFAO "...people often mistake charisma for integrity. Sure, he's a nice guy, but that doesn't necessarily make him honest (or dishonest). They are independent variables." -Kenny |
