Turbine wheel is very critical to a turbocharger, does any one know how does a turbo turbine wheel come into being?

Recently I found a web explains it in a good way:
http://otsturbo.com/how-does-an-ots-...me-into-being/

 

Hey Dylan

Welcome aboard. Nice article Theres some good YT Vids on billet vs cast wheels

Joe

 

i cant remember if holset was working on machine from solid turbines or not. they definitely have machine from solid titanium compressors

 

It is my understanding that TiAl wheels cannot be cast like Inconel wheels can. I believe that Mitsubishi tried this, and the alloy was never quite right. It has to maintain a certain phase, and the only way to cast the material left Ni all over the surface, which in turn lead to unintended premature failure. I think that I remember something about TiAl wheels using additive manufacturing. I even asked about this, but I never got a clear answer. Certain aircraft turbines are made out of the material.

 

We know titanium billet compressor wheel is CNC machined from a solid material, it says casting is also possible, but we never tried.