Method of producing an integrally bladed rotor from a forged disc material and a single crystal blade material with {HEAD ~ the disc material} having {TAIL ~ a softening temperature} which is less than the blade softening temperature including the steps of: 
Method of producing an integrally bladed rotor from a forged disc material and a single crystal blade material with { HEAD ~ the disc material } having { TAIL ~ a softening temperature } which is less than the blade softening temperature including the steps of :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH