locally heating the blade cavity/disk protrusion to an elevated temperature is intermediate between {TAIL ~ the blade and disc material softening temperatures} causing {HEAD ~ the protrusion} to deform against the stronger blade cavity 
locally heating the blade cavity / disk protrusion to an elevated temperature is intermediate between { TAIL ~ the blade and disc material softening temperatures } causing { HEAD ~ the protrusion } to deform against the stronger blade cavity
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH