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