Patent ID: 6103402
Filing Date: 2000-08-15
Classification: B23K,B23P,C23C,C30B,F01D,F05D,Y10T

Abstract:
A single crystal metallic article made with the use of an energy source, the method comprising melting a filler material into a single crystal metallic substrate having a single crystal structure under conditions chosen to eliminate cracking, namely low power density between about 10 watts/cm.sup.2 and about 10.sup.4 watts/cm.sup.2, and at a relatively large diameter between about 0.1 inches and about 4 inches, for an extended length of time between about 0.1 seconds and about 1000 seconds to produce a molten pool with a low aspect ratio, wherein the single crystal structure of the substrate is continued throughout the article to produce a crack free article having a dendrite spacing between about 20 microns and about 180 microns.