Several fusion repair processes such as laser cladding, laser welding and gas tungsten arc welding have been taken into consideration for repairing IN738 precipitation hardened Ni-based superalloy material. Effect of heat input on weld cracking susceptibility has been studied to obtain optimum condition for crack-free welds. Variations in cracking susceptibility as a function of welding heat input is discussed with reference to metallurgical characteristics of the welds. [S0742-4795(00)02003-2]

Issue Section:
Gas Turbines: Manufacturing, Materials, and Metallurgy
Keywords:
superalloys, nickel alloys, precipitation hardening, cracks, welding, gas turbines, manufacture, metallurgy, failure (mechanical)
Topics:
Fracture (Materials), Heat, Lasers, Maintenance, Precipitation hardening, Superalloys, Welding, Cladding systems (Building), Laser welding, Cracking (Materials), Fracture (Process), Gas tungsten arc welding
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Copyright © 2000
 by ASME
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