GTD-111 directionally solidified nickel based superalloy was repaired using pulsed Nd:YAG laser powder injection deposition. A test matrix was created and tested to link deposit and defect formation to process parameters. Using a pulsed laser showed less formation of defects and better metallurgical properties then similar repair processes done using a continuous wave laser. Epitaxial solidification of the deposit was achieved in the <100> crystallographic direction. The grain size was uniform throughout multiple layers of deposit and appeared to be of cellular dendritic morphology. The heat-affected zone was nearly undetectable by microstructure: there was no change in the morphology of the gamma prime precipitates in the HAZ region close to the fusion boundary. The cusp angle of the adjacent deposit passes was less then 30 degrees. This shallow and wide profile of the deposit did not allow for stray grain formation. The cracking tendency was kept to a minimum in the deposits without preheating or post heating. Almost all of the cracking was associated with grain boundaries of the base material, possibly through a carbide liquation mechanism. The porosity associated with the process produced smaller porosities in the deposit then were found in the base material resulting form the casting process. Unmelted carbides from the base material were found in the deposit matrix even after multiple melting cycles. A coupled field thermal and structural analysis of pulsed laser heating was conducted to quantitatively understand the process factors (e.g., temperature, and stress/strain fields) that may have contributed to the weld deposit shape and crack formation.