Metallurgy of gas turbine blades with integral shroud and its influence on blades performance
DOI:
https://doi.org/10.3989/revmetalm.1999.v35.i1.604Keywords:
Gas turbine blades, Casting methods of blades, Blades, Microstructure, Equiaxed and columnar grainsAbstract
The influence of the microstructure of the gas turbine blades with integral shroud on the blades performance is presented. The analysis of the solidification process of the gas turbine blades during conventionally casting process (equiaxed grains) with all elements which has influence on the mode of its solidification and variation of the microstructure is carried out. Also, the evaluation of the failure of the gas turbine blade is presented. A detailed analysis of the blade tip shroud microstructure (presence of the equiaxed and columnar grains) and its influence on the failure initiation and propagation is carried out. Finally, conclusions and some necessary improvements of the blades casting process to prevent blades failures are presented.
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