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Nicole Seumangal

Stress Corrosion Cracking (SCC) is one of the leading damage mechanisms on power generation low pressure (LP) turbine blades. The heat treatment condition of the LP turbine blades has an effect on the stress corrosion cracking (SCC) properties of the steel and has been identified as the primary cause of premature cracking/failure of LP turbine blades in power plants.

The objective of the research is to investigate the influence of the tempering temperature on the microstructure, mechanical properties and stress corrosion cracking properties of 12% chromium FV566 stainless steel. By being able to identify turbine blades that are at risk of developing SCC cracks due to poor material properties, turbine blade failures can be prevented in cases where the dominant failure mechanism is SCC.