PROCESS DEVELOPMENT MICROSTRUCTURE MECHANICAL PROPERTY EVALUATIONOF A DUAL MICROSTRUCTURE HEAT TREATED ADVANCED NICKEL DISC ALLOY

摘要

This paper summarises Rolls-Royce’s efforts in developing aproduction capable and industrially robust process for theproduction of dual-microstructure components. This has beenpossible through the use of process modeling, full-scale validationtrials, detailed microstructural assessment through a variety ofdestructive and non-destructive methods and mechanical propertyevaluation. This paper reports the fundamental underlyingrelationships between thermal history and microstructuralevolution and how these directly influence mechanical properties.This work has enabled a deeper understanding of the opportunitiesand difficulties faced in the application of this technique forproducing dual microstructures, and how the technique can bescaled up from the research laboratory to full production capacity.