Sprayforming optimisation of suferalloy aeroengine components

Abstract

The use of the sprayforming technologies has extended in several automotive applications, with a range of components manufactured from different alloys like tool steels, aluminium, bronze. Recent results of the European funded research project OPTISPRAY Nr. GRD1-2001-40168 are presented here on the application of this process to the manufacture of Aeroengine Components in IN718 and U720 alloys. These components are mainly Low Pressure Turbine casings (and likely others of similar geometries), where the much shorter proposed manufacturing route would mean a significant cost reduction. The process key parameters ruling final results have been investigated and optimized, with the aid of modeling, to finally obtain a product with the appropriate quality to be used in the intended aerospace application. A different previous paper focuses on the spraying process parameters and post-processing routes optimization, performing the metallurgical study of the produced material. Herein, the products coming from these different routes have been assessed through mechanical tests, and the results are presented. All considered facts of technical suitability and economy of the proposed manufacturing route indicate the interest of availability of the process for aeroengine manufacturers.