Residual stresses in Inconel 718 engine disks
1 R&D Department, Aubert&Duval, 75 Boulevard de la libération, BP. 173, 09102 Pamiers Cedex, France
2 R&D Department, Aubert&Duval, Advanced Forming Research Centre, University of Strathclyde, 85 Inchinnan Drive, Inchinnan, Renfrewshire, PA4 9LJ Scotland, UK
3 R&D Department, Aubert&Duval, BP. 1, 63770 Les Ancizes, France
4 Production Engineering Department, 75 Boulevard de la libération, BP. 173, 09102 Pamiers Cedex, France
a Corresponding author: email@example.com
Aubert&Duval has developed a methodology to establish a residual stress model for Inconel 718 engine discs. To validate the thermal, mechanical and metallurgical parts of the model, trials on lab specimens with specific geometry were carried out. These trials allow a better understanding of the residual stress distribution and evolution during different processes (quenching, ageing, machining). A comparison between experimental and numerical results reveals the residual stresses model accuracy. Aubert&Duval has also developed a mechanical properties prediction model. Coupled with the residual stress prediction model, Aubert&Duval can now propose improvements to the process of manufacturing in Inconel 718 engine disks. This model enables Aubert&Duval customers and subcontractors to anticipate distortions issues during machining. It could also be usedt to optimise the engine disk life.
© Owned by the authors, published by EDP Sciences, 2014
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