Abstract
In order to reduce costs and increase the operating temperatures in aero-turboengines and space propulsion systems, net-shape or near net-shape production processes have been developed for static parts through HIPing (Hot Isostatic Pressing) of nickel base superalloys prealloyed powders. The presented results hereafter are related to the manufacturing processes and the mechanical properties (tensile, creep and LCF) characterisation. The effects of net shape surfaces and of surface conditioning have been investigated too. Examples of actual parts (CFM56 turbine casing and Vulcain rocket engine gas generator) illustrate the presentation. This study has confirmed the interest of this production route and future potential for development.
Publisher
Trans Tech Publications, Ltd.
Reference4 articles.
1. G. Raisson: Evolution of PM Nickel base Superalloys Process and Products. Proceedings of Euro PM2007, Toulouse (France) October 15-17th 2007. EPMA Editor.
2. R. Baccino et al.: High performance and High Complexity Net-Shape Parts for Gas Turbine: The ISOPREC® Powder Metallurgy Process. Research and Development in net-shape Manufacturing - Birmingham UK- March 24-26th, (1999).
3. G. Raisson: Tailoring of Nickel- base Superalloys by HIPing. Proceedings of the 2005 International Conference on Hot Isostatic Pressing. Paris- May 22-25th 2005. SF2M Editor.
4. D. Guichard et al.: Le procédé de mise en forme Isoprec®. Journal de Physique IV, 10, PR4 (2000), p.39.
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