Throughout the past decade a number of new powder metallurgy processes have appeared which offer considerable promise for superior aero-engine combustor, blade and disc alloys. Furthermore, several features of these processes can be exploited for improved material utilisation such that total manufacutring costs are contained, to combat steep increases in basic alloying element prices. The processes include gas atomisation of superalloy powder for critical rotating parts, rotating electrode atomisation for titanium powder in similar components, controlled thermo-mechanical processing of attrited powders to produce O.D.S. superalloy sheet and airfoil parts; and finally plasma sprayed gas atomised powder for advanced hot-section overlay and thermal barrier coatings. Considerable alloy and process development work has already been undertaken on all these systems by aero-engine material suppliers and advantages accruing in terms of superior properties and/or lower processing costs demonstrated at laboratory level and for some cases also in engine service. (Wassmann)
Powder metallurgical innovations for improved hot section alloys in aero-engine applications
Pulvermetallurgische Neuerungen fuer Heissbereichslegierungen fuer Flugzeugtriebwerke
Powder Metallurgy Group Meeting. The Metals Soc. ; Okt ; 1-26
1980
26 Seiten, 15 Bilder, 3 Tabellen, 47 Quellen
Aufsatz (Konferenz)
Englisch
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