TPWJ, 2018, #11-12, 83-90 pages
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #11-12, 2018 (November)
Prospects of development of welded single-crystal structures of heat-temperature nickel alloys
K.A. Yushchenko, B.A. Zadery, I.S. Gakh and A.V. Zvyagintseva
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
Heat-temperature nickel alloys with single-crystal structure are used in such branches of production as turbine manufacture, aerospace engineering and power engineering. However, their further mastering is restrained by complexity, and sometimes impossibility of production of structure elements of large sizes and developed geometry. Production as well as repair using traditional methods of single-crystal products with developed geometry such as, for example, long or cooled gas turbine blades etc., represents a complex technological problem. Manufacture of assemblies, parts, structures of such type by means of their welding from separate elements or building-up often seems to be more reasonable and allows developing products with single-crystal structure on virtually new basis. The aim of the presented work is development of new approaches applicable to manufacture of the single-crystal welded structures of critical designation with increased mechanical characteristics and service parameters. The results of investigations and examples of pilot welded structures of such type, produced at the E.O. Paton Electric Welding Institute of the NAS of Ukraine, are presented. 30 Ref., 9 Figures.
hight-temperature nickel alloys, single-crystals, welded structures of complex geometry, electron beam welding, gas turbine blades, conditions of formation of single-crystal structure
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