Accession Number : AD0748519

Title :   A Single Crystal Serves as Turbine Blade,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Petrov,D. ; Tumanov,A.

Report Date : 02 JUN 1972

Pagination or Media Count : 12

Abstract : A technique of growing single grains shaped as turbine blades has been developed at the All Union Scientific Research Institute of Aviation Materials (VIAM). Both solid or hollow blades can be fabricated in this way. The VIAM technique makes possible a complete control of the nucleation and its crystallographic orientation. It just happened that all directions from (001) to (111) are optimum for the strength of turbine blades. Test of single grain specimens made of a nickel base alloy have proved the advantages of the new material. The time to fracture of single grain specimens at 1050C stresses to 14 kg per square mm was 100 hours against 16 hours for polycrystalline specimens. (Author)

Descriptors :   (*METALLOGRAPHY, TURBINE BLADES), (*TURBINE BLADES, *GRAIN STRUCTURES(METALLURGY)), MICROSTRUCTURE, CRYSTAL STRUCTURE, HEAT RESISTANT ALLOYS, HEAT RESISTANT METALS, NICKEL ALLOYS, CREEP STRENGTH, USSR

Subject Categories : Properties of Metals and Alloys
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE