Effect of heat treatment on mechanical properties of alloy 909

Alloy 909 is a Ni-Fe-Co alloy that exhibits a low coefficient of thermal expansion and high strength at elevated temperatures. These characteristics are suitable for demanding high temperature uses such as turbine components for aerospace and energy generation. The mechanical properties are achieved...

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Bibliographic Details
Published in:Materials science and technology 2011-06, Vol.27 (6), p.1092-1097
Main Authors: Covarrubias, O, Elizarrarás, O, Colás, R
Format: Article
Language:English
Subjects:
Aircraft components
Alloys
Chemical precipitation
Heat treating
Heat treatment
Materials science
Mechanical properties
Mechanical testing
Metallurgical analysis
Microstructure
Nickel base alloys
Precipitation
Ring rolling
Rupture tests
Superalloys
Thermal expansion
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Summary:Alloy 909 is a Ni-Fe-Co alloy that exhibits a low coefficient of thermal expansion and high strength at elevated temperatures. These characteristics are suitable for demanding high temperature uses such as turbine components for aerospace and energy generation. The mechanical properties are achieved by heat treatment (solution and aging) that affects the microstructural characteristics such as grain size and precipitation of intergranular and transgranular particles. This work summarises the results of trials conducted to determine the conditions that assure the desired mechanical properties in high temperature ring rolled pieces. Results of tensile, hardness and stress rupture tests are complemented by microstructural analyses. These studies allowed for establishing a robust method for the manufacture of rings; no degradation of the product, either metallurgical or due to properties, has been reported after the method was implemented.
ISSN:0267-0836
1743-2847
DOI:10.1179/026708310X12677993662005