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Ni-based superalloys are widely accepted as being suitable candidates for use in the blade sections of gas turbine engines where improvements in high temperature creep resistance properties are possible as a result of a designed microstructure. The oxide dispersion strengthened (ODS) superalloy MA6000 was subjected to a high temperature creep environment at stresses ranging from 150-550 MPa and temperatures of 750, 950 and 1050 C. The potential of certain destructive and non-destructive techniques in detecting the resultant creep damage was explored. The microstructural damage was examined by: (i) qualitative and quantitative metallography; (ii) ultrasonic wave velocity measurements; (iii) microhardness indentations. The responses from the different techniques were compared to each other and to results obtained from austenitic and ferritic steels in order to serve as a basis for assessing residual life.

Additional information

Authors: MORRISSEY A M, Trinity College, Department of Mechanical and Manufacturing Engineering, Dublin (IE);SCHOLZ R, JRC Ispra (IT)
Bibliographic Reference: Paper presented: IMFIO - Irish Materials Forum, Coleraine (IE), September 7-9, 1994
Availability: Available from (1) as Paper EN 38709 ORA
Record Number: 199411541 / Last updated on: 1995-01-10
Original language: en
Available languages: en
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