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Full Record for Micrograph 728

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- Micrograph no
- 728
- Brief description
- Ni-Superalloy, heat treated above gamma-prime solvus
- Keywords
- nickel
- Categories
- Metal or alloy
- System
- Ni-X
- Composition
- Ni, Cr 14.4-15.2, Co 13-18, Mo 3.5-4.5, Al 3.0-3.3, Ti 4.2-4.8, Ta 2.5, Zr 0.05-0.07, C 0.05, B 0.01-0.03 (wt%) (Ni-Superalloy)
- Standard codes
- Reaction
- Processing
- Heat treated microstructure, consisting of a solutioning and an ageing stage.
- Applications
- Discs are used for high pressure and intermediate pressure turbine discs in Trent 800/900 series gas turbine engines.
- Sample preparation
- Ground to 4000 Grade SiC paper and then polished at 6 <span class="symbol">m</span>m 3 minutes, 1 <span class="symbol">m</span>m 5 minutes, Colloidal silica 10 minutes.
- Technique
- Scanning electron microscopy (SEM) in backscattered electron imaging (BEI) mode
- Length bar
- 10 μm
- Further information
- This micrograph shows a high magnification image of The morphology of g' is discernible as grey ‘blocky’ precipitates, approximately 2mm in diameter. The small white particles present, due to their atomic contrast visible in back-scattered mode, are discernable as MC carbides.
View schematic diagram of g' microstructure - Contributor
- R J Mitchell
- Organisation
- Rolls-Royce University Technology Centre, Department of Materials Science and Metallurgy, University of Cambridge
- Date
- 05/03/03
- Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
- Related micrographs
- Micrograph 724: Ni-Superalloy, as-extruded microstructure (10 μm)
- Micrograph 725: Ni-Superalloy, as-extruded microstructure (10 μm)
- Micrograph 726: Ni-Superalloy, heat treated above gamma-prime solvus (10 μm)
- Micrograph 727: Ni-Superalloy, heat treated above gamma-prime solvus (100 nm)
- Micrograph 729: Ni-Superalloy, exposed microstructure (10 μm)
- Micrograph 734: Ni-Superalloy, as-extruded microstructure (20 μm)