Full Record for Micrograph 724
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- Micrograph no
- Brief description
- Ni-Superalloy, as-extruded microstructure
- extrusion , nickel
- Metal or alloy
- 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
- Extruded at 1100ÂºC with a 5.5:1 reduction in area.
- 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.
- Scanning electron microscopy (SEM) in backscattered electron imaging (BEI) mode
- Length bar
- 10 μm
- Further information
- Micrograph shows a fully recrystallized microstructure containing many equiaxed grains and g' precipitates. In addition to this there are also several carbides and borides (seen as white). There is evidence of misorientation between adjacent grains, demonstrated by the large degree of contrast.
View schematic diagram of g' microstructure
- R J Mitchell
- Rolls-Royce University Technology Centre, Department of Materials Science and Metallurgy, University of Cambridge
- Licence for re-use
- Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
- Related micrographs
- 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 728: Ni-Superalloy, heat treated above gamma-prime solvus (10 μm)
- Micrograph 729: Ni-Superalloy, exposed microstructure (10 μm)
- Micrograph 734: Ni-Superalloy, as-extruded microstructure (20 μm)