Jet turbine blade

Jet turbine blade

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Credit: DR E. LEISTNER/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a section from a turbine blade of a jet aircraft. The specimen has been etched to show the constituents of the special alloy used to make the blade. Turbine blade tips move at almost the speed of sound & experience massive centrifug- al forces. The metals chromium, cobalt, nickel & aluminium usually feature in the alloy mix, along with carbide-forming elements tungsten, titanium, tantalum, & molybdenum. In this micrograph, the medium & dark blue regions are a nickel- aluminium- titanium phase; the white granules are the mixed carbides. The grey areas are the arms of dendrites formed when the blade was cast. (Polished section, Weck's etch). Magnification: x200 at 35mm size. Ref: MICROCOSMOS, fig. 8.12, p. 155

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Keywords: alloy, chemical, chemistry, compound, compounds, in jet turbine, light micrograph, of jet (lm), turbine blade

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