Electron micrograph of nickel-aluminium

Electron micrograph of nickel-aluminium

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Credit: PROF. I. BAKER/SCIENCE PHOTO LIBRARY

Caption: False-colour transmission electron micrograph (TEM) showing a network of dislocations in a piece of mechanically rolled sheet of nickel-aluminium alloy. Dislocations are line defects or discontinuities caused by slip in the crystal lattice of a solid as a result of stress. In this micrograph, the dislocations have piled up along the grain boundary just visible at top left. The dislocations developed when the cold-rolled sheet of nickel aluminium alloy was reheated, or annealed. The density of dislocations in such a material can be up to 500,000 million per square inch. Magnification: x13,650 at 35mm size. Yellow tint. Ref: MICROCOSMOS, fig. 7.5, page 128

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Keywords: alloy, chemical, chemistry, compound, compounds, dislocation, in a solid, nickel-aluminium, nickel-aluminium alloy

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