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The microstructure of a quenched β phase Cu–Zn–Al–Ni alloy has been analysed by transmission electron microscopy. Different types of dislocations were observed, which seemed to be the main vacancy sinks. They are present as single dislocations, loops and helical dislocations. The latter had axes perpendicular to the Burgers vector, spreading around an angle of 30° from the nearest 〈100〉 direction...
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