Evidence of multi-layer GP zones in Al-1·7at.%,Cu alloy
- 1 April 1986
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 53 (4) , 495-504
- https://doi.org/10.1080/01418618608242848
Abstract
GP zones in A1-1·7at.%Cu alloy aged at room temperature for 760 h, and 373 and 403 K for less than 1000min, have been observed by field-ion microscopy to elucidate the structure of the zones. A typical zone structure was found to be the well-known single layer of Cu atoms on (001) planes. On the other hand, another type of zone, i.e. multi-layer GP zones, was found to co-exist with the single-layer GP zones. Detailed observation on (022) and (002) planes showed that the multilayer GP zones consist of a few Cu-rich layers on (002) planes.Keywords
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