Comment on 'Positron lifetime study of an Al-1.7 at.% Mg-1.1 at.%Cu alloy'

Calorimetric results on an Al-Mg-Cu alloy do not agree with a recent interpretation of positron annihilation experiments but support earlier proposals. The first hardening stage in Al-Cu-Mg alloys is caused by the formation of Guinier-Preston-Bagaryatsky zones; their replacement by more stable phase...

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Bibliographic Details
Published in:Philosophical magazine letters 2002-01, Vol.82 (1), p.9-12
Main Authors: Zahra, A.-M., Zahra, C.Y.
Format: Article
Language:English
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Summary:Calorimetric results on an Al-Mg-Cu alloy do not agree with a recent interpretation of positron annihilation experiments but support earlier proposals. The first hardening stage in Al-Cu-Mg alloys is caused by the formation of Guinier-Preston-Bagaryatsky zones; their replacement by more stable phases increases the amount precipitated and leads to a second rise in hardness with increasing temperature.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500830110098736