Effects of copper on precipitation and quench sensitivity of AlZnMg alloys

A calorimetric study using AlZnMgCu alloys (7075) has shown that Cu significantly changes the intermediate precipitate phase in AlZnMg alloys, and has demonstrated the efficacy of a small Cu addition (0.63%) to reduce the sensitivity of AlZnMg alloys to large variations in cooling rates. A model has...

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Veröffentlicht in:	Scripta metallurgica 1984-05, Vol.18 (5), p.483-488
Hauptverfasser:	Livak, R.J., Papazian, J.M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Metals, semimetals and alloys Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Specific materials Treatment of materials and its effects on microstructure and properties
Online-Zugang:	Volltext
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Zusammenfassung:	A calorimetric study using AlZnMgCu alloys (7075) has shown that Cu significantly changes the intermediate precipitate phase in AlZnMg alloys, and has demonstrated the efficacy of a small Cu addition (0.63%) to reduce the sensitivity of AlZnMg alloys to large variations in cooling rates. A model has been proposed to explain this observation based on the enhanced formation of solute--vacancy complexes during the quench that nucleate the transition eta ' precipitates during aging. 16 ref.--AA.
ISSN:	0036-9748
DOI:	10.1016/0036-9748(84)90426-5