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Empirical Zn-equivalent composition design of a high-Zn Al-Zn-Mg-Cu-Sc-Zr-B alloy with high strength and retained ductility
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DOI：10.1016/j.matchar.2026.116906.png)
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Abstract
En 中文
• A high-Zn Al-Zn-Mg-Cu-Sc-Zr-B alloy was designed without cold deformation. • An empirical Zn-equivalent index guided the selection of a high-Zn composition. • Aging produced dense η' precipitates with an equivalent size of about 3.34 nm. • The aged alloy achieved 665 MPa UTS and 13.5% elongation. • Dense nanoscale η' precipitates provided the principal artificial-aging-related strengthening effect.
Keywords:
Al-Zn-Mg-Cu alloy
High-Zn aluminum alloy
Zn-equivalent composition design
Η' precipitation
Strength–ductility synergy
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1.1W
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3.4W
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