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Distinct Hardening Behavior of Ultrafine-Grained Al-Zn-Mg-Cu Alloy
Journal article

Distinct Hardening Behavior of Ultrafine-Grained Al-Zn-Mg-Cu Alloy

Kaka Ma, Thale Smith, Tao Hu, Troy Topping, Enrique Lavernia and Julie Schoenung
Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.45(11), pp.4762-4765
10/2014
DOI: https://doi.org/10.1007/s11661-014-2498-4
Handle:
https://hdl.handle.net/20.500.12741/rep:5686

Abstract

Characterization and Evaluation of Materials Material Science Metallic Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
The age-hardening response for ultrafine-grained, powder-metallurgy-consolidated aluminum 7091 was investigated for the first time. Peak hardening occurred after aging at 353 K (80 °C) for only 4 hours; further aging for up to 26 hours resulted in only slight fluctuations in hardness values. After the 4-hour aging, the precipitate population consists of a high density of nanoscale GP zones (diameter ~3 nm) and nanoscale η′ phase (<30 nm); η phase is not present.

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