Acta Metallurgica Sinica (English Letters)

, Volume 28, Issue 4, pp 454–459 | Cite as

Effect of Aging on the Microstructure and Mechanical Properties of 1460 Alloy

Article
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Abstract

Effects of the aging temperature on the hardening response, the tensile properties and the precipitate microstructure evolution of 1460 alloy were studied in this work. It was found that Al3 (Sc, Zr) and δ′ (Al3Li) phases were precipitated from the matrix at the very early aging stage, while the precipitation of T1 (Al2CuLi) and θ′ (Al2Cu) was much slower than that of the δ′ phase. When aging at higher temperature (160 and 190 °C), the δ′, T1 and θ′ phases tended to form simultaneously and grow up very quickly. Conversely, the δ′ and θ″ (Al2Cu) phases were precipitated separately and more dispersive at lower aging temperature (130 °C). Taken together, the alloy aged at 160 °C exhibited improved mechanical properties owing to the uniform dispersion of the fine T1 precipitates.

Keywords

Al–Li alloy Precipitate Precipitation hardening process Mechanical property 
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Copyright information

© The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Institute of Metal ResearchChinese Academy of SciencesShenyangChina

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