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

• Published in: Acta metallurgica sinica : English letters Vol. 28; no. 4; pp. 454 - 459
• Main Authors: Ma, Juan, Yan, De-Sheng, Rong, Li-Jian, Li, Yi-Yi
• Format: Journal Article
• Language: English
• Published: Heidelberg The Chinese Society for Metals 01.04.2015; Springer Nature B.V
• Subjects: Age; Aging; Aging (metallurgy); Al3Li; Alloying effects; Alloys; Aluminum base alloys; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Dispersions; Evolution; Investigations; Materials Science; Mechanical properties; Metallic Materials; Microstructure; Morphology; Nanotechnology; Organometallic Chemistry; Phases; Precipitates; Precipitation; Spectroscopy/Spectrometry; Temperature; Tensile properties; Tensile strength; Tribology; Zirconium; 力学性能; 合金; 均匀分散; 时效温度; 硬化反应; 组织; 结构演变; Precipitation hardening process; Precipitate; Al–Li alloy; Mechanical property
• ISSN: 1006-7191; 2194-1289
• DOI: 10.1007/s40195-015-0219-7

Effects of the aging temperature on the hardening response, the tensile properties and the precipitate micro- structure 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 ℃）, 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 ℃）. Taken together, the alloy aged at 160 ℃ exhibited improved mechanical properties owing to the uniform dispersion of the fine T1 precipitates.