Structural Features of Ingots Made of Al-Cu-Li System Alloys Depending on its Chemical Composition

Authors: Kolobnev N.I., Ryabova E.N., Khokhlatova L.B., Oglodkov M.S. Published: 12.06.2016
Published in issue: #3(108)/2016  

DOI: 10.18698/0236-3941-2016-3-69-80

Category: Metallurgy and Science of Materials | Chapter: Metal Science, Thermal Processing of Metals and Alloys  
Keywords: ingots, Al-Cu-Li system alloys, heat treatment, phase composition, thermodynamic diagram

The purpose of the research was to examine the microstructure and phase composition of ingots made of Al-Cu-Li-Mg system model alloys. The study tested the influence of the main doping elements on the phase composition and ingot structure in casted and homogenized states. We defined temperature intervals of phase transformations and chose homogenizing temperature by means of differential scanning calorimetry. As a result, we made polythermal and isothermal sections of thermodynamic diagrams of investigated alloys using Thermo-Calc program. The alloys under consideration are in α + δ(AlLi) + T1(Al2CuLi) + S(Al2CuMg) phase area.


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