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Precipitation phenomena, thermal stability and grain growth kinetics in an ultra-fine grained Al 2014 alloy after annealing treatment

“…Al 2014 alloy is an age hardening alloy which shows complex precipitation behaviour during age hardening. Possible second phases evolved during thermal treatment (age hardening) of this alloy are CuAl 2 , Al 5 Cu 2 Mg 8 Si 5 and Mg 2 Si [21][22][23]. The morphology and kinetics of formation of these phases during thermal treatment will be totally different in case of CR Al 2014 alloy.…”

Effect of alternative heat-treatment parameters on the aging behavior of short-fiber-reinforced 2124 Al composites

“…The structural changes that occur during the aging of these alloys have been extensively studied. [16][17][18][19] According to S. K. Varma et al 18 and A. P. Sanino and H. J. Rack 19 , the precipitation sequence in the pseudo-binary Al-Al 2 CuMg alloy (Al-3 % of mass fractions of Cu-1.5 % of mass fractions of Mg) can be represented as follows in Equation (1):…”

Solutionizing effects on deformation-induced phase transformations in 2014 aluminum composite

“…Another phase in of alumina particles (VFAP). [1][2][3][4][5][6] The composites show the which four metals are present has a chemical formula given formation of a series of Guinier-Preston (GP) zones leading by Al 5 Cu 2 Mg 8 Si 5 , which has a hexagonal crystal structure to the formation of metastable phases ␤Ј and Ј in 6061 and and has been assigned a symbol of . This phase also has 2014 aluminum alloy composites, respectively, as a function its metastable counterpart known as Ј .The third type of of aging time in a range of temperatures from 160 ЊC to phase in this system is called the S phase, which has the 220 ЊC besides another phase Ј in 2014 aluminum alloy chemical composition given by Al 2 CuMg with an orthocomposite usually nucleated at the dislocation lines.…”

“…This phase also has 2014 aluminum alloy composites, respectively, as a function its metastable counterpart known as Ј .The third type of of aging time in a range of temperatures from 160 ЊC to phase in this system is called the S phase, which has the 220 ЊC besides another phase Ј in 2014 aluminum alloy chemical composition given by Al 2 CuMg with an orthocomposite usually nucleated at the dislocation lines. [1][2][3][4][5][6][7][8][9][10][11][12] rhombic crystal structure. The effect of increasing solutionizing time at a given temperThus, the purpose of this article is to report the results of ature on the age-hardening curves has been found to be such an experimental study to investigate the effect of solutionizthat the time required to achieve the peak hardness value ing time and/or temperature on the work-hardening characdecreases in the monoliths, while either a (1) decrease and teristics and microstructural developments in 2014 then increase or (2) decrease and then stabilized values have aluminum alloy and its composites reinforced with 0.1 and been observed for the composites.…”

“…expansion (CTE) values between matrices and reinforcements and the concentration of quenched-in vacancies can account for the observed aging behavior of composites and their monoliths. [1][2][3][4][5][6] The quenched-in vacancies and CTE II. EXPERIMENTAL DETAILS dislocations have been observed to be the nucleation sites for the precipitates originating from the GP zone series (for The composites of 2014 aluminum alloy reinforced with both composites), while CTE dislocations promote the Ј 0.1 and 0.15 VFAP were purchased from Duralcan Inc. in precipitation (for 2014 aluminum alloy composite only) durrod and sheet forms, respectively.…”