Influence of deformation and annealing on electrical conductivity, mechanical properties and texture of Al-Mg-Si alloy cables

Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys

“…In addition to the loss of coherency, the longer aging time at 230 °C, second step aging results in the coarsening of the large precipitates at the expense of the small ones. This coarsening effect The decrease in strength values of T6/T7 multiple thermal aging of A 1,3,5,8 cycles, compared to under aging A 0 cycle, may be attributed to the increase in the precipitates size as well as the inter-particle spacing between precipitates, which makes dislocation bowing much easier [15][16][17][18][19]. The decrease in the strength of the 356 alloy, accompanying the over-aging, is related to the loss of the coherency strain surrounding the precipitates through the formation of incoherent, stable β-Mg 2 Si phases.…”

“…In addition, formation of coarse precipitates, at the expense of interspacing, leads to the wide spacing between the precipitates. These two factors contribute to the increase of conductivity of A357/Al-Si-Mg alloys [15][16][17][18]. The reason for this discrepancy might be an additional contribution into the electron scattering of elastic strain fields, which normally exist near the GP zones coherently conjugated with a metal matrix.…”

“…In addition, the application of multiple thermal aging treatments of Ai cycles indicated an enhancement in the elongation results (8-10% for A1,3,5,8 cycles and 15% for A0 under raging cycle), compared to those obtained by standard T6 aging treatment (4-6%) according to the literature in References [10][11][12][13][14][15], as shown by Figure 4. The decrease in strength values of T6/T7 multiple thermal aging of A1,3,5,8 cycles, compared to under aging A0 cycle, may be attributed to the increase in the precipitates size as well as the interparticle spacing between precipitates, which makes dislocation bowing much easier [15][16][17][18][19]. The decrease in the strength of the 356 alloy, accompanying the over-aging, is related to the loss of the coherency strain surrounding the precipitates through the formation of incoherent, stable β-Mg2Si phases.…”

“…These changes facilitate dislocation motion and results in softening effects, thus producing increased ductility, as compared to standard T6 single stage aging. The second stage of the aging (T6-aging) is applied to the T7 heat treated alloys (B i Cycles) to improve the strength results; the application of T7 aging step following the T6 step of A i thermal aging cycles leads to achieving an optimum compromise between strength and elongation values, as compared to those results [11][12][13][14][15][16][17][18] obtained by the application of standard T6 and/or T7 thermal aging. In addition, the optimum compromise between hardness, strength, and ductility values obtained in this study aimed at enhancing the crack-failure resistance of the A357 semi solid alloys used in the fabricating of automotive parts as a suspension control arm.…”

Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

“…In addition, the aluminum and their alloys possess a good performance, castability, high mechanical strength properties and attractive resistance to electrochemical surface degradation [7][8][9]. Many investigators describe these advantages as primary kind of light alloys since structural design, architectural applications, to combustion engines, until tribological functions [10][11][12][13].…”