A nanostructural design to produce high-strength Al alloys with enhanced electrical conductivity

Enhanced Mechanical Properties and Electrical Conductivity in Ultrafine-Grained Al 6101 Alloy Processed via ECAP-Conform

“…These precipitates point to the fact that the UFG structure formation during ECAP-C was accompanied by solid solution decomposition due to the dynamic aging (DA). It has also been previously observed in various Al-Mg-Si alloys during SPD both at elevated [19][20][21][22][23][24][41][42][43][44][45] and room temperature [23,24,46].…”

“…The observed decrease in <ε 2 > 1/2 , ρ, and, particularly, in а, is the reason for high electrical conductivity of UFG wire rods (Table 2). Such an interrelation between а parameter and electrical conductivity has already been established in the studies [19,[21][22][23]. At present, SPD techniques aimed at processing of commercially applicable UFG metals and alloys with enhanced mechanical and functional characteristics are actively developed [26,53].…”

“…metastable and stable modifications using severe plastic deformation (SPD) [19][20][21][22][23]. The strengthening up to 365 MPa can be achieved via grain refinement during SPD, as well as through precipitation hardening induced by following dynamic aging.…”

“…The research [19][20][21][22][23][24] has also proved that in parallel with the formation of UFG structure, SPD also considerably accelerates the decomposition of a supersaturated solid solution and contributes to a greater reduction of the content of alloying element atoms in the Al matrix of Al-Mg-Si alloys as compared to conventional processing techniques. In good agreement with the Matthiessen's rule for dilute alloys [25], this leads to the increase in electrical conductivity of UFG alloys up to more than 58% IACS [19][20][21]. The approach was used to process Al-Mg-Si alloys via such SPD processing techniques as high pressure torsion (HPT) and equal channel angular pressing with parallel channels (ECAP-PC).…”

Влияние отжига на микроструктуру и механические свойства ультрамелкозернистого технически чистого Al

“…В по-следние годы были проведены исследования влияния интенсивной пластической деформации (ИПД) на меха-нические свойства Al и сплавов на его основе [1][2][3][4][5][6][7][8][9][10]. Было показано, что ИПД приводит к повышению проч-ности и микротвердости за счет измельчения зерен до ультрамелкого масштаба и повышения плотности дефектов кристаллической решетки [1,2,[5][6][7][8], а также за счет формирования особой структуры границ зерен (ГЗ) [1]. Существенным недостатком ультрамелкозер-нистой (УМЗ) структуры является значительное сни-жение пластичности по сравнению с пластичностью в крупнозернистом (КЗ) состоянии [6].…”