Effect of SPD and friction stir welding on microstructure and mechanical properties of Al–Cu–Mg–Ag sheets

Natural ageing of aluminium processed by twist channel angular pressing

“…Due to their superior properties, materials processed by means of SPD can be used for various applications e.g. in electrotechnics [4], automotive [5], aircraft [6], military [7], as well as in biomedicine [8,9]. SPD is for example suitable for production of high-strength electro-conductive copper [10], consolidation of nano-scaled Al-based composites [11,12], improvement of corrosion resistance of pure Mg [13], enhancement of hydrogen sorption capacity of Mg [14], decreasing the elastic modulus of Tibased biocompatible alloys [15], and increasing the corrosion resistance of bio-applicable Mg-based alloys [16,17].…”

Strengthening mechanisms and deformation behavior of cryomilled Al–Cu–Mg–Ag alloy

“…The field of BNM evolved during the last decade to encompass more complex systems, such as alloys and composites [4][5][6][7][8][9][10][11]. On the basis of this body of literature, there are multiple strengthening mechanisms that may be active in nanostructured alloys and composites, including grain size strengthening (Hall-Petch) [1][2][3][4][5][6][7][8][9][10][11][12][13][14], solid solution strengthening [3,8,15], dispersion strengthening [3,4,11,16,17], precipitate strengthening [4,7,8,11], and dislocation strengthening [14,18,19]. The Hall-Petch relationship predicts an increase in strength that is inversely dependent on the square root of the grain size [20,21]; this prediction has been confirmed by numerous published studies, with rare exceptions reported mostly for materials with grain sizes that are <10 nm.…”

“…SPD can also lead to atomic mixing under shear deformation [23] as well as increases in solid solubility [3], which effectively augment the contribution of solid solution hardening to the strength of metals. More recently, studies on precipitation hardened BNMs have been published [4,8,9,24,25]. In view of these and other studies, the present work was motivated by two factors: first, to study the influence of the nanoscale dimensions on the kinetics of precipitation reactions, and second, to ascertain the possibility of introducing an additional strengthening mechanism, such as precipitation or dispersion strengthening into BNMs and composites.…”

Mechanical and microstructural properties of EN AW-6060 aluminum alloy joints produced by friction stir welding

“…Butt joints of 1060 aluminum alloy and commercially pure copper were produced by friction stir welding (FSW) and the effect of welding parameters on surface morphology, interface microstructure and mechanical properties was investigated [7]. The effect of severe plastic deformation (SPD), FSW and heat treatment on the microstructure and mechanical properties of the welds and sheets was examined [8]. The effect of processing parameters on mechanical and microstructural properties of AA6056 joints produced by FSW was analysed [9].…”