An investigation of microstructural evolution during equal-channel angular pressing

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

“…By tilting the TEM specimen, the imaged grains changed continuously indicating that the misorientation between neighboring grains are small. This agrees with the TEM observations on ECAP processed Al samples in the literatures [24,25]. When the equiva- lent strain was two, the elongated sub-grains are divided by boundaries with low angles of misorientation.…”

Effect of ECAP processing on microstructure evolution and dynamic compressive behavior at different temperatures in an Al-Zn-Mg alloy

“…Early research on the ECAP processing of Al alloys was generally focused on the significance of the grain refinement [9][10][11][12]. More recently, there is a growing interest in investigating the coupling effect of grain refinement and the introduction of dislocations and precipitation on the strength of Al alloys [13,14].…”

The microstructural characteristics of ultrafine-grained nickel

“…In ECAP a bar or rod is pressed through a die constrained within a channel bent into an L-shaped configuration [1,[18][19][20] whereas in HPT a thin disk is subjected to a high pressure and concurrent torsional straining [4,5,21]. Although there have been extensive reports documenting the microstructural evolution taking place during SPD processing in ECAP [22,23] and HPT [5] and the subsequent stability of the UFG microstructures in annealing treatments [24][25][26], relatively little attention has been given either to the development of texture in SPD processing or to the nature of the grain boundary misorientation distributions. However, both of these parameters play a significant role in determining the bulk properties of the materials [27,28].…”