Combined effect of heat treatment and rolling on pre-strained and SPDed aluminum sheet

Effect of tool pin design on the microstructural evolutions and tribological characteristics of friction stir processed structural steel

“…The grain and sub-grain boundaries thus become the main obstacle to the slip of dislocations and the materials with a smaller grain size would have higher hardness or strength as it might impose more restriction to the dislocation movement. This discussion is also claimed in many materials science literatures [12,24,25]. Microhardness measurements are performed on the cross-section of samples (Fig.…”

Microanalysis of crystallographic characteristics and structural transformations in SPDed Al Mn Si alloy by dual-straining

“…Direct-rolling was carried out along the longitudinal-axis M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT of CGP and cross-rolling was accomplished with 90° rotation. For studying the microstructural evolutions, polarized-light optical microscope was utilized after prevalent metallography and etching by patented JE-WorldTech ® reagent [8]. The crystallographic characteristics and structural transformations of deformed specimens acquired from XRD patterns using monochromatic Rikagu diffractometer.…”

The Fracture Behavior and Thermal Stability of Commercially Pure Nickel Sheets Processed by Constrained Groove Pressing

“…Another reason for the fatigue fracture was the simple deformation field of traditional CGP procedure contributing to the cyclic deformation of the materials around the groove corners [24]. Therefore, changing straining/deformation paths could provide the chance of obtaining CGP sheets free of fatigue fracture [9].…”

“…Another reason for the fatigue fracture was the simple deformation field of traditional CGP procedure contributing to the cyclic deformation of the materials around the groove corners [24]. Therefore, changing straining/deformation paths could provide the chance of obtaining CGP sheets free of fatigue fracture [9]. It has been revealed that the change of deformation mode as well as the localized plastic deformation during CGP led to deformation marks appearing at the sheet surface and serving as sites of stress concentration [18].…”

“…In addition, SPD materials usually have high strength but low ultimate tensile strain. In this regard, it is important to study the annealing behavior of SPD materials with the objective of exploring their thermal stability and improving the ductility and toughness with minimized loss of strength [7][8][9]. So far, several investigations about the influence of heat treatment on CGP materials have been reported.…”