Grain fragmentation associated continuous dynamic recrystallization (CDRX) of hexagonal structure during uniaxial isothermal compression: High-temperature α phase in TiAl alloys

Structural Strength Analyses for Low Brass Filler Biomaterial with Anti-Trauma Effects in Articular Cartilage Scaffold Design

“…These results also indicated that a higher low brass filler composition percentage provided a higher exponential tensile strength and strain at break for the biomaterials. Therefore, a small amount of low brass filler was needed to provide shear deformation and grain refinement reaction forces, AGB dislocations, and lattice plane distortion [50][51][52][53]. As a result, a small amount of low brass filler provided the requisite strength in this scaffold design [6,7].…”

“…The additional tensile strength was due to the continuous dynamic recrystallization mechanism consisting of shear deformation force and grain refinement reaction force [50], as shown in Scheme 1. The initial nucleation phase with the low angle grain boundary (AGB) was dislocated [51] by absorbing shear deformation forces into a boundary contact phase with high AGB [52] and then releasing the grain refinement reaction force to restore the initial phase [53]. The low brass filler in biomaterial sheared their AGB by increasing the strain at break, and tensile strength was increased by distorting the lattice plane [53], as illustrated by the OL and HA curves in Scheme 1.…”

Subdivision of Dynamic Recrystallization Mechanism in the Transition Zone and Microstructure Evolution of Incoloy825 Alloy

“…These grains and grain boundaries do not originate from the original grain boundaries, and are directly formed in the original grains due to the differential orientation gradient of the grain boundaries, which is obviously the characteristic of the CDRX mechanism. [ 50 ] As can be seen from Figure 13a, in the deformed grains, these newly formed HAGBs are formed at 45° along the compression direction, that is, the direction of the slip band. On the other hand, the local kernel average misorientation (KAM) maps can be used to evaluate the distribution of dislocation density in materials.…”

Nanoindentation study of hydride diffusion layer in commercial pure titanium

“…The TD surface of initial Sample A was ground with 500-2000 grit SiC and then rough polished with 9-3 μm diamond, followed by 20 s electrolytic polishing to obtain free-stress surface. Electrolytic polishing was performed with a solution of 5% perchloric acid, 35% butan-l-ol and 60% of methanol at 40 V at temperatures lower than 5 • C [18]. After hydrogen charging, the sample were mounted with Struers Polyfast resin to protect the diffusion surface during the metallographic preparation process.…”