نتایج جستجو برای: high angle boundaries hagbs
تعداد نتایج: 2214250 فیلتر نتایج به سال:
Abstract As high-entropy alloys receive an increasing amount of attention, interesting scientific question arises: can grain boundaries be “high entropy”? In 2016, we proposed “high-entropy boundaries” as the boundary counterparts to materials. Here, discuss underlying interfacial thermodynamics elaborate relevant concepts. We emphasize that are neither equivalent in materials nor simply “compo...
A crack-free Ti-43Al-9V-0.2Y alloy sheet was successfully fabricated via hot-pack rolling at 1200 °C. After hot-rolling, the β/γ lamellar microstructure of the as-forged TiAl alloy was completely converted into a homogeneous duplex microstructure with an average γ grain size of 10.5 μm. The dynamic recrystallization (DRX) of the γ phase was systematically investigated. A recrystallization fract...
The unique nonuniform deformation characteristic of high-pressure torsion was used to produce nanostructures with systematically varying grain sizes in a copper disk, which allows us to study the grain-size effect on the deformation mechanisms in nanostructured copper using a single sample. The as-processed copper disk has 100–200 nm grains near its center and 10–20 nm grains at its periphery. ...
a nano/ultra-fine grain al-0.2wt% zr alloy was produced by accumulated roll bonding (arb) processafter 10 cycles. the fraction of high angle grain boundaries increased from 8% to 65.4% during 10passes during arb process. this alloy was subjected to tensile test at different temperatures (523,573and 623 k) and strain rates (0.1 and 0.01 s-1). the optimum condition of temperature and strain rate ...
The atomic structure of the cubic-SiC(001) surface during ultra-high vacuum graphene synthesis has been studied using scanning tunneling microscopy (STM) and low-energy electron diffraction. Atomically resolved STM studies prove the synthesis of a uniform, millimeter-scale graphene overlayer consisting of nanodomains rotated by ±13.5° relative to the left angle bracket 110 right angle bracket-d...
When joining between GA980 and A6061 plates by the FSSW, brittle intermetallic compounds Zn-contained region are formed at joint interface. These local reaction products determine strength of joint. Therefore, bonding interface microstructure analysis is crucial to control process improve strength. This study performed microstructural near on GA980/A6061 joints bonded FSSW. The detailed variati...
The interest in the crystallography of structural transformations is driven by emerging capabilities texture control and resulting anisotropy physical-mechanical properties functional materials products. recrystallization cold-drawn Cu Al samples after annealing at different temperatures was studied using EBSD. Equivalent deformation textures are transformed into textures. nuclei formed high-an...
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