In HCP metals all close-packed planes are parallel so only one need be considered. In it lie three close-packed directions (high LAD) set at 120° to each other. FCC lattices, however, can be cut in four distinct (nonparallel) ways, each yielding a set of close-packed planes. The ...
Relationship between the volume of the unit cell of hexagonal-close-packed Ti, hardness and oxygen content after α-case formation in Ti–6Al–2Sn–4Zr–2Mo–0.1Si alloytitaniumoxygen diffusionelectron probe microanalysissynchrotron radiation X‐ray diffractionIn this study, the influence of oxygen ...
The hcp-fcc transformation can be accomplished via the gliding of Shockley partial dislocations on every two hexagonal close packed planes, resulting in the stacking sequence change of hexagonal close packed planes from …ABABAB… to …ABCABC….. With respect to the combination of Shockley partial...
This high pressure fcc-to-hcp transformation of the high-entropy alloy CrMnFeCoNi involves two close-packed structures that differ only in the stacking sequence of their close-packed planes. Thus, the transformation requires only small atomic displacements associated with the formation of stacking faults...
We investigate the dynamical susceptibility related to the spin correlation within planes and that between planes based on the Hubbard model of the hexagonal close-packed lattice (h.c.p.) above the Curie temperature without a magnetic field. The dynamical susceptibilities are studied within the rando...
hexagonal close-packed latticespin correlationWe investigate the dynamical susceptibility related to the spin correlation within planes and that between planes based on the Hubbard model of the hexagonal close-packed lattice (h.c.p.) above the Curie temperature without a magnetic field. The dynamical...
The atomic order is complex; the four planes of the unit cell have differing concentrations of constituents. In addition there are occasional clusters within the close-packed planes. The magnetic behaviour was investigated using neutron diffraction. Surprisingly, only short-range order is observed in ...
We have investigated twin boundaries in double-lattice hexagonal close-packed metallic materials, focusing on their atomic geometry. Combining accurate ab-initio methods and large-scale atomistic simulations we address the following two fundamental quest
Materials with a hexagonal close-packed (hcp) crystal structure such as Mg, Ti and Zr are being used in the transportation, aerospace and nuclear industry, respectively. Material strength and formability are critical qualities for shaping these materials into parts and a pervasive deformation mechanism...
planes. During this process, the {1 0 −1 2} twinning planes in the parent and twin crystals were not parallel (Fig.1d), implying that the observed process in Fig.1a–cwas not dominated by twinning dislocations1,23. As the twin embryo grew in subsequent compression, CTB on the {1 ...