The kinetics of HCP-BCC structure phase transition is studied by precise pressure measurement technique in 4 He crystals of different quality. An anomalous pressure behavior in bad quality crystals under constant volume conditions is detected just after HCP-BCC structure phase transition. A sharp ...
The crystal structure is one of the most dominant factors that strongly affect the properties of an alloy, because the electronic structure changes drastically with the crystal structure1,2. A solid-solution alloy, in which the constituents are randomly mixed at the atomic scale, generally adopts ...
this entire isrotatedwhena volumefractionof inthe hasbeen crystal given twinningcrystal reached.Inordertodescribethe effectsof aformulationwitha boundary grains termis modelisdescribedinthe rate—dependentapplied,thecrystalplasticity spatial a lawformulatedina form.Aself-consistent configuration,withhardening ...
1. The schematic of the unit cell of HCP structure in two-dimension is shown in terms of lattice constant a and c. Calculate the volume of the HCP unit cell with a = 0.2665 nm and c = 0.4947 nm. Also, calculate the atomic packing fact...
关键词:f10P多晶体;晶体塑性;数值模拟;自洽模型 英文摘要 ABSTRACT The present workchoosesHCP crystals asthe object of study.Starting fromthe microscopicplastic deformationand hardening mechanismsofHCP crystals the mieromechanic descriptions ofthe slip and twinning mechanismsof crystalplasticity andthe boundary...
X-ray diffraction measurements revealed a strong preferential orientation (texture) in the (1 0–1 0) direction for the hcp phase, which increases the nanowire length as well as crystalline grain size, degree of orientation, and volume fraction of oriented material. The first-order reversal ...
From both analytical and experimental results, is well known that there are two predominant ways of stacking mono-disperse spheres to minimize the interstitial volume in a colloidal crystal. One of them leads to a close packed face-centered-cubic (fcc) structure, called synthetic opal, and, the...
Scientific Reports volume 7, Article number: 9550 (2017) Cite this article 3296 Accesses 13 Citations Metrics details Abstract Twins play an important role in the deformation of nanocrystalline (NC) metals. The size effects of {101¯2} tensile/{101¯1} compressive lamellar twins on the ...
A total of six different types of packets in the pseudosingle crystal volume is realized in accordance with the Burgers orientation relationships. The structural heredity in the titanium pseudosingle crystal after the cycle of the α→β→α transformations is confirmed. 展开 ...
Reflection high energy electron diffraction and X-ray diffraction analyses indicate that the metastable hcp-NiFe crystal tends to transform into more stable fcc crystal during film growth process. With increasing the substrate temperature, the volume ratio of hcp crystal decreases, whereas that of fcc...