Smectic liquid crystals are remarkable, beautiful examples of materials microstructure, with ordered patterns of geometrically perfect ellipses and hyperbolas. The solution of the complex problem of filling three-dimensional space with domains of focal conics under constraining boundary conditions yields a set of strict rules, which are similar to the compatibility conditions in a martensitic c...

Abstract High entropy alloy is considered a kind of structural and functional materials with wide application prospects. In the present work, FeCrCoNiMo x was prepared used as research object. The influence Mo large atomic radius on crystal structure, microstructure, mechanical properties discussed variation microstructure composition clarified. changes gradually from single phase FCC centered ...

A newly developed microstructure‐sensitive extreme value probabilistic framework for fatigue variability based on computational polycrystal plasticity is exercised to compare the driving forces for fatigue crack formation (nucleation and early growth) at room temperature for four different microstructure variants of duplex a Ti‐6Al‐4V alloy. The aforementioned probabilistic framew...

In mathematical models for crystal microstructure [1,2,27], the deformation gradient is nearly piecewise constant in space to enable the deformation to attain a low energy. The length scale of the microstructure is limited by a surface energy associated with the transition from one piecewise constant variant phase to another piecewise constant variant phase [1, 27]. Motivated by these models, n...

We demonstrate real-time resolved white beam Laue diffraction during compression of micron-sized focused ion beam milled single crystals Au pillars, revealing the dynamical correlation between microstructure and plasticity. The evolution of the Laue patterns of the Au pillars demonstrates the occurrence of crystal rotation and strengthening is explained by plasticity starting on a slip system t...

Cross-correlation frequency-resolved optical gating with an angle-dithered nonlinear-optical crystal permits measurement of the intensity and the phase of the ultrabroadband (as much as 1200 nm wide) continuum generated from microstructure optical fiber. Retrieval revealed fine-scale structure in the continuum spectrum. Simulations and single-shot spectrum measurements confirmed that the fine s...

The research activities are focused on modeling of polymeric liquid crystal (LCP) flows. We first summarizes our comprehensive studies on the shear and elongational flow with an imposed velocity field. This includes a complete characterization of the orientational equilibria and their bifurcation behavior as well as the detailed study on the orientation dynamics with respect to both types of fl...

Quantitative analysis by X-ray powder diffraction of two cokes (pitch coke and petroleum coke) shows that their crystal structure changed with increasing temperature. The crystal data processing of the crystallization degree of disorder is used with further improvement of the proposed microcrystalline-stacking fault calculation method. With this improvement it is now possible to obtain the degr...

Gang JI 1,2,3)∗, Ze ZHANG , Yanxue CHEN , Shishen YAN , Yihua LIU 3) and Liangmo MEI 3) 1) Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, China 2) Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China 3) School of Physics and National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100,...

Nanowires of different natures have been shown to self-assemble as a function of stress at the contact between two macroscopic metallic leads. Here we demonstrate for Au wires that the balance between various metastable nanowire configurations is influenced by the microstructure of the starting materials, and we discover a new set of periodic structures, which we interpret as due to the atomic ...