As Ti rich Ti-Al alloy shows ductile nature with the α2 + γ lamellar structure [1], the mechanism of microstructural evolution in Ti-Al alloys has attracted much interest. Since the lamellar structure is formed by the continuous cooling in industrial processes, cooling rate dependence of α → γ and α → α2 + γ transformations has been extensively studied by many researchers [2-5]. Wang et al. [2,...

Abstract Traditional metallic materials usually face a dilemma between high strength and poor strain hardening capacity. However, heterogeneous structured have been found to obviously overcome the trade-off. Herein, gradient lamellar structure was fabricated through ultrasound-aided deep rolling technique in pure Ni with stacking fault energy after heat treatment. The successively divided into ...

To determine the relative importance of the confining geometry and nanoscopic length scale versus water/interface interactions, the dynamic interactions between water and interfaces are studied with ultrafast infrared spectroscopy. Aerosol OT (AOT) is a surfactant that can form two-dimensional lamellar structures with known water layer thickness as well as well-defined monodispersed spherical r...

Surfactant protein B (SP-B) is synthesized by type II pneumocytes as a proprotein (proSP-B) that is proteolytically processed to an 8-kD protein. In human type II pneumocytes, we identified not only proSP-B, processing intermediates of proSP-B, and mature SP-B, but also fragments of the N-terminal propeptide. By means of immunoelectron microscopy, proSP-B and processing intermediates were local...

The morphology of block copolymer and nanoparticle composites depends not only on the copolymer architecture but also on the surface energy, geometry, and volume fraction of the embedding nanoparticles. Toward a quantitative description of the composite structure and associated thermomechanical properties from a molecular perspective, we examined the performance of a nonlocal density functional...

When thermal energies are weak, two-dimensional lamellar structures confined on a curved substrate display complex patterns arising from the competition between layer bending and compression in the presence of geometric constraints. We present broad design principles to engineer the geometry of the underlying substrate so that a desired lamellar pattern can be obtained by self-assembly. Two dis...

Changes occurring in the degree of crystallinity and lamellar thickness distribution of poly(viny1 alcohol) (PVA) samples during dissolution in water were investigated. PVA samples of three different molecular weights were crystallized by annealing a t 90,110, and 120°C. The initial degrees of crystallinity measured by differential scanning calorimetry (DSC) and by attenuated total reflection F...

We present the first observations of a large-scale coexistence between rod-like and lamellar eutectic growth patterns during directional solidification alloy. In situ experiments with real-time optical monitoring were carried out under microgravity onboard International Space Station (ISS). used transparent succinonitrile-d,camphor alloy that ordinarily forms patterns. At low velocity, short la...