The ZK61 alloy rods with different grain sizes and crystallographic texture were successfully fabricated by cyclic extrusion and compression (CEC). Their room-temperature tension & compression yield strength displayed a significant dependence on grain size and texture, essentially attributed to {10-12} twinning. The texture variations were characterized by the angle θ between the c-axis of ...

3D ink-extrusion of powders followed by sintering is an emerging additive manufacturing method capable creating metallic microlattices. Here, we study the creation hierarchically porous Fe or Ni scaffolds extrusion 0/90° lattices from inks consisting fine oxide (Fe2O3 NiO, < 3 µm), coarse space-holder particles (CuSO4, 45 µm) and a polymer binder within solvent. After leaching debinding lattice...

To preserve epithelial barrier function, dying cells are squeezed out of an epithelium by "apoptotic cell extrusion." Specifically, a cell destined for apoptosis signals its live neighboring epithelial cells to form and contract a ring of actin and myosin II that squeezes the dying cell out of the epithelial sheet. Although most apoptotic cells extrude apically, we find that some exit basally. ...

This paper reports on an experimental and finite element analysis (FEA) of the cold extrusion of high-grade (AA1100) aluminium. The influence of die angle, reduction ratio and die land on the extrusion force during the extrusion process was investigated. A forward extrusion die was designed and manufactured for the purpose of the experimental research. Interchangeable elements of the extrusion ...

A severe plastic deformation process, termed accumulative extrusion bonding (AEB), is conceived to steady-state bond metals in the form of multilayered tubes. It shown that AEB can facilitate their solid-state, like process roll (ARB). The steps involve iterative extrusion, cutting, expanding, restacking, and annealing. As iterated, laminated structure layer thicknesses decrease within tube wal...

Deformation of the material during cyclic expansion extrusion (CEE) is investigated using upper-bound theorem. The analytical approximation of forming loads agrees very well with the FEM results for different amounts of chamber diameter, friction factor and also for lower die angles. However, the difference between analytical and numerical solution increases at higher die angles which are expla...

The work is devoted to researching a new method of hot direct-reverse extrusion hollow conical products from high-carbon steel and determinated parameters for technological design. considered makes it possible obtain in one step with different wall thickness height, while the upper part product can be greater than bottom part. dimensions initial workpiece are determined by modeling using finite...

We present a means of extracting lava dome extrusion rates from data provided by the Thematic Mapper and Enhanced Thematic Mapper Plus instruments flown on the Landsat satellites. Extrusion rates derived from the Landsat data for Santiaguito dome complex (Guatemala) during November 1987 and January 2000 of 0.72€0.08 and 0.48€0.09 m3 s–1 compare favorably with ground-based estimates of 0.63€0.28...

This article covers the development of thermoplastic extrusion films made poly(vinyl acetate) (PVA) and poly(butyl methacrylate) (PBMA) for use as an inner layer in metal-polymer-metal multiple-layered vibro-damping materials that can work contact with water. The effect amount introduced plasticizer on dynamic properties polymer PVA PBMA is studied example plasticizers from group esters dicarbo...

This paper describes a variation to the traditional intrusion detection approach motivated by longstanding challenges and recent trends in information security. Intrusion detection systems have historically focused on the protection of local resources by identifying signs of malicious activity that may help administrators prevent a break-in and limit its effects. Outbound intrusion detection fo...