We report quasi-static compression and impact behavior of aluminum syntactic foams (ASF) produced by melt infiltration. Aluminum syntactic foams with relative density of 0.46 were produced using hollow alumina spheres (4.45 mm and 3.05 mm) randomly situated in a mold and two types of aluminum alloy (1100 and 6061). The impact behavior was investigated using an instrumented drop tower. We invest...

sandwich panel with central core honeycomb aluminum as one of the main shielding structures because of their high strength-to-weight ratio and improved energy absorption capacity, has been attracted the attention of many researchers and practitioners in recent years. this paper initiates and presents a new type of central core honeycomb formed by hydroforming process. the study is augmented by ...

In this article we report on two dimensional sheet charge and mobility in GaN/AlGaN heterostructure field effect transistors. Both experimental and theoretical results are presented. Experimental results are reported on samples grown by metal organic chemical vapor deposition ~MOCVD! and molecular beam epitaxy ~MBE!. Theoretical studies are done to examine how spontaneous polarization and piezo...

. . . . . . . . . . . . . . . . . 3 Introduction . . . . . . . . . . . . . . . . . . . . 4 Se l ec t i ono f I so tope . . . . . . . . . . . . . . . . 5 Working Conditions . . . . . . . . . . . . . . . . . . 6 T r a n s f e r of a P a p e r Chromotogram to a Metal Sheet . . . . . 6 I r rad ia t ion Development and Identification of Radioisotopes . . . . . 8 Aluminum T a r g e t . . . . . . . . ...

When a rigid cone is slowly pushed through a thin elastic sheet, the material breaks, exhibiting a network of cracks expanding in the radial direction. Experiments conducted with aluminum sheets show that the number of cracks is selected at the beginning of the perforation process and then remains stable. A simple model predicts the number of cracks as the result of a competition between the el...

We report on the experimental realization of using super-aligned carbon nanotubes (SACNTs) as etching masks for the fabrication of large area nanoscale metal meshes. This method can easily be extended to different metals on both rigid and flexible substrates. The as-fabricated metal meshes, including the ones made of gold, copper, and aluminum, are suitable for use as transparent conductive lay...

Accumulative roll bonding is an advanced manufacturing process, which capable of simultaneously refining the grain size into nanometer regime and different metallic sheet materials. Herein, homogenous aluminum/aluminum as well heterogeneous aluminum/steel laminated metal composite (LMCs) are fabricated. The residual stresses experimentally determined by X-ray diffraction hole-drilling method. G...