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The incorporation of low density, high modulus ceramic particles into a steel matrix is a potential route to improve the mechanical performance of steels. A powder metallurgy, mechanical blending route has been adopted to produce a homogeneous distribution of TiB2 particles in a 316L stainless steel matrix. The resulting composite showed large increases in both the compression and the tensile strength when compared to the unreinforced alloy. The compression strength was measured under both quasistatic and dynamic conditions. Tensile strength was measured only under quasistatic conditions. Dynamic compression tests were performed at temperatures of 200 and 400 °C. Metallographic investigations have been performed on the specimen in the initial status and after a deformation. Fracture surfaces were studied in a scanning electron microscope to allow more detailed assessment of fracture mechanisms. [ABSTRACT FROM AUTHOR]

Increase of Internet traffic and introduction of triple-play services force operators to increase network capacity at moderate costs. Introduction of higher electronic time-division multiplexing (ETDM) channel bit rate targets reduce the cost per bit for the transmission due to lower power consumption, smaller footprint, less management effort, and complexity of the systems. Improved performance of electronic and optoelectronic components allows for research on ETDM bit rates beyond 40 Gb/s, which is currently the highest standardized channel bit rate for optical telecommunication networks. In this paper, an overview of recent progress in high-speed ETDM technology for 80 Gb/s and beyond and results of high-speed ETDM transmission experiments are given. Currently, the speed of electronics enables ETDM systems with line rates of 80/85 Gb/s and even 100 Gb/s, which is expected to be the next generation of Ethernet in data communication [ABSTRACT FROM PUBLISHER]

This paper reports on the field transmission of N×170-Gb/s over high-loss fiber links using third-order distributed Raman amplification (DRA) in a commercially operated network of Deutsche Telekom. It gives an overview of the key technologies applied for the realization of an 8 × 170 Gb/s (1.28 Tb/s) dense wavelength division multiplexing (DWDM) system demonstrator and summarizes long-haul transmission experiments with terabit-per-second capacity over European fiber infrastructure. Third-order DRA enabled repeaterless transmission of 1 × 170 Gb/s and 8 × 170 Gb/s over links of 185- and 140-km field fiber, respectively. Including an additional 25 km of lumped standard single-mode fiber (SSMF) at the end of the span, a total loss of 61 and 44 dB, respectively, was bridged. [ABSTRACT FROM PUBLISHER]