The impact of carrier pulling on the modulation characteristics of a transistor laser is discussed. The results of a theoretical analysis of modulation bandwidth and damping effect show that the carrier transport effect obtained by using a transistor laser allows for a gain compression factor of about one-tenth that of a conventional laser (0.7×1017 cm3), as well as for a maximum modulation ban...

The role of microstructure on hot deformation behavior of sintered Cu-28Zn prealloyed powder compacts was investigated by a series of isothermal hot compression tests in the temperature range of 550- 850°C at strain rates of 0.001, 0.01, 0.1 and 0.5 s-1, by taking into consideration the Hyperbolic Sine functional behavior to analyze the deformation behavior of the alloy. The results indicate th...

Titanium alloys exhibit mechanical and physical properties that fit structural applications demanding light-weight, corrosion resistance and biocompatibility. Ceramic reinforcements can further improve some of these mechanical properties, such as wear resistance, specific stiffness and specific strength. In comparison to continuous reinforced titanium alloys, the particle reinforced alloys (PRT...

Phenomenological approach to the description of deformation resistance behaviour of steel and its microstructure development under the service hot rolling condition is still the most common useful and powerful. Utilising different experimental equipment such as torsion plastometer [1-5], compression plastometer [6-9], or advanced laboratory mills [10, 11] as well as different deformation techni...

due to the great variety of applications of magnesium alloys with superior mechanical properties, recent studies have been focused on the hot deformation behavior and microstructure of magnesium alloy castings. although there have been several recent investigations on the microstructure of wrought magnesium alloys after hot deformation, a limited number of studies have been conducted with regar...

This paper models hot compression testing using a dilatometer in loading mode. These small-scale tests provide high throughput at low cost, but are susceptible to inhomogeneity due friction and temperature gradients. A novel method is presented for correcting the true stress-strain constitutive response over full range of temperatures, strain-rates strain. The nominal from used predict offset c...

[1] During the Saturn orbit insertion (SOI) fly-through of the Cassini spacecraft, Saturn’s magnetosphere underwent a significant corotating interaction region (CIR) related compression. Such compressions have recently been suggested to produce rapid bursts of tail reconnection, enhanced Saturn kilometric radiation (SKR), and consequent auroral dynamics. On the outbound pass the spacecraft beca...

In this study, the flow behavior of a novel high entropy alloy, (FeNi)67Cr15Mn10Al5Ti3, was investigated through isothermal compression performed at temperature range 980–1100 °C using strain rates 0.01 s?1 and 0.1 s?1. The alloy mainly composed face-centered cubic (FCC) phase small amount body-centered (BCC) phase. During deformation, exhibited typical single-peak type curve all testing condit...