whereas in electrical discharge machining (edm) the heat flux entering the workpiece is extremely high, the fourier heat conduction model may fails. this article reports on determination of temperature distribution in the workpiece due to edm using non-fourier heat conduction model. equations are solved by deriving the numerical solution. the temperature layers and profiles of sample calculatio...

in this study, the preparation of transparent glass-ceramics with lithium-mica nanocrystals by melting-quenching method was investigated. the effect of heat treatment time and temperature on the crystalline phases, microstructure and transparency of the samples were studied. in order to obtain a fine microstructure, an optimum condition for heat treatment has been found to be very important in ...

in this experiment six healthy adult dairy jersey cattles and eight calves (aged 4-6 months) were selected to measure temperature of different body skin sites, rectal temperature, respiration and heart rates during summer and winter. body sites maximum and minimum temperature in calves during summer belonged to the ear, forehead, right flank, abdomen (38.4-38.9 ˚c) and carpus (32 ˚c). this was ...

the objectives in the cold rolling process include improved sheet surface quality, enhanced steel mechanical strength, and better solidification operations. given the increasing demand for higher steel surface quality, more rapid production, and thinner steel plates, more attention has been directed toward the parameter of temperature in cold rolling as a means of achieving the above objectives...

Heat treatment is often used for improve the dimensional stability of wood. In this study, effect of heat treatment on equilibrium moisture content (EMC) of oak (Quercus petraea Lieb.), chestnut (Castanea sativa Mill.), calabrian pine (Pinus brutia Ten.) and black pine (Pinus nigra Arnold.) woods, obtained from Kastamonu Forest Enterprises of Turkey, was examined. Wood specimens were subjected ...

The present experimental investigations deal with the improvement of mechanical properties of cold work tool steels through different heat treatment processes. An attempt was made to get optimal combination of hardness and toughness through changes of microstructure by heat treatment. The toughness of D2 tool steel increases with tempering temperature. The hardness of D2 tool steel decreases wi...

The presence of alloying elements, sometimes in a very small amount, affects mechanical properties one of these elements is Boron. In Aluminum industries, Boron master alloy is widely used as a grain refiner In this research, the production process of Aluminum –Boron master alloy was studied at first then, it was concurrently added to 2024 Aluminum alloy. After rolling and homogenizing the resu...

This paper reports results of in-house experimentation on heat treatment and mechanical testing of H13 tool steel. Heat treatment strategy practiced by the industry is described in detail. Effect of various types of heat treatment on fracture toughness, hardness and other mechanical properties is also analyzed. It was found that toughness (expressed in terms of plane-strain fracture toughness K...

BACKGROUND Heatstroke often leads to multiple organ dysfunction syndrome (MODS) with a death rate of 40% or a neurological morbidity of 30%. These high rates in patients with heatstroke are largely due to the progression of heat stress to MODS, resulting in no specific treatment available. This study aimed to develop a mouse model of heat stress and determine the pathological changes in the lun...

‌‌‌Fatigue behavior of a vanadium microalloy steel has been studied in this research. Here, microstructure constituents were considered which essentially are dependent on the heat treatment conditions. The results of high cycle fatigue tests revealed that heat treatment procedure and cooling rates have significant effects on fatigue properties. Optimal heat treatment cycle of the microalloyed s...