x-ray diffraction peak profile analysis was used to identify changes in the lattice distortions during isothermal aging of fe-10ni-7mn (wt. %) maraging steel. integral peak breadths were analyzed using classical williamson-hall equation taking the elastic anisotropy into account. it was found that substantial lattice distortions rise during precipitation hardening which depend strongly on the s...

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 stee...

The paper proposes the use of maps expected abrasive wear friction surface a soil-cutting part, which characterize intensity at various points during its movement in soil environment. importance this work is caused by changes modern technologies for cultivation agricultural crops, requiring geometric shapes parts with need to predict their service life. A study physical and mechanical propertie...

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...

Al-Mg alloys are normally prone to lose part of their yield and tensile strength at high temperatures due insufficient thermal stability the microstructure. Here, we present a Ca-modified Al–Mg–Sc alloy demonstrating elevated temperatures. The microstructure contains Al4Ca phases distributed as network along grain boundary Al3(Sc,Zr) nano-particles dispersed within grains. evolution age-hardeni...

in order to study the signs of œstrus in the west african dwarf goat, 28 non pregnant females younger than 24 months of age were used. most of them (94.7%) had waggled the tail during heat. the frequency of micturition was higher in the presence of the male. the swelling of the vulva was observed in 68.4% of goats in heat. the cervico-vaginal mucus was significantly (p≤0.05) abundant and elasti...

Abstract The load carrying capacity of gears can be significantly increased by nitriding. However, the required nitriding hardening depth depends on stress level and gear size. In order to achive a high fatigue resistance durability nitrided an adequate is necessary. industrial practice, (NHD) about 0.6 mm currently regarded as upper limit that reached within reasonable time cost. This also lim...

The effect of oxygen content on the microstructure and mechanical properties of the Ti-29mass%Nb-13mass%Ta-4.6mass%Zr (TNTZ) alloy was investigated in this study. The microstructural observation of TNTZ alloys, containing 0.1–0.4mass% oxygen, subjected to solution treatment shows the presence of a single phase. With an increase in oxygen content, the hardness, tensile strength, and Young’s modu...