Abstract The joining process of bainitic rails is significant in terms their industrialization high-speed and heavy-loaded railways. This paper demonstrates the microstructure changes critical zone welded joint, which responsible for greatest deterioration mechanical properties. Extensive progress decomposition retained austenite ferrite occurs low-temperature heat-affected (LTHAZ) flash-butt j...

Optimal hydrocarbon recovery depends strongly on predicting the reservoir quality and drive mechanism, this could be achieved by petrophysical analysis. This research evaluated properties of sands in an Oil producing Field, onshore Niger delta, Nigeria using techniques. Results from Petrophysical evaluation, showed that average porosity values reservoirs ranged between 0.15 0.24 while water sat...

Abstract Solid-state transformation during heat treatment is of great practical importance because it significantly affects the final structure, properties, and thermal stability cast components. The present study highlights issue structure formation its effect on high-quality iron, namely, austempered ductile iron (ADI). In this study, experiments were carried out for castings with a 25-mm-wal...

The sedimentation characteristics of quartz particles affect their separation and settling dehydration processes. Particle morphology determines the equilibrium velocity. In this paper, a single particle is characterized by employing experimental CFD-DEM approaches. SEM served to examine measuring 30–500 μm, they exhibited flaky–blocky morphologies with an average long–middle axis ratio 1.6. Co...

In gas turbine engines, sections are exposed to high temperature and loads during operation therefore inlet boundary is considered the most challenging for turbomachines. Ni-based super-alloys used materials in engines because of their superior mechanical characteristics at temperatures. this research, two Mar M-247 polycrystalline cast rotors, which were operated non-operated turbojet engine t...

Abstract The effects of Mo content on the microstructure and solidification path gas tungsten arc welding deposited Nb-bearing nickel-based alloy wire were studied. entered matrix γ phase as a solid solution was precipitated in form eutectic phases including Laves, σ, MC carbides. In Ni-30Cr weld metal, plays leading role σ formation, while relatively minor carbides Laves formation compared wit...

In this study, we used 0.2C-1.7Si-1.9Mn wt% cold-rolled sheet as the experimental material to prepare Q&P sample with blocky microstructures and QQ&P lath-shaped through processes, respectively. The partitioning behavior of carbon manganese in two samples after intercritical annealing were studied. During annealing, occurred, resulting contents being significantly higher than those ferr...

Airborne light detection and ranging (LiDAR) unmanned aerial vehicle-structure from motion (UAV-SfM) provide point clouds with unprecedented resolution accuracy that are well suited for the digital characterization of rock outcrops where direct contact measurements cannot be obtained due to terrain or safety constraints. Today, however, how better apply these techniques practice geostructural a...