Usually, scraps of X22CrMoV12-1 alloy are obtained through machining steam turbine blades and recycled casting. However, this process is considered too costly. The viability recycling with addition vanadium carbide (VC) powder metallurgy was analyzed in study. Scraps VC were milled a planetary ball mill during 10, 30 60 hours. granulometry the determined laser granulometry. evolution particles ...

An electron microprobe is an electron microscope designed for the non-destructive x-ray microanalysis and imaging of solid materials. It is essentially a hybrid instrument combining the capabilities of both the scanning electron microscope (SEM) and an x-ray fluorescence spectrometer (XRF), with the added features of fine-spot focusing (~ 1 micrometer), optical microscope imaging, and precision...

The microstructure of the hypereutectic Fe-Cr-C alloy is observed by optical microscopy (OM). The initial growth morphology, the crystallographic structure, the semi-molten morphology and the stacking faults of the primary M7C3 carbide are observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The in-suit growth process of the primary M7C3 carbide was observe...

The measurement of features from the microand precision manufacturing industries requires low uncertainties and nano-scale resolution. These are best delivered through ultra precise co-ordinate measuring machines (CMMs). However, current CMMs are often restricted by the relatively large and insensitive probes used. This paper focuses on the assembly challenges of a novel micro-CMM probe. The pr...

Mechanical alloying is a powder metallurgy processing technique involving cold welding, fracturing, and rewelding of powder particles in a high-energy ball mill. In this work, NiFe-TiC composite powders were prepared by mechanical alloying process using planetary high-energy ball mill. The effect of TiC addition by weight percent on the NiFe solid solution formation, grain size, lattice paramet...

The scanning electron microscope (SEM) has been used as a powerful tool for providing surface information of micro and nanostructures. In recent years, SEM methods for observing wet samples under atmospheric pressure have been reported by some investigators [1-2]. With these methods, the sample space is separated by a thin transparent membrane from vacuum environment where electron beam is prop...

In this study, investigations were conducted focusing on the WC-8Co cemented carbide. A dry turning test of TC4 titanium alloy with carbide tool treated by pulsed electromagnetic coupling treatment (PEMCT) was conducted. Tool wear observed and analyzed using a scanning electron microscope (SEM) energy dispersive X-ray spectrometer (EDS). The thermal conductivity before after PEMCT measured Hotd...

The current work investigates the erosion-corrosion behaviour of thermally sprayed tungsten carbide-10% nickel (WC-10% Ni) coatings placed on AA6061 aluminum alloy. alloy was coated with carbide –10% utilising a high-velocityoxy-fuel (HVOF) spray method. microstructure and hardness were examined using scanning electron microscope (SEM) Vickers tester. slurry wear tests carried out by varying pa...

orpiment, getchellite and stibnite from zarshuran deposit, nw iran, exhibit extensive as-sb substitution. there are four known minerals along as2s3-sb2s3 join, i.e. orpiment (as2s3), wakabayashilite [(as,sb)20s30], getchellite (assbs3) and stibnite (sb2s3). extensive mineralogical studies by scanning electron microscope (sem) and electron probe micro-analyzer (epma) indicate that getchellite fr...