Fe-Cr-C-T-Al flux-cored wire surfacing was performed by laser, arc and hybrid methods. Laboratory tests have shown that the deposited layers vary greatly in terms of wear resistance. To identify reasons, studies were carried out using metallographic, X-ray structural durometric The analysis research results showed reason is difference cooling rates metal range 1100-800 K. This leads to possibil...

In this work the effects of various methods of agitation on the properties of electroless Ni-P-MoS2 composite coatings were investigated. Magnetic stirring as well as purging the solution with gas (Air, Oxygen, Nitrogen) were used. Plating rate, chemical composition, MoS2 distribution, and hardness of the deposit were measured. Topography of coating was studied with metallography and scanning e...

A comprehensive study on Sn macrosegregation behavior in ternary Al-Sn-Cu alloys was carried out by comparative analysis between gravity casting and squeeze samples. The microstructure distribution of the castings were characterized metallography, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, a direct reading spectrometer. Results show that there are obvious di...

in this paper, the evidences and remnants of archaeometallurgical activities in elamite site of haft tappeh (14th century bc) have investigated and identification of archaeometallurgical materials have been done based on analytical investigations. sem-eds analysis and metallography were used to identify the chemical composition and microstructural features of archaeometallurgical materials in h...

in this investigation, continuous cooling transformations and microstructures have been studied in detail in a low carbon ti-nb bearing microalloyed steel by means of dilatometry, metallography and hardness measurements. the results indicate that when the cooling rate is greater than 1˚c/s, the dilatation curve is associated with a major dilatation at relatively low transformation temperatures,...

High-silicon spheroidal graphite (SG) irons present higher changes of density during the solidification process when compared to normal SG irons. This special behavior is particularly significant in last stages solidification, where expansion may become insufficient compensate contraction austenite and risk microporosity formation increases. The goal this laboratory research was establish corre...

Abstract A new application of a centerless x-ray diffractometer was proposed that goes beyond residual stress measurements during the regular operation such equipment. During depth measurement, it is possible to fit measured interference function ferrite (211) with different number curves as depth. The corresponded appearance fractions grain sizes and concentrations in ferrite, perlite, bainite...

The term San Mai is used for the manufacture of knife blades consisting three layered steel composites. middle layer, which forms cutting edge, consists hard and on outside a soft stainless forged. Mr. Benjamin Kamon, an Austrian blacksmith, provided examined sample. Three different steels thin Ni layer are symmetrically connected (1.4301/1.3520/Ni/1.2519/Ni/1.3520/1.4301). cold work (1.2519) t...

Abstract During the operation of a boiler in power plant, water wall tube burst and leaked. In order to find out reason rupture, comprehensive experimental study was made on sample with macro morphology, chemical composition, metallography, SEM EDS. The results show that due high sulfur content combustion medium boiler, large amount sulfate containing elements will deposit outer during long-ter...