Application of optical and acoustic methods for estimation of fatigue damage

The results of the investigation of variations in the parameters of elastic wave propagation and microplastic characteristics of steels 12 (12GS) and (08Kh18N10T) during their fatigue damage are given. The characteristics of microplastic deformations (density of microzones subjected to plastic deformations and average value of microplastic deformations) are determined using an optical method with a help of a portable SPECTR-MET metallograpic complex. Attenuation and propagation velocities of bulk transverse and longitudinal elastic waves are shown to be sensitive to structural variations at an earlier stage of alloy damage. The degree of damage to the analyzed materials before formation of a macrocrack is estimated using a combination of an acoustic and an optical method of nondestructive testing.     

Use of Quartz-Containing Materials as Fluxes in Copper Smelting Production

Metallurgist - Using x-ray phase, chemical, and thermal (20–1200°C) analysis methods, phase composition and thermal properties are evaluated for three specimens of quartz-containing...     

X-ray Photoelectron Spectra of La1 – xCaxCr1 – yMyO3 (M = Mn, Fe, Ni, Cu) Perovskite Oxides

X-ray photoelectron spectroscopy was used to identify the oxidation states of ions in La_{1 – x} Ca _x Cr_{1 – y} M _y O₃ (M = Mn, Fe, Ni, Cu) perovskite oxides, to determine the surface composition of the samples, and to assess the effect of B-site substitutions on the electronic spectrum of the chromites. The binding energies of the La 4d, Ca 2p, Mn 2p, Ni 2p, Cr 2p, and O 1s core levels were determined, and the effect of the dopant on the shape of the La 4d and O 1s peaks was analyzed.