the microstructure of hp stainless steel in aged and aged + solution annealed conditions and solutionized alloy 800 was characterized by optical microscopy, scanning electron microscopy (sem), and transmission electron microscopy (tem) equipped by eds. all phases present in the above condition were described. the effects of solution annealing heat treatment temperature on the microstructure, te...

The microstructure of HP stainless steel in aged and aged + solution annealed conditions and solutionized alloy 800 was characterized by optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) equipped by EDS. All phases present in the above condition were described. The effects of solution annealing heat treatment temperature on the microstructure, te...

Under the excitation of geomagnetic field, normal component of surface scattering magnetic field intensity Hp(y) changes of steel tensile samples with different stress concentration factors α were studied. Constant amplitude sinusoidal tensile load cycles were applied on 18CrNi4A steel plate samples whose α were respectively 1, 3 and 5. Then the correlation of Hp(y) value changes with loading c...

The article reflects the results of many years’ (since 1972) research of structural, hydrodynamic, thermophysical and mechanical properties of metal felt capillary structures (MFCS) of heat pipes (HP). These structures were made from the discrete copper, stainless steel, or nickel sintered fibres of 0.002 to 0.01-m length and diameter within 20 to 70 μm. They were intended for the HP with shell...

in this study, the changes in microstructure of hp-nb cast heat resistant steel after 8 years of service at high temperatures were investigated. study of microstructure using optical microscopy (om) and scanning electron microscopy (sem) equipped with an energy dispersive spectrometry (eds) showed that the microstructure of this steel in as-cast condition includes an austenitic matrix, and that...

in the present study, the mechanical properties and fracture mechanisms of two powder metallurgy low alloy steels, i.e. distaloy dh and distaloy hp, were investigated. all samples were sintered at 1120 ºc for 30 min in n2/h2 atmosphere. for evaluation of the effect of cooling rate on final properties, samples were cooled from sintering temperature with two different cooling rates. in addition, ...

In this study, thermal fatigue properties of 400 series ferritic stainless steels have been evaluated in the temperature ranges of 200-800C and 200-900C. Systematic methods for control of temperatures within the predetermined range and measurement of load applied to specimens as a function of temperature during thermal cycles have been established. Thermal fatigue tests were conducted under ful...

BACKGROUND Surfaces in congregate settings, such as vehicles used for mass transportation, can become contaminated with infectious microorganisms and facilitate disease transmission. We disinfected surfaces contaminated with H1N1 influenza viruses using hydrogen peroxide (HP) vapor at concentrations below 100 ppm and triethylene glycol (TEG)-saturated air containing 2 ppm of TEG at 25 degrees C...

We describe the application of a Perfectly Matched Layer (PML) combined with a self-adaptive goal-oriented hp Finite Element (FE) method to the simulation of resistivity measurements. The adaptive refinements and fast convergence of the self-adaptive hp FE method enhance the performance of the PML and, thus, enable the accurate and efficient truncation of the computational domain in open domain...