The design of the dissimilar metal weld investigated here is aimed at applications in steam generator a sodium-cooled nuclear reactor, with multi-decade lifespan demanding operational conditions. It consists narrow-gap joint between 2.25Cr-1Mo low-alloy steel and an austenitic alloy using nickel-based 82 as filler material. This study focuses on understanding microstructural micromechanical evo...

Alloy 718 is a unique superalloy that has been in use for a number of years. It also has the distinction to be utilized throughout the aerospace and general industrial communities. The applications for this material are often very unique and require tailoring of the microstructure and subsequently the mechanical properties to meet these specific needs. To support optimization of Alloy 718 mecha...

Intermetallic γ' precipitates typically strengthen nickel-based superalloys. The shape, size and spatial distribution of strengthening precipitates critically influence alloy strength, while their temporal evolution characteristics determine the high-temperature alloy stability. Combined ultra-small-, small- and wide-angle X-ray scattering (USAXS-SAXS-WAXS) analysis can be used to evaluate the ...

We considered possibilities of an application diffractive free-form optics in laser processing metallic materials aerospace production. Based on the solution inverse problem heat conduction, algorithm was developed that calculates spatial distribution power density irradiation order to create required thermal effect materials. It found use for beam shaping made it possible obtain specified prop...

The influence of nickel as minority alloying element on the corrosion behavior amorphous alloys (Al74Cu16Mg10)99Ni, (Al74Cu16Mg10)98Ni2 and (Al74Cu16Mg10)97Ni3 was investigated. were obtained ribbons by Chill Block Melt Spinning (CBMS). structure proven X-ray diffraction (XRD) transmission electron microscopy (TEM). rate calculated gravimetric using continuous immersion tests for 360 hours in 3...

The effects of the modification a high-?' Ni-8.5Cr-5.5Al-1Ti (wt.%) model superalloy with 0.5 wt.% Y2O3, manufactured by laser powder-bed fusion, on microstructure and compressive creep resistance were investigated. Compared to base alloy, oxide-dispersion strengthened (ODS) alloy exhibits 8-10 times slower rates at 800 °C, over wide range stresses (35-250 MPa). Two regimes observed: diffusiona...

This study aimed at comparing amounts of nickel (Ni) and chromium (Cr) released from brackets from different manufacturers in simulated oral environments. 280 brackets were equally divided into 7 groups according to manufacturer. 6 groups of brackets were stainless steel, and 1 group of brackets was made of a cobalt-chromium alloy with low Ni content (0.5%). International standard ISO 10271/200...