The b-Al5FeSi intermetallic phase and coarse Mg2Si particles have negative effects on extrudability and workability of 6xxx Al alloys billets. To achieve extruded products with a high surface quality, the as-cast billets are heat-treated before extrusion. During heat treatment, the undesired intermetallic particles, i.e., b-AlFeSi platelets are transformed to rounded a-Al(FeMn)Si intermetallic ...

Multilayered Al/Cu/Fe thin films have been deposited by magnetron sputtering onto Si and Al2O3 substrates with a nominal global composition corresponding to the quasicrystalline phase, 5:2:1. Subsequent annealing was performed on samples up to 710 °C. It is found that when using Si as substrate a film-substrate reaction occurs already below 390 °C, where Si diffuses into the film. This changes ...

The study of liquid metal embrittlement in Fe–Zn systems is challenging because the high temperature and vapor pressure Zn, which hinders in-situ investigations with sufficiently spatial resolution. This typically associated subsecond processing steps coexistence a solid substrate Zn phase, renders direct observations at microstructural scale difficult. In this study, we comprehensively investi...

Raney catalysts were prepared by a combination of mechanical alloying and leaching as an alternative in the synthesis of Raney-Nickel catalysts. Binary Al-Ni and ternary Al-Ni-Fe alloys with nominal compositions Al65Ni35, Al75Ni25, Al65Ni30Fe5, Al75Ni20Fe5 (in atomic percent), were processed from pure elemental powders; they consisted mainly of the intermetallic B2 AlNi phase. Aluminum was sele...

A5052 aluminum alloy and SPCC steel plates were welded using magnetic pulse welding, interfacial microstructure strength of the lap joint examined. The used for a flyer plate parent plate, respectively. Charging energy stored in capacitor gap between changed. Microstructure was examined by an optical microscope, scanning electron microscope transmission microscope. Tensile-shear test evaluating...

We report detailed chemical abundance analysis of 27 RGB stars towards the Galactic bulge in Baade’s Window for elements produced by massive stars: O, Na, Mg, Al, Si, Ca and Ti. All of these elements are overabundant in the bulge relative to the disk, indicating that the bulge is enhanced in Type II supernova ejecta and most likely formed more rapidly than the disk. Our [Mg/Fe] ratios, confirme...

Phase transitions in the Co-rich part of Co–Al–Nb–Mo phase diagram are studied by energy dispersive spectroscopy (EDS), X-ray analysis, transmission electron microscopy (TEM), and differential scanning calorimetry (DSC) measurements. The obtained results were compared with for alloys binary Co–Al ternary Co–Al–Nb, Co–Al–Mo systems. Formation intermetallic L12 structure was found a range 10 at.%...