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Six series of cermet samples with Cr contents between 0 and 12.5 wt.% in 2.5 wt.% increments were prepared by vacuum sintering. The transverse rupture strength (TRS), hardness (HRA) and fracture toughness (K1C) were also measured. It was discovered that the grain size was affected by the Cr content. As the Cr addition increased, the average grain size and aspect ratio of the Mo2FeB2 hard phase decreased,...
NiCoCrAlY coatings were prepared on GH3128 nickel-based superalloy substrates using radio-frequency magnetron sputter deposition. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy measurements showed different particle growth in the thin films after annealing the as-deposited coatings at various heat treatment conditions. In addition, X-ray diffraction data revealed that...
Present work describes a correlation among microstructure, texture, tensile flow and work hardening behavior of alloy 43Ni-29Fe-18W-10Co in as-cast condition prepared by induction melting technique. The microstructure of the alloy exhibit single fcc (γ) phase along with the characteristic dendritic features. The bulk texture of the as-cast alloy displays the presence of triclinic sample symmetry and...
Herein a NiCrBSi coating with 800 μm thickness was fabricated via plasma spraying on AISI 1045 steel, whereupon gas tungsten arc welding (GTA) process was employed to remelt the coating. The microstructure and mechanical properties of the coating before and after remelting were investigated. The results indicate that microstructural inhomogeneity in the as-sprayed coating were almost completely eliminated...
The constitutive behavior of AZ80 M magnesium alloy was investigated by using compression tests performed at the elevated temperature (400–470 °C) and in the semi-solid state containing a small fraction of liquid with different strain rates (0.001–0.1 s−1), and the microstructure evolution was observed. Considering the influence of liquid phase, a more reasonable constitutive model to describe the...
This study examines the effect of different concentrations of Cr and Mn on the microstructure and mechanical properties of Al-10%Mg-0.1%Ti Alloy by using Al-10Cr and Al-10Mn master alloys. The microstructures were studied via the aid of an optical microscope (OM), X-ray diffraction (XRD) and energy dispersive X-ray (EDS) integrated with scanning electron microscopy (SEM). Cr and Mn contents promote...
Microstructure and mechanical properties of extruded Mg–6Zn–xY–0.5Ce–0.4Zr sheets were systematically investigated. Mg–Zn–Ce, I-phase (Mg3Zn6Y) and W-phase (Mg3Zn3Y2) with different morphologies were observed in as-cast and extruded conditions. Numerous nano-precipitates were found along grain boundaries and inside grains in both dynamically recrystallized (DRXed) and unDRXed regions after hot extrusion...
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