Magnesium Reinforced with Inconel 718 Particles Prepared Ex Situ—Microstructure and Properties

Abstract

Magnesium samples reinforced with 0.7, 1.4, and 2.4 vol.% of Inconel 718 particles were prepared using a disintegrated melt deposition technique followed by hot extrusion. Mechanical properties, thermal expansion, and damping were studied with the aim of revealing the particle influence on the microstructure, texture, tensile and compressive behavior, thermal expansion coefficient, and internal friction. The flow stresses are significantly influenced by the test temperature and the vol.% of particles. A substantial asymmetry in the tensile and compressive properties was observed at lower temperatures. This asymmetry is caused by different deformation mechanisms operating in tension and compression. The fiber texture of extruded composite samples, refined grain sizes, and the increased dislocation density improved the mechanical properties. On the other hand, a decrease in the thermal expansion coefficient and internal friction was observed.

Functionally graded AZ91/WC nanocomposite fabricated via friction stir processing using a novel way

“…Therefore, the improvement in the hardness values could be related to the combination of refinement of the α-Mg grain size caused by the dynamic recrystallization via FSP along with the pinning effect of WC nanoparticles. The variation in the thermal expansion coefficients between different materials, such as AZ91 Mg alloy (26 x 10 -6 K -1 ) [30] and WC particles (~5.5x10 -6 K -1 ) [31], results in an increment in the dislocation density [32]. S. Graça et al [33] showed that the increase in the dislocation density created a hindrance to deformation resulting in an increase in the hardness.…”

Mechanical and Microstructural Behavior of Sintered NiAl-Based High Entropy Alloy

“…With the strong bond between Nickel and Aluminium at an elevated temperature, NiAl can efficiently contend with ceramics or superalloys due to its remarkable characteristics at high temperatures and good strength. In comparison to the traditional nickel-based superalloys, the NiAl-based alloy has demonstrated better thermomechanical characteristics and good corrosion, wear, and creep resistance [1][2][3][4][5][6]. A recent study has focused on Nickel-Aluminide, an intermetallics; comprising Aluminium and Nickel.…”

Optimization of process parameters for the development of Ni–Al-Ti-Mn-Co-Fe–Cr high entropy alloy system via spark plasma sintering

“…This bond has generated outstanding properties at an extreme temperature and good strength that could effectively compete with superalloys and ceramics. The NiAl-based alloy has shown superior thermomechanical properties, excellent corrosion, wear, and creep resistance compared to the conventional nickel-based superalloys [1][2][3][4][5][6]. Nickel-aluminide is an intermetallic compound containing aluminium and nickel and has been the focus of recent researchers.…”