Hardening behavior of amorphous alloy Al90RE5Ni5 dispersion by nanoscale α-Al during crystallization
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Microstructures of the bonding area in laser cladded Zr-based amorphous alloy coating on magnesium
2020, Materials Today CommunicationsCitation Excerpt :However, to date, it is still difficult to find a single coating technology capable of providing sufficient protection from corrosion and abrasion for magnesium alloys in harsh service environments. In addition to the intrinsic excellent corrosion resistance and high strength, amorphous alloys can also possess enhanced strength, high stiffness, excellent wear resistance and good plastic strain upon being reinforced with homogeneous or heterogeneous particulates [10–15]. Up to date, a large number of amorphous alloys with great glass forming ability have been found.
Insight on the glass-forming ability of Al-Y-Ni-Ce bulk metallic glass
2015, Journal of Alloys and CompoundsCitation Excerpt :As mentioned above, the amorphous matrix near the nano-sized Al precipitates will be enriched with these foreign atoms due to the low solubility in the fcc Al lattice. It is believed that the remaining amorphous region enriched with foreign atoms can become more stable and further hinder the crystallization reaction [23,24]. After annealing at the second crystallization temperature (Tx2), the crystallization diffraction peaks were those of the Al3Y phase and AlCeNi phase, revealing that a medium range order caused by strong chemical bonds in Al87Y8Ni5 or (Al87Y8Ni5)99Ce1 amorphous alloy is related to the formation of these Al-based intermetallic compounds.
Influence of thermal treatment on structure development and mechanical properties of amorphous Fe<inf>73.5</inf>Cu<inf>1</inf>Nb<inf>3</inf>Si <inf>15.5</inf>B<inf>7</inf> ribbon
2011, Journal of Alloys and CompoundsCitation Excerpt :A homogeneous dispersion of rigid particles free of defects may act as an effective barrier against deformation of the amorphous matrix. The hardening behavior can be dominated by the shear deformation mechanism when Dhkl < δ, where δ is an optimal value [10,11]. In the second stage (Dhkl > δ, T > 873 K) when the hardness of the alloy starts to decrease, the hardening behavior is determined by the dislocation density.
Microstructure and mechanical properties of bulk nanocrystalline Al<inf>88</inf>Mm<inf>5</inf>Ni<inf>5</inf>Fe<inf>2</inf> alloy consolidated at high pressure
2007, IntermetallicsCitation Excerpt :According to the first model, proposed by Zhong et al. [10], the increase of the hardness, as the crystalline volume fraction of α-Al phase increases, is directly related to the hardening of the residual amorphous matrix because of its enrichment in elements different than Al (solute elements), due to the low solubility of these elements in the α-Al phase, which can be considered close to pure Al [17]. The second model, developed by Kim et al. [11], although it was used in a previous work [19], is known as the mixture model. Microhardness of the system would be the average of the value of the residual amorphous matrix and that of the defect-free, and thus very hard, α-Al nanocrystals.
Amorphization and crystallization processes of the ball-milled Al-Y-Fe-TM alloys (TM = Ni, Co, Cu, and Fe)
2006, Journal of Non-Crystalline Solids