An Investigation on the Microstructure and Mechanical Properties of Spray-deposited Al-8.5Fe-1.3V-1.7Si Alloy
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Spray forming
Tensile testing
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In this study, 8009 heat resistant aluminum alloy was synthesized by the spray atomization and deposition technique. The microstructure and mechanical properties of the alloy were studied using transmission electron microscopy, X-ray diffraction, and tensile tests. The secondary phases in the microstructure of the spray-deposited alloy were examined. The tensile test results indicate that the spray-deposited 8009 alloy both at room and elevated temperature displays superior tensile strength due to the presence of the thermally stable Al 12 (Fe,V) 3 Si particles.
Tensile testing
Spray forming
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Spray forming
Ductility (Earth science)
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Study of Microstructure and Mechanical Properties of Extrued Spray Forming Al-8.5Fe-1.3V-1.7Si Alloy
In this paper, the Al-8.5Fe-1.3V-1.7Si alloys were fabricated by spray forming and extrusion process. The microstructure and mechanical properties of the alloy were investigated by means of metallographic, scanning electron microscope and tensile test. The results indicate that the tensile strength of the extrued alloys can reach 353MPa, the yield strength 300MPa, elongation 19.12%, at room temperature. At 250°C, the tensile strength of the extrued alloys can reach 221MPa, the yield strength 208MPa, elongation 13.33%.
Elongation
Spray forming
Tensile testing
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In this study, Mg-6.8Gd-4.5Y-0.5Zr alloy was fabricated by the spray atomization and deposition technique. The microstructure and mechanical properties of the alloy were studied using optical microscopy, scanning/transmission electron microscopy, X-ray diffraction, and tensile tests. The secondary phases in the microstructure of the spray-deposited alloy were examined. The tensile test results indicate that the spray-deposited Mg-6.8Gd-4.5Y-0.5Zr alloy displays superior tensile strength due to grain refinement and the presence of precipitating strengthening phases.
Tensile testing
6063 aluminium alloy
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A manual electric arc furnace and water-cooled copper mould were used to prepare Ni-Cr-Fe-Nb based alloy.The microstructure of the alloy as-cast was examined by XRD, SEM, TEM and etc. The mechanical properties of the alloy as-cast were tested. The results show that: as-cast alloy is amorphous/nanocrystalline material. The precipitation in grain is fine and the average grain size is 17.70 nm. The compression and tensile experiment show that the alloy is plastic material. The work hardening is found during the compression experiment and the tensile fracture characteristics conform to the ductile fracture mechanism.
Nanocrystalline material
Work hardening
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ABSTRACT In the present paper the influence of solution temperature 450–550°C on microstructure and mechanical properties of cast Al-12%-0.3% Mg and Al-16%-0.3% Mg alloys has been reported. It was observed that an increase in solution temperature increased the tensile strength of all alloys under investigation. Ductility was adversely affected. Higher solution temperature produced better refinement and distribution of eutectic silicon crystals than a low temperature. Heat treatment of all alloys showed spheroidization of eutectic silicon crystals. Scanning electron microscopy (SEM) of tensile-fractured surfaces was carried out to investigate the influence of solution temperature on the mode of fracture.
Ductility (Earth science)
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Mg-5.6Li-3.37Al-1.68Zn-1.14Ce alloy was prepared using vacuum induction melting furnace. The microstructure and phases compostion of as-cast and as-extruded alloys were investigated by optical microscopy, energy dispersive X-ray spectroscopy, scanning electron mocroscopy and X-ray diffraction. The mechanical properties of these alloys were measured with tensile tester. The results indicate that the as-cast alloy is composed of a(Mg) phase and rod-like Al2Ce compound. Al2Ce has the refining effect on the microstructure of alloy. During the extrusion at 523K, dynamic recrystallization happens in the alloy. The dynamic recrystallization refines the grain size of alloy obviously. The phases are refined clearly after extrusion deformation, and the strength and ductility of the alloy are increased accordingly.
Recrystallization (geology)
Ductility (Earth science)
Dynamic Recrystallization
Energy-dispersive X-ray spectroscopy
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A near-α high temperature titanium alloy, Ti-6Al-2.5Sn-4Zr-0.7Mo-0.30Si, was produced with various Y contents from 0 to 0.7wt% by arc-melting technique to study the influence of Y on its microstructure and mechanical properties. It was found that small amount of Y obviously refines the grain size of Ti-6Al-2.5Sn-4Zr-0.7Mo-0.30Si alloy. SEM and TEM observations revealed that Y-containing phase precipitated at the β grain boundary in the form of Y2O3 particles. Hardness and compression tests performed at room temperature revealed the strengthening effect of Y.
Titanium alloy
Arc melting
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The tensile test,OM(optical microscopy),SEM(scanning electron microscopy) and TEM(transmission electron microscopy) were employed to research the effect of Zr on the microstructure and mechanical properties of Al-Zn-Mg-Cu alloy.The results show that the addition of Zr could refine the as-annealed microstructure of alloy and inhibit the recrystallization during deformation progress and heat treatment.It also promotes the segregation of uniform dispersoids in the α-Al.The combined properties of alloy are obviously increased.
Recrystallization (geology)
Zirconium alloy
Tensile testing
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The high temperature tensile behaviour of the A354 casting aluminum alloy was investigated also evaluating the influence of secondary dendrite arm spacing (SDAS). Cast specimens were produced through a gradient solidification equipment, obtaining two different classes of SDAS, namely 20-25 µm (fine microstructure) and 40-50 µm (coarse microstructure). After hot isostatic pressing and T6 heat treatment, the samples underwent mechanical characterization both at room and high temperature (200 °C). Results of tensile tests and hardness measurements were related to the microstructural features and fractographic characterization, in order to investigate the effect of microstructure and high temperature exposure on the mechanical behaviour of the alloy.
Dendrite (mathematics)
Temperature Gradient
Characterization
Hot isostatic pressing
Tensile testing
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