Ultrasonic Treatment to Molten FEM©™ Aluminum Alloy and Effects of Ultrasound Treatment Melt Temperature on Hardness

2015 ◽  
Vol 1 (3) ◽  
pp. 12
Author(s):  
Kedar Bhojak ◽  
Alkesh Mavani ◽  
Nilesh Bhatt
Keyword(s):  
Aluminum Alloy ◽  
Ultrasonic Treatment ◽  
Ultrasound Treatment ◽  
Melt Temperature

scholarly journals Investigation of the effect of ultrasonic surface treatment before ion implantation on the structure of the surface layer of aluminum alloy 1201

2020 ◽  
Vol 315 ◽  
pp. 05002
Author(s):  
Viktor Ovchinnikov ◽  
Irina Kurbatova ◽  
Nadezda Uchevatkina
Keyword(s):  
Grain Size ◽  
Surface Layer ◽  
Aluminum Alloy ◽  
Ion Implantation ◽  
Cathode Material ◽  
Surface Treatment ◽  
Ultrasonic Treatment ◽  
Nanocrystalline Structure ◽  
Depth Of Penetration ◽  
Ultrasonic Surface Treatment

The aim of this study was to study the properties of 1201 aluminum alloy after ultrasonic treatment and their evolution during subsequent ion implantation using the monotectic Cu-Pb alloy as the cathode material of the implant. It is shown that during ultrasonic treatment the surface layer of aluminum alloy 1201 undergoes significant changes. A nanocrystalline structure with a grain size of less than 200 microns is formed in it. Ultrasonic treatment of the surface of the target from alloy 1201 before implantation leads to a decrease in the depth of penetration of ions to 160–180 nm and the appearance of amorphization in the implanted layer.

scholarly journals Optimizing the Microstructure and Mechanical Properties of Vacuum Counter-Pressure Casting ZL114A Aluminum Alloy via Ultrasonic Treatment

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4232
Author(s):  
Gang Lu ◽  
Pengpeng Huang ◽  
Qingsong Yan ◽  
Pian Xu ◽  
Fei Pan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Ultrasonic Treatment ◽  
Eutectic Silicon ◽  
Primary Phase ◽  
Pressure Casting ◽  
Counter Pressure ◽  
Casting Aluminum Alloy ◽  
Casting Aluminum

The effect of ultrasonic temperature on density, microstructure and mechanical properties of vacuum counter-pressure casting ZL114A alloy during solidification was investigated by optical microscopy (OM), scanning electron microscope (SEM) and a tensile test. The results show that compared with the traditional vacuum counter-pressure casting aluminum alloy, the primary phase and eutectic silicon of the alloy with ultrasonic treatment has been greatly refined due to the dendrites broken by ultrasonic vibration. However, the refining effect of ultrasonic treatment on vacuum counter-pressure casting aluminum alloy will be significantly affected by ultrasonic temperature. When the ultrasonic temperature increases from 680 °C to 720 °C, the primary phase is gradually refined, and the morphology of eutectic silicon also changes from coarse needle-like flakes to fine short rods. With a further increase in the ultrasonic temperature, the microstructure will coarse again. The tensile strength and elongation of vacuum counter-pressure casting ZL114A alloy increases first and then decreases with the increase of ultrasonic temperature. The optimal mechanical properties were achieved with tensile strength of 327 MPa and the elongation of 5.57% at ultrasonic temperature of 720 °C, which is 6.3% and 8.2%, respectively, higher than that of alloy without ultrasonic treatment.

Changes of Mechanical and Thermal Properties of Cranberries Subjected to Ultrasound Treatment

2017 ◽  
Vol 13 (6) ◽  
Author(s):  
Malgorzata Nowacka ◽  
Aleksandra Fijalkowska ◽  
Artur Wiktor ◽  
Katarzyna Rybak ◽  
Magdalena Dadan ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Ultrasonic Treatment ◽  
Dry Matter ◽  
Sucrose Solution ◽  
Matter Content ◽  
Ultrasound Treatment ◽  
Steviol Glycosides ◽  
Mechanical And Thermal Properties ◽  
Dry Matter Content ◽  
Osmotic Solution

Abstract The aim of the study was to investigate the effect of ultrasound treatment in osmotic solution, carried out at different time and solutions, on mechanical and thermal properties of cranberries. Ultrasound treatment was applied for 30 and 60 min in liquid mediums such as 61.5 % sucrose solution and 30 % sucrose solution with 0.1 % steviol glycosides addition. Before the ultrasound treatment samples were subjected to traditional operations (cutting, blanching). The traditional operations and ultrasonic treatment of whole fruits did not influence or slightly influenced dry matter content and mechanical properties. The cutting had impact on thermal properties to the highest extent due to the exposition of fruits’ flesh. The combination of cutting and sonication decreased thermal conductivity which suggests that mass transfer was more pronounced. The sonication had greater influence when compared to only ultrasonic treatment. Combined both cutting and blanching with ultrasonic treatment led to greater changes in cranberries properties.

Effect of Ultrasonic Field on Centerline Segregation of Cast Aluminum Alloy 7050 Ingots

2011 ◽  
Vol 399-401 ◽  
pp. 66-70 ◽  
Author(s):  
Xiao Qian Li ◽  
Ding Xin Chen ◽  
Ri Peng Jiang
Keyword(s):  
Aluminum Alloy ◽  
Ultrasonic Treatment ◽  
Solid Solubility ◽  
Solidification Process ◽  
Ultrasonic Field ◽  
Cast Aluminum Alloy ◽  
Ultrasonic Power ◽  
Cast Aluminum ◽  
Segregation Index ◽  
Centerline Segregation

By introducing ultrasonic field during the solidification process of aluminum alloy melt, the effects of ultrasonic treatment (UST) on macroscopic and microscopic segregation were investigated. The results show that under 170W of UST, the macrosegregation degree of Zn is diminished to the minimum, the segregation index reaches 0.0583. At a higher ultrasonic intensity, the UST greatly contributes to the positive centerline segregation in the ingot. Compared with conventional casting (without UST), the solid solubility of Zn, Cu and Mg inside crystals of ultrasonic casting can be strengthened so that the microsegregation tends to be minimized. Overall, the ultrasonic cavitation and acoustic stream promote the redistribution of solute elements in the ingots, and a reasonable ultrasonic power is beneficial to weaken the segregation.

scholarly journals Effect of Manufacturing and Absorption Promotion of Lidocaine Hydrogel Using Ultrasonic Waves during Cosmetic Procedures

2021 ◽  
Vol 19 (4) ◽  
pp. 619-626
Author(s):  
Sol-Hui Song ◽  
Hoon Kim
Keyword(s):  
Ultrasonic Treatment ◽  
Hplc Analysis ◽  
Skin Penetration ◽  
Ultrasonic Waves ◽  
Viscosity Measurement ◽  
Ultrasound Treatment ◽  
Skin Permeability ◽  
Gelation Rate ◽  
Ultrasound Parameters ◽  
Permeability Experiment

Purpose: In this study, we study to more effectively use anesthesia products used in beauty procedures following the popularization of anti-aging. Hydrogel, which contains lidocaine, is believed to be more effective in relieving pain if used in cosmetic procedures with ultrasonic waves.Methods: The availability of manufactured hydrogels and commercial gels for ultrasonic treatment was compared, and the effect on skin penetration and skin penetration due to ultrasonic limitations was evaluated based on their applicability. Usability and optimal ultrasound parameters were identified during ultrasound treatment.Results: Viscosity measurement, gelation rate, swelling, skin permeability experiment, and HPLC analysis of manufactured hydrogels all revealed properties, with skin permeability being highest at frequency 1 MHz, cycle low 200, and high 50.Conclusions: Finally, hydrogels containing lidocaine increased skin permeability during ultrasound treatment, allowing for faster targeted transdermal transmission that was more effective depending on the ultrasound parameters. As a result, it is determined that it can be used in cosmetic procedures.

Dynamic Slip Resistance at Metal-on-Metal Interfaces

2006 ◽  
Author(s):  
Fuping Yuan ◽  
Vikas Prakash
Keyword(s):  
Aluminum Alloy ◽  
Molten Metal ◽  
Molten Aluminum ◽  
Metal Films ◽  
Melt Temperature ◽  
Interfacial Conditions ◽  
Slip Resistance ◽  
Metal On Metal ◽  
Shearing Deformation ◽  
Dynamic Slip

In the present study plate-impact pressure-shear friction experiments were employed to investigate dynamic slip resistance and time-resolved growth of molten metal films during dry metal-on-metal slip under extreme interfacial conditions. By employing tribo-pairs comprising hard tool-steel against relatively low melt-point metals such as 7075-T6 aluminum alloy, interfacial friction stress of up to 300 MPa and slip speeds of approximately 250 m/s have been achieved. These relatively extreme interfacial conditions are conducive to the development of molten metal films at the tribo-pair interface. A Lagrangian finite element code is developed to understand the evolution of the thermo-mechanical fields and their relationship to the observed slip response. The code accounts for dynamic effects, heat conduction, contact with friction, and full thermo-mechanical coupling. At temperatures below the melting point the material is described as an isotropic thermally softening elastic-viscoplastic solid. For material elements with temperatures in excess of the melt temperature a purely Newtonian fluid constitutive model is employed. The results of the hybrid experimental-computational study provide new insights into the thermoelastic-plastic interactions during high speed metal-on-metal slip. During the early part of friction slip the coefficient of kinetic friction is observed to decrease with increasing slip velocity. During the later part transition in interfacial slip occurs from dry metal-on-metal sliding to the formation of molten A1 films at the tribo-pair interface. Under these conditions the interfacial resistance approaches the shear strength of the molten aluminum alloy under normal pressures of approximately 1-4.5 GPa and shear strain rates of ~ 107 s-1. It is interesting to note that the dynamic shear resistance of molten metal films decreases from ~100 MPa to ~50 MPa when the initial slip velocities increase from ~100m/s to ~250 m/s. Scanning electron microscopy of the slip surfaces reveal molten aluminum to be smeared on the tribo-pair interface. Photo-micrographs of the cross-section of the 7075-T6 A1 alloy reveals a thin region of severe shearing deformation in close vicinity of the sliding surface. The shearing deformation manifests itself as severely deformed grains in the direction of the sliding.

The strength, fracture, and chemical changes of poly-(p-phenylene benzobisthiazole) after exposure to molten and vapor deposited aluminum

1991 ◽  
Vol 6 (7) ◽  
pp. 1580-1594 ◽  
Author(s):  
K.E. Newman ◽  
P. Zhang ◽  
L.J. Cuddy ◽  
D.L. Allara
Keyword(s):  
Aluminum Alloy ◽  
Photoelectron Spectroscopy ◽  
Molten Aluminum ◽  
Liquid Aluminum ◽  
Polymer Surface ◽  
High Strength ◽  
Melt Temperature ◽  
Silicon Alloy ◽  
Aluminum Silicon Alloy ◽  
Rigid Rod

The tensile properties, fracture behavior, and surface chemical composition of the rigid-rod heterocyclic aromatic polymer fiber poly-(p-phenylene benzobisthiazole), PBT, have been measured as a function of contact with nominally zero valent aluminum overlayers. The samples were produced by immersion of suitable fiber or film specimens in a molten aluminum-12.7 wt. % silicon alloy or by aluminum-vapor deposition followed by heat treatment. The strength of uncoated PBT fiber was 3.0 GPa. After 5 min immersion in the molten aluminum alloy, strengths drop to 80% and 25% of the uncoated fiber values for 600°and 700 °C immersion, respectively. Fiber strengths after aluminum immersion are from zero to 20% lower than the strength for corresponding uncoated fibers heated at an equivalent temperature in argon. Coated fibers exhibit tensile strengths after heating intermediate to similarly heated uncoated or immersed fibers. For all types of samples, the fiber fracture mode changes from fibrillar at failure strengths >1.9 GPa (independent of the environment) to planar at failure strengths <1.9 GPa. X-ray photoelectron spectroscopy of PBT fiber and film surfaces indicates oxidation of the polymer surface has occurred, most likely during fabrication of the fiber or film. The oxygen content of the surface layer is decreased when the film is immersed in molten aluminum-silicon alloy. The lack of corresponding changes in the relative intensities of the polymer C, S, or N photoemission peaks after this immersion suggests that the surface oxidized layer plays some role in protecting the polymer from degradation by molten aluminum. These results strongly suggest that it is possible to fabricate low-density, high-strength PBT/metal composites by liquid aluminum alloy infiltration if the melt temperature is kept below 680 °C and the contact time with molten aluminum kept below 3 min.

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