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Wen et al. (2011) confirmed that at high ultrasonic vibration energy the hardening effect which decreased the formability dominated and reduced the plasticity of AZ31 magnesium alloy. More seriously, when the ultrasonic exposure time exceeded 1.5 s, excessive friction occurred between the solidifying part and micro-cavity, causing many black defects on the surface of the parts.

Magnesium: appliions and uses-Metalpedia

Magnesium is the lightest of all light metal alloys and therefore is an excellent choice for engineering appliions when weight is a critical design element. It is strong, has good heat dissipation, good damping and is readily available. Its properties make it easy to

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Effect of SiC Nanoparticles on Hot Deformation Behavior …

The nano-SiCp/AZ91 composites (CN) have been prepared by the coination of ultrasonic vibration and semisolid stirring as described in detail in []. For the first step, AZ91 magnesium alloy was melted at 720 C in an electrical resistance furnace with a 2 /SF 6

Semisolid rheoforming of magnesium alloys: A review - …

Still, this direct ultrasonic vibration (DUV) is to prepare the Al alloy slurry by immersing the Ti alloy horn into the melt, which inevitably brings about the horn corrosion. To avoid this problem, Lü et al. [[105], [106], [107]] developed an indirect ultrasonic vibration.

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Spawned by growing interest in ultrasonic technology and new developments in ultrasonic melt processing, the Second Edition of Ultrasonic Treatment of Light Alloy Melts discusses use of ultrasonic melt treatment in direct-chill casting, shape casting, rapid solidifiion, zone refining, and more, exploring the effects of power ultrasound on melt degassing, filtration, and refinement in

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Basic Information on Cerasolzer Active Alloy

The Cerasolzer active-solder alloy together with an ultrasonic activated soldering system enables to solder on ‘hard-to-solder’ materials flux free Top 2. Adhesive Mechanism Although it is quite difficult to completely explain the mechanism of how Cerasolzer

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Degassing of Aluminum Alloys Using Ultrasonic …

Ultrasonic vibration was injected from the top of the melt. 10 Fig. 4.2. Vacuum chaer used for vacuum degassing with the assistance of ultrasonic vibration. In order to determine the mechanism of argon degassing when coined with ultrasonic vibration

Grain refiner breakthrough for magnesium alloys

Scientists at Brunel University London have perfected the first ever grain refiner master alloy for magnesium-aluminium alloys. A team led by Dr Hari Babu Nadendla from the Brunel Centres for

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Ultrasonic welding of titanium alloy TiAl6V4 to …

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What is the Best Material to Reduce Vibration? - …

4/2/2015· A vibration-reducing material is most frequently used in industrial environments—those environments in which excessive vibrations can be damaging. A vibration-reducing material outwardly disperses the energy caused by vibrations, by reducing the amplitude and frequency of the vibrational waves, usually in the form of thermal energy.

Effects of Ultrasonic Power on the Hardness of Aluminum 3003­H18 Alloy

joining one layer on top of another layer with 20 kHz ultrasonic frequen-cy, 14–28 μm vibration amplitude, 800–1500 N normal force, and 25–50 mm/s weld speed with optional heat-ing element (65 –150 C) to facilitate

Qingyou Han''s Professional Profile at Purdue University

J. Song, C. Vian, and Q. Han, “The Influence of Ultrasonic Vibration on the Microstructure of A380 Alloy,” NADCA Transactions, The North American Diecasting Associations, 2011, T11-011. Z.W. Liu and Q. Han, “Appliion of Ultrasonic Vibration in the Synthesis of in situ Particulate Reinforced Aluminum Matrix Composites,” NADCA Transactions, The North American Diecasting Associations

Fundamental studies on ultrasonic cavitation-assisted …

NIRT/GOALI: Fundamental Study of Bulk Magnesium Alloy Matrix Nanocomposites Fabried by Ultrasonic Cavitation Based Solidifiion Processing Xiaochun Li , Roderic S. Lakes , Sindo Kou , Joanna R. Groza , Kenneth P. Gall

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A comparative study between friction stir processing and …

In the current research, a modified method of FSP, entitled friction stir vibration processing (FSVP) was applied to develop a surface composite on AZ91 magnesium alloy. In this method, the workpiece is vibrated normal to processing direction.

Magnesium Elektron UK launches new ultrasonic …

Magnesium Elektron UK began production of magnesium in 1936 at its Manchester, UK, plant and subsequently developed a wide range of magnesium alloy systems and products. The company is part of the Luxfer Group, an international manufacturer of high-performance engineering materials including magnesium alloys, zirconium products and high pressure lightweight gas cylinders.

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Chapter 3 - Alloy Data - Die Casting

Alloy Data 3-2 NADCA Product Specifiion Standards for Die Castings / Section 3 / 2003 The cross reference designa-tions shown are for alloy speci-fiions according to widely recognized sources. Refer-ences apply to the metal in the die cast condition and