Experimental study of the ultrasonic welding effects in the metal joint microstructure

2001 ◽

Author(s):

Samuel Ibekwe ◽

Patrick F. Mensah ◽

Ghanashyam Joshi ◽

Guoqiang Li ◽

Michael Stubblefield

Keyword(s):

Experimental Study ◽

Composite Materials ◽

Statistical Difference ◽

Ultrasonic Welding ◽

Lap Shear ◽

Shear Joint ◽

Strength Characterization

Abstract An experimental study on ultrasonic welding of thermoplastic, which is a prelude to study how the technology can be adapted to join composite materials, was conducted. Three sets of specimen were studied to investigate the influence of energy guide on the bonded specimen. No major statistical difference between the ‘energy guides’ of the tested thermoplastic Celuka™ coupons were noted. Failure of the welded specimen was by shear at the interface. A 75% drop in strength for the bonded material was observed.

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Ultrasonic Welding of Aluminum and Silicon Wafer

Materials Science Forum ◽

10.4028/www.scientific.net/msf.505-507.841 ◽

2006 ◽

Vol 505-507 ◽

pp. 841-846

Author(s):

Kuen Ming Shu ◽

Hung Rung Shih

Keyword(s):

Experimental Study ◽

Silicon Wafer ◽

Ultrasonic Welding ◽

Vacuum Deposition ◽

Aluminum Wire ◽

Welding Condition ◽

Microstructure Observation ◽

Deposit Surface ◽

Welding Processes ◽

Welding Force

There are several types of welding method to join metal and ceramic. This paper gives a description of an experimental study of the ultrasonic welding of aluminum wire and silicon wafer under the conditions of the frequency of ultrasonic vibration f = 38000Hz, the applied duration T=0.2-1.5 sec, and the welding force Ps =40-140 gf. In this study, vacuum deposition was first applied to deposit surface modification aluminum on silicon wafer, then ultrasonic welding processes were investigated to join aluminum wire and modified silicon wafer. Based on the results of the microstructure observation and tensile test, it is believed that the joining ability can be improved under optimum welding condition.

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Thermal resistance of a Teflon/metal joint at cryogenic temperatures - Experimental study

10.2514/6.2000-2580 ◽

2000 ◽

Author(s):

E. Marotta ◽

J. Fuller ◽

Paulo Couto ◽

Marcia Mantelli

Keyword(s):

Experimental Study ◽

Thermal Resistance ◽

Cryogenic Temperatures ◽

Metal Joint

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EXPERIMENTAL STUDY ON ULTRASONIC WELDING OF ALUMINUM SHEET TO COPPER SHEET

International Journal of Research in Engineering and Technology ◽

10.15623/ijret.2013.0212029 ◽

2013 ◽

Vol 02 (12) ◽

pp. 161-166 ◽

Cited By ~ 2

Author(s):

Ganesh M .

Keyword(s):

Experimental Study ◽

Ultrasonic Welding ◽

Aluminum Sheet ◽

Copper Sheet

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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