The effect of ultrasonic-vibration on upsetting

Jung Chung Hung*, Yu Chung Tsai, Ching-Hua Hung

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Ultrasonic-vibration upsetting is a process in which a cylindrical specimen is compressed by an axial force while the ultrasonic vibration is simultaneously applied to the die. Homogenous deformation is difficult to achieve during this process because of the friction at the interface between the specimen and the die. An extrapolated compression test was performed in this study on aluminum alloy specimens to explore the effect of superimposing ultrasonic-vibration during upsetting. Experimental results indicate that ultrasonic-vibration reduced the compressive force when the friction was eliminated by the extrapolated compression test. The specimen size also influences the force-reducing effects of ultrasonic-vibration. The decrease in the compressive force is smaller for a larger specimen. The barreling profile of the specimen after test indicates that the interface friction will increase during ultrasonic-vibration compression. Additionally, the raised material temperatures are caused by ultrasonic-vibration. Experimental results of the hot extrapolated compression test and the hot ring compression test indicate that the drop in the flow stress and the increase in the interface friction are caused by the increase in the temperature of the material under ultrasonic vibration.

Original languageEnglish
Title of host publicationProceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA 2006
StatePublished - 1 Dec 2006
Event8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006 - Torino, Italy
Duration: 4 Jul 20067 Jul 2006

Publication series

NameProceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006
Volume2006

Conference

Conference8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006
CountryItaly
CityTorino
Period4/07/067/07/06

Keywords

  • Aluminum alloy
  • Extrapolated compression test
  • Interface friction
  • Ring compression
  • Ultrasonic-vibration

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