Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Effect of High Frequency Oscillation on Compression Tests of Aluminum Cylindrical Specimens

알루미늄 실린더 압축실험에서의 고주파 진동의 영향

  • Kim, S.W. (Materials Deformation Department, Korea Institute of Materials Science) ;
  • Lee, Y.S.
  • Received : 2016.09.08
  • Accepted : 2016.10.27
  • Published : 2016.12.01
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Abstract

Recent researches have reported that the superposition of ultrasonic vibrations in metal forming provides beneficial effects such as the reduction of forming load, flow stress and interfacial friction which improves the surface quality of end products. This paper presents experimental investigations on the effects of ultrasonic vibrations in upsetting tests of aluminum. The ultrasonic exciting system consists of piezoelectric transducer and resonator was designed and constructed to superimpose high frequency oscillation on the forming tools. Ultrasonic vibration-assisted upsetting tests were performed for three vibration modes five amplitudes, and the results were compared with those of conventional upsetting tests. The results showed that the superimposition of ultrasonic vibration reduces the upsetting load, and the load reduction is only dependent on the amplitude of the applied vibration regardless of deformation histories and vibration modes.

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References

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