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Study on the Effect of Thermal Property of Metals in Ultrasonic-Assisted Laser Machining

초음파 원용 레이저 가공에서 재료의 열적 물성이 표면상태에 미치는 영향에 관한 연구

  • Lee, Hu Seung (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Gun Woo (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Jong Eun (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Yang, Min Yang (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Cho, Sung Hak (Div. of Nano-Convergence Manufacturing Systems Research, Korea Institute of Machinery and Materials) ;
  • Park, Jong Kweon (Dev. of Ultra-Precision Machines and Systems Advanced Manufacturing System Research, Korea Institute of Machinery and Materials)
  • 이후승 (한국과학기술원 기계공학과) ;
  • 김건우 (한국과학기술원 기계공학과) ;
  • 박종은 (한국과학기술원 기계공학과) ;
  • 양민양 (한국과학기술원 기계공학과) ;
  • 조성학 (한국기계연구원 나노공정연구실) ;
  • 박종권 (한국기계연구원 초정밀시스템연구실)
  • Received : 2014.11.06
  • Accepted : 2015.06.10
  • Published : 2015.08.01

Abstract

The laser machining process has been proposed as an advanced process for the selective fabrication of electrodes without a mask. In this study, we adapt laser machining to metals that have different thermal properties. Based on the results, the metals exhibit a different surface morphology, heat-affected zone (HAZ), and a recast layer around the machined surface according to their thermal conductivity, boiling point, and thermal diffusivity. Then, we apply ultrasonic-assisted laser machining to remove the recast layer. The ultrasonic-assisted laser machining exhibits a better surface quality in metals with higher diffusivity than those having lower diffusivity.

Keywords

Heat Affected Zone;Recast Layer;Thermal Conductivity;Boiling Point;Ultrasonic Vibration;Thermal Diffusivity

Acknowledgement

Supported by : 지식경제부

References

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