Study on surface modification of aluminum 6061 by multiple ultrasonic impact treatments

  • Liang Li
  • Miru Kim
  • Seungjun Lee
  • Jongman Kim
  • Hyunse Kim
  • Deugwoo Lee
ORIGINAL ARTICLE

Abstract

The effects of multiple ultrasonic impact treatments (UITs) on the surface properties of aluminum 6061 (Al 6061) were investigated, based on surface topography, hardness, and erosion. With one UIT pass, the value of the surface roughness decreased from 0.65 to 0.19 μm, after which it stabilized. Successive UIT passes caused the surface hardness to increase until it became saturated at 128 HV; this occurred after three UIT passes. X-ray diffraction results showed that as the number of UIT passes increased, the diffraction peak intensity decreased significantly and the full width at half maximum value increased. Debris accumulation was observed with successive UIT passes, which indicated that material was removed from the surface or the surface eroded. Multiple UITs did not cause significant damage to the top surface. It is considered that two principal mechanisms were involved in the evolution of the surface morphology over multiple UITs: plastic deformation and surface erosion by continuous strikes.

Keywords

Al 6061 Ultrasonic impact treatment Surface morphology Hardness Erosion 

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  • Liang Li
    • 1
  • Miru Kim
    • 1
  • Seungjun Lee
    • 2
  • Jongman Kim
    • 1
    • 3
  • Hyunse Kim
    • 4
  • Deugwoo Lee
    • 5
  1. 1.Department of Nano Fusion TechnologyPusan National UniversityBusanRepublic of Korea
  2. 2.Interdisciplinary Department for Innovative Manufacturing EngineeringPusan National UniversityBusanRepublic of Korea
  3. 3.Department of Nanoenergy EngineeringPusan National UniversityBusanRepublic of Korea
  4. 4.Extreme Mechanical Engineering Research DivisionKorea Institute of Machinery and MaterialsDaejeonRepublic of Korea
  5. 5.Department of Nano Mechatronics EngineeringPusan National UniversityBusanRepublic of Korea

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