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Quantitative Evaluation of the Damaged Layer by Machining Using a Scanning Acoustic Microscope

Research Project

Project/Area Number 60460088
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 機械工作
Research InstitutionUniversity of Tokyo

Principal Investigator

SATO Hisayoshi  Institute of Industrial Science, University of Tokyo, 生産技術研究所, 教授 (10013103)

Co-Investigator(Kenkyū-buntansha) IKENO Jun'ichi  Institute of Industrial Science, University of Tokyo, 生産技術研究所, 助手 (10184441)
O-HORI Masanori  Institute of Industrial Science, University of Tokyo, 生産技術研究所, 助手 (90143528)
SEMBA Takuya  Fukuoka Institute of Technology, 電子機械工学科, 講師 (30154678)
TANI Yasuhiro  Institute of Industrial Science, University of Tokyo, 生産技術研究所, 助教授 (80143527)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥7,300,000 (Direct Cost: ¥7,300,000)
Fiscal Year 1986: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1985: ¥5,900,000 (Direct Cost: ¥5,900,000)
KeywordsSurface integrity / Damaged layer / Evaluation / Acoustic microscope / V(z) characteristic / Rayleigh wave / Reflection power / 波形解析
Research Abstract

The mechanical and physical properties of base metals deteriorate during machining. A nondestructive evaluation of surface integrity provides information for these determination of the conditions in certain manufacturing processes.
For this kind of inspection, the X-ray diffraction method, eddy current electromagnetics, ultrasonic techniques and other methods have conventionally been employed. In particular, the ultrasonic technique utilizing the Rayleigh surface wave has been used for the in-process measurement of the nonumiformity of materials and the internal cracks in machined parts. However, the resolution by this method was not sufficient to detect a radical change in the extent of damage within a layer immediately beneath the surface. This disadvantage has been overcome by the development of the Scanning Acoustic Microscope (SAM) which utilizes a focussed acoustic beam.
Microscopic identification of a damaged layer, produced by machining, was performed by a Scanning Acoustic Microscope. From the series of experiments, the following points have been clarified. 1) The sum of the principal stress has been able to detect and the information related to the hardness could be obtained by a SAM. 2) The wave strength by a SAM is possible to detect the variation of Young's modulus caused by the deformation. This was verified by using a polycarbonate film as a specimen which has a significant material nonlinearity. 3) The degeneration in the metallurgically-damaged layer can be evaluated by the Rayleigh wave velocity, and the total reflection power on the Fourier transform of the V(z) curve.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] T.Semba: Proceedings of International Conference on Experimental Mechanics. 1. 596-601 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 仙波卓弥: 生産研究. 37. 461-468 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 仙波卓弥: 生産研究. 37. 508-511 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 仙波卓弥: 日本機械学会論文集(A編). 51. 2817-2822 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 仙波卓弥: 日本機械学会論文集(C編). 53. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] SEMBA, Takuya: "Application of Acoustic Microscopy to Stress Measurement" Proceeding of International Conference on Experimental Mechanics in Beijing. 1. 596-601 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] SEMBA, Takuya: "How the Scanning Acoustic Microscope can be used for the non-destructive inspections?" SEISAN-KENKYU. 37. 461-468 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] SEMBA, Takuya: "Stress Measuring Technique by a Scanning Acoustic Microscope" SEISAN-KENKYU. 37. 508-511 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] SEMBA, Takuya: "Stress Measurement by a Scanning Acoustic Microscope (Evaluation of Reflected Wave Strength)" Journal of JSME. 51. 2817-2822 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] SEMBA, Takuya: "Quantitative Evaluation of the Damaged Later of a Ground Surface by a Scanning Acoustic Microscope" Journal of JSME. 53. to be printed (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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