侵入深さ一定法による表面強加工材の残留応力分布の予測  [in Japanese] Prediction of Residual Stress Distribution in Severe Surface Deformed Steel by Constant Penetration Depth Method  [in Japanese]

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Author(s)

Abstract

The residual stress distribution below the specimen surface of a severe surface deformed medium carbon steel was investigated nondestructively by using high-energy X-rays from a synchrotron radiation source. The carbon steel plate was shot-peened with fine cast iron particles of the size of 50μm. By using the monochromatic X-ray beam with three energy levels of 10, 30 and 72keV, the stress values at the arbitrary depth were measured by the constant penetration depth method. The stress was calculated from the slope of the sin<SUP>2</SUP>ψ diagram. Measured stress corresponds to the weighted average associated with the attenuation of the X-rays in the material. The real stress distribution was estimated by using the optimization technique. The stress distribution was assumed by the polynomials with the order from the first to the third in the near surface layer and the second order polynomial in the deeper region. The coefficients of the polynomials were determined by the conjugate gradient iteration. The predicted stress distribution agreed very well with that measured by the conventional surface removal method.

Journal

  • Journal of the Society of Materials Science, Japan

    Journal of the Society of Materials Science, Japan 57(7), 660-666, 2008

    The Society of Materials Science, Japan

Cited by:  2

Codes

  • NII Article ID (NAID)
    130002085655
  • NII NACSIS-CAT ID (NCID)
    AN00096175
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0514-5163
  • NDL Article ID
    9584707
  • NDL Source Classification
    ZM16(科学技術--科学技術一般--工業材料・材料試験)
  • NDL Call No.
    Z14-267
  • Data Source
    CJPref  NDL  J-STAGE 
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