发明名称 |
NON-DESTRUCTION METHOD OF DETERMINATION OF MECHANICAL STRESS IN SURFACE LAYER OF ITEMS FROM METALS AND ALLOYS |
摘要 |
FIELD: technological processes; measurement. ^ SUBSTANCE: related to measurement equipment, namely, to non-destruction methods of determination of mechanical stresses in surface layer of items form metals and alloys with different electromagnetic properties. Method is based on phenomenon of skin-effect in conductor. Conducting item is investigated layerwise by means of supply of electromagnetic field of different frequency into it and measurement of item response signal characteristics. Distribution of efficient specific resistance is calculated in the depth of item or increment of efficient specific resistance of item in relation to efficient specific resistance of item made from the same material with known mechanical stresses or in relation to efficient specific resistance of item made from the same material without mechanical stresses. Calibration dependence is removed between efficient specific resistance of item or increment of efficient specific resistance and mechanical stresses of material of investigated item in depths that correspond to preset frequencies. On the basis of removed dependence the distribution of mechanical stresses is obtained in the depth of investigated item. ^ EFFECT: obtaining the non-destruction method of determination of mechanical stresses in surface layer of metal items. ^ 5 dwg |
申请公布号 |
RU2327124(C2) |
申请公布日期 |
2008.06.20 |
申请号 |
RU20060120347 |
申请日期 |
2006.06.09 |
申请人 |
IVANOV SERGEJ JUR'EVICH;VASIL'KOV DMITRIJ VITAL'EVICH;GUTNER ALEKSANDR BORISOVICH;VASIL'KOV SERGEJ DMITRIEVICH;BURAKOV ALEKSANDR IVANOVICH |
发明人 |
IVANOV SERGEJ JUR'EVICH;VASIL'KOV DMITRIJ VITAL'EVICH;GUTNER ALEKSANDR BORISOVICH;VASIL'KOV SERGEJ DMITRIEVICH;BURAKOV ALEKSANDR IVANOVICH |
分类号 |
G01L1/20 |
主分类号 |
G01L1/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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