Determination of Aluminum Alloy Tempers Through Electrical Conductivity Measurements (Eddy Current)

2002 ◽  
Author(s):  
Keyword(s):  
Electrical Conductivity ◽  
Aluminum Alloy ◽  
Eddy Current ◽  
Conductivity Measurements

Elektrische Leitfähigkeitsmessungen und Bestimmung des G(freie Ionen)-Wertes bei röntgenbestrahlten Flüssigkeiten verschiedener Molekularstruktur

1968 ◽  
Vol 23 (2) ◽  
pp. 126-133 ◽  
Author(s):  
Werner F. Schmidt
Keyword(s):  
Electrical Conductivity ◽  
Room Temperature ◽  
Absorbed Dose ◽  
Recombination Coefficient ◽  
Conductivity Measurements ◽  
Absorbed Dose Rate ◽  
X Ray ◽  
Free Ions ◽  
Radiation Induced

Electrical conductivity measurements were made for the determination of G (free ions) in some hydrocarbons. The radiation source was a x-ray tube operated at 55 kV. Four quantities were measured for each liquid: 1. the stationary electrical conductivity at low electric field strength during irradiation, 2. the mobilities of the radiation-induced ions, 3. the volume recombination coefficient, and 4. the absorbed dose rate.All measurements were performed with aerated liquids at room temperature. The following G-values were obtained: n-pentane 0,1; n-hexane and n-heptane 0,09; iso-octane 0,11; cyclohexane 0,06; benzene 0,07; decalin 0,04. The standard deviation was estimated to ± 25 per cent.

scholarly journals Determination of the conductivity and thickness of conductive layers on conductive base materials

2019 ◽  
Vol 11 (7) ◽  
pp. 168781401985423
Author(s):  
John Burkhardt
Keyword(s):  
Simultaneous Determination ◽  
Layer Thickness ◽  
Eddy Current ◽  
Base Material ◽  
Experimental Results ◽  
Conductive Layer ◽  
Conductivity Measurements ◽  
Apparent Conductivity ◽  
Base Materials

An eddy current technique for the simultaneous determination of the layer thickness and conductivity of a uniform conductive layer on a known conductive base material is presented. Layer thickness and conductivity are determined by fitting apparent conductivity measurements taken on the surface of the part at a discrete set of frequencies to a calibration volume. The calibration volume is constructed from apparent conductivity measurements taken on a set of known layer materials, of various known thicknesses, as a function of frequency. Experimental results that support the technique are presented.

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