Measurements of Strain Induced Resistivity by the Eddy-Current Decay Method

1988 ◽  
Vol 142 ◽  
Author(s):  
K. Theodore Hartwig
Keyword(s):  
Electrical Resistivity ◽  
Low Temperature ◽  
Plastic Strain ◽  
Eddy Current ◽  
Pure Aluminum ◽  
Bulk Metal ◽  
Resistivity Measurements ◽  
Current Decay ◽  
Characterization Studies

AbstractThe eddy-current decay method developed by Bean for electrical resistivity measurements is well-suited for bulk metal characterization studies. The technique can be applied to investigations of low temperature plastic strain in pure aluminum.

Analysis of Resistivity Measurements by the Eddy Current Decay Method

1968 ◽  
Vol 39 (7) ◽  
pp. 1019-1026 ◽  
Author(s):  
J. LePage ◽  
A. Bernalte ◽  
D. A. Lindholm
Keyword(s):  
Eddy Current ◽  
Resistivity Measurements ◽  
Current Decay

Electrical Resistivity Measurements: A Sensitive Tool for Studying Aluminium Alloys

2006 ◽  
Vol 519-521 ◽  
pp. 1391-1396 ◽  
Author(s):  
B. Raeisinia ◽  
Warren J. Poole
Keyword(s):  
Electrical Resistivity ◽  
Aluminum Alloys ◽  
Aluminium Alloys ◽  
Room Temperature ◽  
Pure Aluminum ◽  
Cold Work ◽  
Resistivity Measurements ◽  
Sensitive Tool ◽  
Solute Atoms

This paper examines the challenges which are encountered when using electrical resistivity measurements for characterization of microstructures in aluminum alloys. Experimental examples are provided of electrical resistivity studies conducted on two aluminum alloys, a heattreatable alloy (AA6111) and a non-heat-treatable alloy (AA5754), which demonstrate how the technique can be used to characterize changes in the microstructure. Results on AA6111 show that the dependence of the measurement on solute atoms and fine scale precipitates makes deconvolution of the resistivity signal non-trivial and therefore, utilization of supplementary technique(s) in conjunction with electrical resistivity measurements is essential. In the next example, room temperature electrical resistivity measurements as a function of cold work for AA5754 illustrate a larger resistivity contribution from dislocations in this alloy as compared to that reported for pure aluminum. The interaction of solutes and dislocations is cited as the possible source for the increased dislocation contribution.

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