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RESEARCH PAPERS: Warhead Mechanics

The Use of the Gamma-Ray Absorption Technique as a Quality Control Procedure in the Manufacture of Powder Metal Shaped Charge Liners

[+] Author and Article Information
J. J. Lawrie

 iThemba Labs, P.O. Box 722, Somerset-West, South Africa

F. J. Mostert

Defence Peace Safety and Security, CSIR, P.O. Box 395, 0001 Pretoria, South Africa

P. J. König

 KingTech, c/o P.O. Box 187, 7129 Somerset-West, South Africa

K. D. Werneyer

 TTP Products, P.O. Box 1400, 7129 Somerset-West, South Africa

J. Appl. Mech 77(5), 051701 (Jul 01, 2010) (4 pages) doi:10.1115/1.4001914 History: Received July 23, 2009; Revised April 08, 2010; Posted June 03, 2010; Published July 01, 2010; Online July 01, 2010

The use of the gamma-ray absorption technique as a tool in evaluating the quality of manufactured powder metal liners was investigated. With powder metal liners, it is not only of interest to know whether the liner conforms geometrically to the required specifications but it is also important to know whether there is radial symmetry in the density. Powder metal liners manufactured via compaction methods were subjected to a gamma absorption proof of principle experiment and it was concluded that the technique can serve as an effective quality control method in the manufacturing process of powder metal shaped charge liners.

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Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

The percentage error in the areal density measurement as a function of μρx for N0 of 10,000

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Figure 2

Diagram (not to scale) of the measurement setup

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Figure 3

Intensity variation as function of position near the edge of the liner after calibration of the position. A position of zero corresponds to the midpoint between maximum and minimum intensity.

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Figure 4

Axial variation in areal density measured for sample 1 at 0 deg

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Figure 5

Axial variation in areal density measured for sample 2 at 0 deg

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Figure 6

Radial variation in the areal density for sample 1 at 13 mm axial position

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Figure 7

Radial variation in areal density for sample 2 at 11.5 mm axial position

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