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| NCJ Number:
|
NCJ 203112
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| Title:
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Potential Metallographic Technique for the Investigation of Pipe Bombings
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| Journal:
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Journal of Forensic Sciences Volume:48 Issue:5 Dated:September 2003 Pages:945 to 960
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| Author(s):
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Graham A. Walsh M.S. ; Osman T. Inal Ph.D. ; Van D. Romero Ph.D.
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| Publisher Url*:
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http://www.astm.org |
| Publication Date:
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09/2003 |
| Pages:
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16 |
| Type:
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Studies/research reports |
| Origin:
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United States |
| Language:
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English |
| Annotation:
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This study sought to develop a metallographic method for
investigating pipe bombings. |
| Abstract:
|
Eight fillers that consisted of five high explosives and three
propellants were tested in pipes composed of ASTM A53 galvanized
steel, AISI 304L stainless steel, and 6061-T6 aluminum. The explosives used were ANFO, Composition C4, C6 detasheet,
nitroglycerine-based dynamite, and flake TNT. The propellants
used were FFFFg black powder, Red Dot smokeless powder, and Turbo
Fuel A. The fragments from these tests were collected in soft
catch packets, which consisted of 24 rectangles of Celotex, 33x66cm, bound together to form a packet 33-cm thick. The resulting microstructures and hardness of the fragments were examined in an effort to correlate an explosive property, such as the detonation velocity, to a material response. The three main shock properties of interest in this study were the detonation velocity of the explosives, the generated pressure, and shock heating, which are functions of the metal/explosive combinations being studied. The post-blast microstructure, hardness, and, in the case of 304L, martensite content showed a sharp increase followed by a plateau as the shock pressure and detonation
velocity increased. Although this technique of investigation is
essentially qualitative, further research could enable these
methods to be used in providing a range of detonation velocities
and pressures of an explosive fill used in a pipe bomb. This
could in turn be useful as a screening process for chemical
examinations. 6 tables, 19 figures, and 30 references |
| Main Term(s):
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Police policies and procedures |
| Index Term(s):
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Metal identification ; Bombs ; Explosives ; Bombings ; Investigative techniques ; Explosives tracing |
| |
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/Publications/abstract.aspx?ID=203112
|
* A link to the full-text document is provided whenever possible. For documents
not available online, a link to the publisher's web site is provided.
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