ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract A reasonably perfect cyclotrimethylenetrinitramine (RDX) explosive crystal has been studied by surface reflection (Berg-Barrett) X-ray topography for the purpose of further elucidating the microstructural basis for hot spots forming in secondary explosives. Topographs were obtained through the base (¯2 1 0) surface of a crystal grown by slow evaporation from an acetone solution. (¯7 2¯1) and (¯6 3¯2) reflections have revealed the central strain field of a large growth defect. This type of defect is proposed to be a suitable internal obstacle for triggering dislocation pile-up collapse during crystal deformation and fracture. Also, extremely localized plastic deformation zones were revealed at Knoop microindentations employed to measure the hardness anisotropy in the (¯2 1 0) crystal surface. A combination of restricted slip systems and cracking is responsible for the significant anisotropy.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02397058
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