Abstract
Ion bombardment is a convenient and economical means for simulating the damage produced in metals due to fast neutron irradiation. Unlike that produced by neutrons, however, the damage caused by ion bombardment is not homogeneously distributed throughout the volume of the metal since ions penetrate metallic specimens only a short distance. Moreover, the number of displaced atoms is a sensitive function of the kinetic energy of the bombarding ions as well as the depth within the target material (specimen). Therefore materials which have been subjected to ion bombardment require careful analysis of the spatial distribution of the damage before meaningful inferences can be made.The experimental material for this study was Type-304 stainless steel sheet, approximately 100 μm thick, which was bombarded in a cyclotron with 12 MeV deuterons. Irradiation time and temperature were the principal variables. Because of the small size of the voids produced and the shallow damage zone, techniques of transmission electron microscopy (TEM) are most commonly used for void examination. In the present work we compare two alternative approaches to the problem of characterizing the spatial distribution of damage within such specimens.
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Schedule a callMore From: Proceedings, annual meeting, Electron Microscopy Society of America
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