Collapse of defect cascades to dislocation loops

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We review a number of experiments that we have recently performed to investigate the collapse of defect cascades to dislocation loops. This important ion and neutron irradiation phenomenon has been studied with in situ ion bombardment in the Argonne National Laboratory High Voltage Electron Microscope-Ion Accelerator Facility at temperatures of 30 and 300/sup 0/K in Cu/sub 3/Au, Cu, and Fe, and 30, 300 and 600/sup 0/K in Ni. These experiments have demonstrated that individual defect cascades collapse to dislocation loops athermally at 30/sup 0/K in some materials (Ni, Cu and Cu/sub 3/Au), while in another material (Fe) only overlapped cascades ... continued below

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Pages: 24

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Kirk, M.A.; Robertson, I.M.; Jenkins, M.L.; English, C.A.; Black, T.J. & Vetrano, J.S. April 1, 1986.

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Description

We review a number of experiments that we have recently performed to investigate the collapse of defect cascades to dislocation loops. This important ion and neutron irradiation phenomenon has been studied with in situ ion bombardment in the Argonne National Laboratory High Voltage Electron Microscope-Ion Accelerator Facility at temperatures of 30 and 300/sup 0/K in Cu/sub 3/Au, Cu, and Fe, and 30, 300 and 600/sup 0/K in Ni. These experiments have demonstrated that individual defect cascades collapse to dislocation loops athermally at 30/sup 0/K in some materials (Ni, Cu and Cu/sub 3/Au), while in another material (Fe) only overlapped cascades produced dislocation loops. A slight sensitivity to the irradiation temperature is demonstrated in Cu/sub 3/Au and Fe, and a strong dependence on the irradiation temperature is seen in Ni. This phenomenon of cascade collapse to dislocation loops in metals at 30/sup 0/K provides an understanding for previous neutron irradiation data. The more detailed dependencies of the collapse probability on material, temperature, bombarding ion dose, ion energy and ion mass contribute much information to a thermal spike model of the collision cascade which we will describe.

Physical Description

Pages: 24

Notes

NTIS, PC A02/MF A01; 1.

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  • 2. international conference on fusion reactor materials (ICFRM-2), Chicago, IL, USA, 13 Apr 1986

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  • Other: DE86010519
  • Report No.: CONF-860421-39
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5926099
  • Archival Resource Key: ark:/67531/metadc1095269

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Office of Scientific & Technical Information Technical Reports

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  • April 1, 1986

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  • Feb. 18, 2018, 3:59 p.m.

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  • Feb. 21, 2018, 1:37 p.m.

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Kirk, M.A.; Robertson, I.M.; Jenkins, M.L.; English, C.A.; Black, T.J. & Vetrano, J.S. Collapse of defect cascades to dislocation loops, article, April 1, 1986; United States. (digital.library.unt.edu/ark:/67531/metadc1095269/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.