Climb of prismatic loops in Cu--Al alloys during irradiation in the HVEM

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Nucleation and growth of prismatic interstitial loops was observed during irradiation in the HVEM at different temperatures and damage rates. The loops remained rhombus shaped throughout growth, with sides lying on (111) planes, suggesting low jog densities. Weak-beam electron micrographs showed that the loops were dissociated on the (111) planes containing the loop sides. A minimum damage rate, PHI/sub min/, was found to be necessary to induce growth at measurable rates. This, together with the low jog densities observed, was taken to indicate that the climb rate was affected by the rate of jog nucleation, rather than controlled entirely by ... continued below

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8 p.

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Kosel, T. & Washburn, J. October 1, 1975.

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Nucleation and growth of prismatic interstitial loops was observed during irradiation in the HVEM at different temperatures and damage rates. The loops remained rhombus shaped throughout growth, with sides lying on (111) planes, suggesting low jog densities. Weak-beam electron micrographs showed that the loops were dissociated on the (111) planes containing the loop sides. A minimum damage rate, PHI/sub min/, was found to be necessary to induce growth at measurable rates. This, together with the low jog densities observed, was taken to indicate that the climb rate was affected by the rate of jog nucleation, rather than controlled entirely by the rate of diffusion of point defects to the dislocations. PHI/sub min/ was found to be smaller for alloys of higher stacking fault energies, probably due to the influence of stacking fault energy on the energy of jog formation on an extended dislocation. The growth rate was found to be constant for individual loops observed over a large size range, suggesting that jog nucleation occurred preferentially at loop corners. (auth)

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8 p.

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Dep. NTIS

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  • International conference on radiation damage in metals, Gatlinburg, Tennessee, USA, 5 Oct 1975

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  • Report No.: LBL--3922
  • Report No.: CONF-751006--25
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 4087157
  • Archival Resource Key: ark:/67531/metadc865138

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  • October 1, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 2:34 p.m.

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Kosel, T. & Washburn, J. Climb of prismatic loops in Cu--Al alloys during irradiation in the HVEM, article, October 1, 1975; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc865138/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.