Initial increase, ''peaking effect'', in the internal friction of copper following pulsed neutron and electron irradiation

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Under certain experimental conditions the internal friction in metals can first increase and following prolonged irradiation decrease. Many models have been proposed to account for this ''peaking effect''; however, in many of the cases, no effort is made to distinguish between the influence of interstitials and/or vacancies. To determine the nature of the point defect responsible for the peaking effect in high purity copper, we have performed a series of pulsed irradiations using neutrons and electrons. In all of the experiments an initial very rapid rise in the internal friction and Young's modulus was observed. These data show that a ... continued below

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Pages: 6

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Simpson, H.M.; Parkin, D.M.; Goldstone, J.A. & Hemsky, J.W. January 1, 1985.

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Description

Under certain experimental conditions the internal friction in metals can first increase and following prolonged irradiation decrease. Many models have been proposed to account for this ''peaking effect''; however, in many of the cases, no effort is made to distinguish between the influence of interstitials and/or vacancies. To determine the nature of the point defect responsible for the peaking effect in high purity copper, we have performed a series of pulsed irradiations using neutrons and electrons. In all of the experiments an initial very rapid rise in the internal friction and Young's modulus was observed. These data show that a fast diffusing defect is responsible for the peaking effect: i.e. the interstitial.

Physical Description

Pages: 6

Notes

NTIS, PC AO2/MF A01; 1.

Source

  • Conference on internal friction and ultrasonic attenuation in solids, Urbana, IL, USA, 3 Jun 1985

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  • Other: DE85012767
  • Report No.: LA-UR-85-1829
  • Report No.: CONF-8506125-2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5740878
  • Archival Resource Key: ark:/67531/metadc1093038

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1985

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 4, 2018, 12:44 p.m.

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Simpson, H.M.; Parkin, D.M.; Goldstone, J.A. & Hemsky, J.W. Initial increase, ''peaking effect'', in the internal friction of copper following pulsed neutron and electron irradiation, article, January 1, 1985; United States. (digital.library.unt.edu/ark:/67531/metadc1093038/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.