Dislocation Relaxation Spectra of Cold-Worked Body-Centered Cubic Transition Metals

Chambers, R.H.; Schultz, J. M.

doi:10.1103/physrevlett.6.273

Cited by 29 publications

(9 citation statements)

References 6 publications

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“…A few years after the mechanism of the Bordoni-type relaxation processes in fcc metals had become the subject of discussion, a search for analogous processes in bcc metals began [52][53][54][55][56][57][58]. By that time, striking differences between the deformation behaviour of fcc and bcc metals were already well established.…”

Section: Dislocations In Deformed Body-centred Cubic Metals 11mentioning

confidence: 96%

Progress and problems in the understanding of the dislocation relaxation processes in metals

Seeger

2004

Materials Science and Engineering: A

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Section: Dislocations In Deformed Body-centred Cubic Metals 11mentioning

confidence: 96%

Progress and problems in the understanding of the dislocation relaxation processes in metals

Seeger

2004

Materials Science and Engineering: A

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“…Damping peaks in cold worked niobium in the temperature region around and below room temperature have been described by BRUNER [l], CHAMBERS and SCHULTZ [2,3,4], BORDONI et al [5] and the present author [6, 71. Two absorption maxima are found; e. g. a t 15000 Hz around 165 O K and 310 OK.…”

Section: Introductionmentioning

confidence: 53%

On the Deformation Induced Internal Friction Peaks in Niobium

Batist¹

1963

Physica Status Solidi (b)

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The activation energies and attempt frequencies for the deformation induced damping peaks in niobium are determined. For the α peak these are found to be 0.28 ± 0.01 eV and (2.8 ± 1.8) 1012s−1 from the variation of peak temperature with frequency and using all experimental data presently available. For the β peak, these parameters are estimated using strain recovery experiments performed during the warm‐up after plastic deformation at liquid nitrogen temperature. A value of 0.51 eV is found for 1012 s−1 and 0.48 eV for 1011 s−1, to be compared with values of 0.47 eV and about 1011 s−1 obtained by CHAMBERS and SCHULTZ from the shift of peak temperature with frequency. The width of the α peak is shown to be consistent with a relaxation process having a single attempt frequency, and a distribution of activation energies. Assuming a square distribution of width ΔH about H, it is found that ΔH|H ≈︁ 0.10.

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“…Nevertheless it is too small to explain the lowtemperature internal friction peaks of the refractory b.c.c. metals (cf., e.g., [13]) by the Brailsford mechanism. Possibly, the thermally activated motion of kinks along dislocations may be responsible for the u" internal friction band in Nb.…”

Section: Discussionmentioning

confidence: 99%

Structure, energy, and periodic potential of kinks in screw dislocations for B.C.C. lattices

Hartmann

Pegel²

1970

Physica Status Solidi (b)

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The widths, energies, and periodic potentials of kinks in undissociated screw dislocations are numerically computed within a modified Dietze and Leibfried model. The kinks considered are assumed to lie in a {110} plane. Results are presented for Nb, Mo, and Fe.The kink widths range between 0.8 and 2.6 lattice constants while the amplitudes of the periodic potential felt by the kink when moving along the dislocation are found t o be 6, 15, and 2 meV for Nb, Mo, and Fe, respectively. The kinks are short and the kink widths differ, depending on the kink position, by about 1000/. The kink energies range between 0.5 and 4 eV.

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Dislocation Relaxation Spectra of Cold-Worked Body-Centered Cubic Transition Metals

Cited by 29 publications

References 6 publications

Progress and problems in the understanding of the dislocation relaxation processes in metals

Progress and problems in the understanding of the dislocation relaxation processes in metals

On the Deformation Induced Internal Friction Peaks in Niobium

Structure, energy, and periodic potential of kinks in screw dislocations for B.C.C. lattices

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