Letter | Published:

Unloading Effects in Copper Single Crystals

Naturevolume 180pages14761477 (1957) | Download Citation

Subjects

Abstract

Haasen and Kelly1 have observed a small yield point on retesting previously strained single crystals of aluminium and nickel at the same or lower temperatures than the initial deformation. The effect occurred only when the crystals were unloaded between tests, and no yield point was found at low stresses. Annealing at 300° K., between tests at 90° K., increased the magnitude of the yield phenomenon and much larger yield points were observed when the second deformation was carried out at a lower temperature than the first. Haasen and Kelly attributed the effect to the rearrangement of dislocations during unloading.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Haasen, P., and Kelley, A., Acta Met., 5, 192 (1957).

  2. 2

    Friedel, J., Phil. Mag., 46, 1169 (1955).

  3. 3

    Stroh, A. N., Phil. Mag., 1, 489 (1956).

Download references

Author information

Affiliations

  1. Metallurgy Division, Atomic Energy Research Establishment, Harwell, Berks

    • M. J. MAKIN

Authors

  1. Search for M. J. MAKIN in:

About this article

Publication history

Issue Date

DOI

https://doi.org/10.1038/1801476b0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.