Original scientific paper

Creep of polycrystalline aluminium at 333 K

Sajjad A. Chaudhary ; Department of Metallurgy and Materials Science, Polytechnic of Sokoto State, Nigeria
Muhammad Z. Butt ; Government College, Pind Dadtm Khan, Punjab, Pakistan

Abstract

Creep of 99.999% pure aluminium polycrystal was studied at 333 K for compressive stresses of 20, 22, 24, 26 and 28 MPa. The observed stress dependence of the slope s = d ε/dln (1 + t/t0) of the creep strain-time curves in semi-logarithmic representation was examined in terms of a stochastic model of logarithmic creep. The intrinsic height of the rate-controlling energy-barrier, 0.95 eV, derived from the model was compatible with the activation energy for cross-slip (1.05 eV). The inference that-cross-slip facilitated recovery was consistent with the concurrent examination of slip-lines on the surfaces of crept crystals.

Keywords

Hrčak ID:

329834

URI

https://hrcak.srce.hr/329834

Publication date:

8.4.1985.

Article data in other languages: croatian

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