Grain boundary sliding as a significant mechanism of low temperature plastic deformation in ECAP aluminum

N. Chinh, G. Vörös, Péter Szommer, Zenji Horita, Terence G. Langdon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)

Abstract

Recently, the stress-strain relationships of high purity Al and Cu were investigated over a wide range of strain by combining data obtained in conventional tensile and compression testing of annealed samples with data obtained after processing by equal-channel angular pressing (ECAP) to high imposed strains. It was shown that the nature of the macroscopic stress-strain relationship characteristically changes in different regions of the testing temperature. In the low temperature region the macroscopic stress-strain behavior shows a monotonously increasing tendency over the entire range of strain inherent in these experiments, while at high testing temperatures the flow stress increases only up to a certain strain. It was also shown that in the positive strain-hardening region the stress-strain relationship can be described by an exponential-power law constitutive equation which includes the main features of the conventional Hollomon power-law and the Voce exponential relationships. On the basis of this new equation, low and high temperature deformation regions can be defined. In the present work, additional results are reported on the mechanism of steady-state flow of pure Al deformed at low temperatures. Results obtained by compression and indentation tests on ECAP Al samples, in addition to atomic force microscopy (AFM), show that in the low temperature region grain boundary sliding (GBS) is a significant mechanism of plastic deformation at high strains.

Original languageEnglish
Title of host publicationMaterials Science Forum
Pages1001-1006
Number of pages6
Volume503-504
Publication statusPublished - 2006
Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
Duration: Sep 22 2005Sep 26 2005

Publication series

NameMaterials Science Forum
Volume503-504
ISSN (Print)02555476

Other

Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
CountryJapan
CityFukuoka
Period9/22/059/26/05

Fingerprint

Equal channel angular pressing
Grain boundary sliding
Aluminum
Plastic deformation
Temperature
High temperature testing
Compression testing
Tensile testing
Constitutive equations
Plastic flow
Indentation
Strain hardening
Atomic force microscopy
Compaction

Keywords

  • Atomic force microscopy
  • Equal-channel angular pressing (ECAP)
  • Grain boundary sliding
  • Low temperature plastic deformation
  • Ultra-fine grains

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Chinh, N., Vörös, G., Szommer, P., Horita, Z., & Langdon, T. G. (2006). Grain boundary sliding as a significant mechanism of low temperature plastic deformation in ECAP aluminum. In Materials Science Forum (Vol. 503-504, pp. 1001-1006). (Materials Science Forum; Vol. 503-504).

Grain boundary sliding as a significant mechanism of low temperature plastic deformation in ECAP aluminum. / Chinh, N.; Vörös, G.; Szommer, Péter; Horita, Zenji; Langdon, Terence G.

Materials Science Forum. Vol. 503-504 2006. p. 1001-1006 (Materials Science Forum; Vol. 503-504).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chinh, N, Vörös, G, Szommer, P, Horita, Z & Langdon, TG 2006, Grain boundary sliding as a significant mechanism of low temperature plastic deformation in ECAP aluminum. in Materials Science Forum. vol. 503-504, Materials Science Forum, vol. 503-504, pp. 1001-1006, 3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3, Fukuoka, Japan, 9/22/05.
Chinh N, Vörös G, Szommer P, Horita Z, Langdon TG. Grain boundary sliding as a significant mechanism of low temperature plastic deformation in ECAP aluminum. In Materials Science Forum. Vol. 503-504. 2006. p. 1001-1006. (Materials Science Forum).
Chinh, N. ; Vörös, G. ; Szommer, Péter ; Horita, Zenji ; Langdon, Terence G. / Grain boundary sliding as a significant mechanism of low temperature plastic deformation in ECAP aluminum. Materials Science Forum. Vol. 503-504 2006. pp. 1001-1006 (Materials Science Forum).
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