Stability against coarsening in ultra-fine grained aluminum alloy AA 3103 sheet fabricated by continuous confined strip shearing

H. G. Kang; J. P. Lee; M. Y. Huh; O. Engler

doi:10.1016/j.msea.2007.09.048

Stability against coarsening in ultra-fine grained aluminum alloy AA 3103 sheet fabricated by continuous confined strip shearing

H. G. Kang, J. P. Lee, M. Y. Huh, O. Engler

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The stability of ultra-fine grained Al-Mn alloy AA 3103 against coarsening at elevated temperature is analyzed. AA 3103 sheets were produced by means of continuous confined strip shearing (CCSS), which represents an adaptation of equal channel angular pressing to impose severe plastic deformation on sheet samples. With increasing number of CCSS passages, finer and more uniform grains with an increasing fraction of high-angle grain boundaries (HAGBs) were observed. In particular, the sample subjected to 12 passages of CCSS displayed fairly uniform equiaxed grains with an average size of 1.6 μm. During subsequent annealing at 300 and 350 °C, these grains were quite stable, exhibiting a rather low growth rate. This stability is explained in terms of Humphreys' unified theory of the stability of cellular structures, which has shown that under conditions of very large strains when HAGBs prevail intrinsically stable microstructure will be formed.

Original language	English
Pages (from-to)	470-480
Number of pages	11
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	486
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2007.09.048
Publication status	Published - 2008 Jul 15

Keywords

Al alloys
Continuous confined strip shearing
Continuous grain growth
Discontinuous grain growth
Severe plastic deformation
Ultra-fine grain

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2007.09.048

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Stability against coarsening in ultra-fine grained aluminum alloy AA 3103 sheet fabricated by continuous confined strip shearing. / Kang, H. G.; Lee, J. P.; Huh, M. Y. et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 486, No. 1-2, 15.07.2008, p. 470-480.

Research output: Contribution to journal › Article › peer-review

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abstract = "The stability of ultra-fine grained Al-Mn alloy AA 3103 against coarsening at elevated temperature is analyzed. AA 3103 sheets were produced by means of continuous confined strip shearing (CCSS), which represents an adaptation of equal channel angular pressing to impose severe plastic deformation on sheet samples. With increasing number of CCSS passages, finer and more uniform grains with an increasing fraction of high-angle grain boundaries (HAGBs) were observed. In particular, the sample subjected to 12 passages of CCSS displayed fairly uniform equiaxed grains with an average size of 1.6 μm. During subsequent annealing at 300 and 350 °C, these grains were quite stable, exhibiting a rather low growth rate. This stability is explained in terms of Humphreys' unified theory of the stability of cellular structures, which has shown that under conditions of very large strains when HAGBs prevail intrinsically stable microstructure will be formed.",

keywords = "Al alloys, Continuous confined strip shearing, Continuous grain growth, Discontinuous grain growth, Severe plastic deformation, Ultra-fine grain",

author = "Kang, {H. G.} and Lee, {J. P.} and Huh, {M. Y.} and O. Engler",

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AU - Kang, H. G.

AU - Lee, J. P.

AU - Huh, M. Y.

AU - Engler, O.

PY - 2008/7/15

Y1 - 2008/7/15

N2 - The stability of ultra-fine grained Al-Mn alloy AA 3103 against coarsening at elevated temperature is analyzed. AA 3103 sheets were produced by means of continuous confined strip shearing (CCSS), which represents an adaptation of equal channel angular pressing to impose severe plastic deformation on sheet samples. With increasing number of CCSS passages, finer and more uniform grains with an increasing fraction of high-angle grain boundaries (HAGBs) were observed. In particular, the sample subjected to 12 passages of CCSS displayed fairly uniform equiaxed grains with an average size of 1.6 μm. During subsequent annealing at 300 and 350 °C, these grains were quite stable, exhibiting a rather low growth rate. This stability is explained in terms of Humphreys' unified theory of the stability of cellular structures, which has shown that under conditions of very large strains when HAGBs prevail intrinsically stable microstructure will be formed.

AB - The stability of ultra-fine grained Al-Mn alloy AA 3103 against coarsening at elevated temperature is analyzed. AA 3103 sheets were produced by means of continuous confined strip shearing (CCSS), which represents an adaptation of equal channel angular pressing to impose severe plastic deformation on sheet samples. With increasing number of CCSS passages, finer and more uniform grains with an increasing fraction of high-angle grain boundaries (HAGBs) were observed. In particular, the sample subjected to 12 passages of CCSS displayed fairly uniform equiaxed grains with an average size of 1.6 μm. During subsequent annealing at 300 and 350 °C, these grains were quite stable, exhibiting a rather low growth rate. This stability is explained in terms of Humphreys' unified theory of the stability of cellular structures, which has shown that under conditions of very large strains when HAGBs prevail intrinsically stable microstructure will be formed.

KW - Al alloys

KW - Continuous confined strip shearing

KW - Continuous grain growth

KW - Discontinuous grain growth

KW - Severe plastic deformation

KW - Ultra-fine grain

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Stability against coarsening in ultra-fine grained aluminum alloy AA 3103 sheet fabricated by continuous confined strip shearing

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Keywords

ASJC Scopus subject areas

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