Grain Refinement and Strengthening of a Cylindrical Pure-Aluminum Specimen by Using Modified Equal-Channel Angular Pressing Technique

Abstract:

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A new grain refinement and strengthening technique by modified ECAP (equal-channel angular pressing) technique was proposed in this study. ECAP technique is an effective technique for grain refinement and strengthening of metal material. This technique gives high shear plastic strain to the material without geometric transformation of the specimen. However, traditional ECAP technique is restricted by material type and size, especially length. Such kinds of restrictions cause various problems in practical use. We modified traditional ECAP dies and processes to allow high plastic strain for long-length pure-aluminum specimens. Then, grain distribution was observed using a microscope, grain size was determined by the Jeffries and the Heyn methods, and strengthening was investigated by micro-Vickers hardness test. Then the effectiveness of proposed grain refinement or strengthening techniques was discussed.

Info:

Periodical:

Key Engineering Materials (Volumes 340-341)

Edited by:

N. Ohno and T. Uehara

Pages:

937-942

Citation:

T. Yamane et al., "Grain Refinement and Strengthening of a Cylindrical Pure-Aluminum Specimen by Using Modified Equal-Channel Angular Pressing Technique", Key Engineering Materials, Vols. 340-341, pp. 937-942, 2007

Online since:

June 2007

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Price:

$38.00

[1] V. M. Segal, Materials processing by simple shear, Mater. Sci. Eng., A197, (1995), 157-164.

[2] R. Z. Valiev, Structure and mechanical properties of ultra fine-grained metals, Mater. Sci. Eng., A234-236, (1997), 59-66.

[3] Y. Iwahashi, J. Wang, Z. Horita, M. Nemoto and T. G. Langdon, Principle of equal-channel angular pressing for the processing of ultra-fine grained materials, Scripta Mater., 35 - 2, (1996), 143-146.

DOI: https://doi.org/10.1016/1359-6462(96)00107-8

[4] K. Nakashima, Z. Horita, M. Nemoto and T. G. Langdon, Influence of channel angle on the development of ultrafine grains in equal-channel angular pressing, Acta. Mater., 46 - 5, (1998), 1589-1599.

DOI: https://doi.org/10.1016/s1359-6454(97)00355-8

[5] Y. Wu and I. Baker, An experimental study of equal channel angular extrusion, Scripta Mater., 37 - 4, (1997), 437-442.

DOI: https://doi.org/10.1016/s1359-6462(97)00132-2

[6] P. B. Prangnell, C. Harris and S. M. Roberts, Finite element modeling of equal channel angular extrusion, Scripta Mater., 37 - 7, (1997).

DOI: https://doi.org/10.1016/s1359-6462(97)00192-9

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