Al-Mg合金鋳塊の高温変形挙動に及ぼすマグネシウム濃度の影響

堀江 史郎; 中村 正久; 福沢 康

doi:10.2464/jilm.34.78

Effect of magnesium concentration on the hot deformation of aluminum-magnesium alloy ingots

Shiro HORIE, Tadahisa NAKAMURA, Yasushi FUKUZAWA

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JOURNAL FREE ACCESS

1984 Volume 34 Issue 2 Pages 78-85

DOI https://doi.org/10.2464/jilm.34.78

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Published: February 28, 1984 Received: June 10, 1983 Available on J-STAGE: July 23, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 23, 2008 Reason for correction: - Correction: CITATION Details: Wrong : 2) H. P. StÜwe: Acta. Met., 13 (1965), 1337.
3) H. J. McQueen: J. Metals, 20 (1968), 31.
4) C. M. Sellers and W. J. McG, Tegart.: Acta. Met., 14 (1966), 1136.
5) J. J. Jonas, H. J. McQueen and W. A. Wong: ISJ. Special Report, No, 108 (1968), 21.
6) H. J. McQueen, W. A. Wong and J. J. Jonas: Can. J. Phys., 45 (1967), 1225.
7) H. J. McQueen and J. E. Hocket: Met. Trans., 1 (1970), 2997.
8) E. Shapiro and G. E. Hocket: Met. Trans., (1971), 1385.
9) Y. Ohtakara, T. Nakamura and S. Sakui: Trans. ISIJ, 12 (1972), 36.
11) C. M. Ransley and D. E. Talbot: J. Inst. Metals, 88 (1959~60), 150.
13) A. Nadai: "Theory of Flow and Fracture of Solid", (1950), New York, McGraw-Hill, 347~349.
14) D. Hardwick and W. J. McG. Tegart: J. Inst, Metals, 90 (1961~62), 17.

Right : 2) H. P. StÜwe: Acta. Met., 13 (1965), 1337.
3) H. J. McQueen: J. Metals, 20 (1968), 31.
4) C. M. Sellers and W. J. McG, Tegart.: Acta. Met., 14 (1966), 1136.
5) J. J. Jonas, H. J. McQueen and W. A. Wong: ISJ. Special Report, No, 108 (1968), 21.
6) H. J. McQueen, W. A. Wong and J. J. Jonas: Can. J. Phys., 45 (1967), 1225.
7) H. J. McQueen and J. E. Hocket: Met. Trans., 1 (1970), 2997.
8) E. Shapiro and G. E. Hocket: Met. Trans., (1971), 1385.
9) Y. Ohtakara, T. Nakamura and S. Sakui: Trans. ISIJ, 12 (1972), 36.
11) C. M. Ransley and D. E. Talbot: J. Inst. Metals, 88 (1959~60), 150.
13) A. Nadai: "Theory of Flow and Fracture of Solid", (1950), New York, McGraw-Hill, 347-349.
14) D. Hardwick and W. J. McG. Tegart: J. Inst, Metals, 90 (1961~62), 17.

Date of correction: July 23, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

The effect of magnesium content on the transition process of dynamic restoration during hot deformation of aluminum alloys was investigated. The hot workability of Al-Mg casting alloys were estimated by the observation of the deformation stress, ductlity and deformation structure in hot torsion tests. These tests were conducted on pure aluminum and Al-Mg alloys under the conditions of a strain rate range of 1.45 × 10^-3 to 2.54 × 10^-1sec^-1 and temperature range of 300 to 600°C.
The dynamic restoration process was two folds; for pure aluminum, the dynamic restoration was always by dynamic recovery; but the dynamic restoration in Al-Mg alloys were changed dynamic recovery to dynamic recrystallization which were controlled by magnesium contents and deformation condition (strain rate and temperature).
The ductility of Al-Mg alloys at high temperature deformation was dependent on the dynamically recrystallized grain size. The grain size increased with increasing magnesium content and decreased with the increase of Z factor.

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