고분해능 전자현미경을 이용한 Mg-6 wt%Zn-1 wt%Y 합금의 석출거동에 관한 연구

백상열; 이갑호; 김택수; Sang Yeol Baek; Kap Ho Lee; Taek Soo Kim

Korean Journal of Materials Research, Vol.18, No.7, 362-366, July, 2008

DOI10.3740/MRSK.2008.18.7.362 Export Citation

고분해능 전자현미경을 이용한 Mg-6 wt%Zn-1 wt%Y 합금의 석출거동에 관한 연구

HRTEM Study of Precipitation Behavior in Mg-6 wt%Zn-1 wt%Y Alloy

백상열, 이갑호^†, 김택수¹

충남대학교 공과대학 나노공학부
¹한국생산기술연구원 신소재본부

Sang Yeol Baek, Kap Ho Lee^†, and Taek Soo Kim¹

Division of Nano Technology, Chungnam National University, Daejeon 305-764, Korea
¹Techno-Park Songdo, Korea Institute of Industrial Technology(KITECH), Yeonsu, Incheon 406-130, Korea

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The precipitation behavior in Mg-6 wt%Zn-1 wt%Y alloy annealed at different temperatures of 200oC and 400oC has been characterized by high resolution transmission electron microscope. When the alloy is annealed at 200oC for 6 hr, the plate- and the rod-shaped β2' phases are precipitated in the matrix. The orientation relationship of plate-shaped precipitates with the matrix exhibits a [11 0]β2 '|| [10 0]Mg, (0001)β2 '|| (0001)Mg. While the rod-shaped precipitates have two kinds of the orientation relationships with the matrix, i.e. [11 0]β2 '||[0001] Mg, (0001)β2 '||(11 0) Mg and [11 0]β2 '||[0001] Mg, ( 106)β2 '||(10 0) Mg. With increasing annealing time at 200oC the β1' phases are also precipitated in the matrix and the orientation relationship exhibits a [010]β1 '|| [0001]Mg, (603)β1 '|| (01 0)Mg between the β1' precipitate and the matrix. The icosahedral phases are precipitated in the alloy annealed at 400oC and exhibit a [I2]I|| [0001]Mg relationship with the matrix.

Keywords:Mg-Zn-Y alloy;precipitation;orientation relationship;high resolution transmission electron microscopy

[References]

Zhang MX, Kelly PM, Scripta Mater., 48, 379 (2003)
Nie JF, Scripta Mater., 48, 1009 (2003)
Hall EO, J. Inst. Metals, 96, 21 (1968)
Clark JB, Acta Metall., 13, 1281 (1965)
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Luo ZP, Zhang SQ, Tang YL, Zhao DS, Scripta Metall. Mater., 32, 1411 (1994)
Bae DH, Kim SH, Kim DH, Kim WT, Acta Mater., 50, 2343 (2002)
Singh A, Nakamura M, Watanabe M, Kato A, Tasi AP, Scripta Mater., 49, 417 (2003)
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Chun JS, Bryne JB, J. Mater. Sci., 4, 851 (1969)
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Komura Y, Tokunaaga K, Acta Cryst., 36B, 1548 (1980)
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Gallot J, Ral K, Graf R, Guinier A, Comptes. Rendus. Acda. Sci., 258B, 2818 (1964)
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Gao X, Nie JF, Scripta Metall., 56, 645 (2007)
Yang QB, Kuo KH, Acta Cryst. A, 43, 787 (1987)
Singh A, Tasi AP, Scripta Metall., 57, 941 (2007)
Singh A, Watanabe M, Kato A, Tsai AP, Mater. Sci. Eng. A, 385, 382 (2004)

[Referenced By]

[1] Zhang MX, Kelly PM, Scripta Mater., 48, 379 (2003)

[2] Nie JF, Scripta Mater., 48, 1009 (2003)

[3] Hall EO, J. Inst. Metals, 96, 21 (1968)

[4] Clark JB, Acta Metall., 13, 1281 (1965)

[5] Polmear IJ, Mater. Sci. Technol., 10, 1 (1994)

[6] Luo ZP, Zhang SQ, Tang YL, Zhao DS, Scripta Metall. Mater., 32, 1411 (1994)

[7] Bae DH, Kim SH, Kim DH, Kim WT, Acta Mater., 50, 2343 (2002)

[8] Singh A, Nakamura M, Watanabe M, Kato A, Tasi AP, Scripta Mater., 49, 417 (2003)

[9] Rokhlin LL, Oreshkina AA, Fiz. Metal. Metalloved., 66, 559 (1988)

[10] Chun JS, Bryne JB, J. Mater. Sci., 4, 851 (1969)

[11] Wei LY, Dunlop GL, Westengen H, Metall. Mater. Trans. A, 26, 1705 (1995)

[12] Komura Y, Tokunaaga K, Acta Cryst., 36B, 1548 (1980)

[13] Gallot J, Graf R, Comptes. Rendus. Acda. Sci., 261B, 728 (1965)

[14] Gallot J, Ral K, Graf R, Guinier A, Comptes. Rendus. Acda. Sci., 258B, 2818 (1964)

[15] Sturkey L, Clark JB, J. Inst. Metals, 88, 177 (1959)

[16] Gao X, Nie JF, Scripta Metall., 56, 645 (2007)

[17] Yang QB, Kuo KH, Acta Cryst. A, 43, 787 (1987)

[18] Singh A, Tasi AP, Scripta Metall., 57, 941 (2007)

[19] Singh A, Watanabe M, Kato A, Tsai AP, Mater. Sci. Eng. A, 385, 382 (2004)