Band Structure Formation Mechanism in Directionally Solidified Al-38.5%Cu Alloy

TANG Ling; LI Shuang-ming; AI Tao-tao; LI Wen-hu; FENG Xiao-ming

Materials and Mechanical Engineering > 2010 > 34(4): 31-34.

TANG Ling, LI Shuang-ming, AI Tao-tao, LI Wen-hu, FENG Xiao-ming. Band Structure Formation Mechanism in Directionally Solidified Al-38.5%Cu Alloy[J]. Materials and Mechanical Engineering, 2010, 34(4): 31-34.

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Band Structure Formation Mechanism in Directionally Solidified Al-38.5%Cu Alloy

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Received Date: July 17, 2009

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Abstract

The formation mechanism of the band structure formed during the alternative growth of single phase Al2Cu and eutectic phase Al/Al2Cu in solidified microstructure of Al-38.5% Cu alloy was studied when the growth rate was 1 μm·s-1 and the temperature gradient was 260 K·cm-1 in liquid.The results show that the formation of band structure was related to the solute distribution ahead of solid-liquid interface due to the changes of the growth rate and alloy composition during directional solidification.With the increase of the liquid solute content of the single phase,the solidification rate of the alloy decreased,but in the growth of coupled eutectic phase the solidification rate increased.
- Al-38.5%Cu alloy,
- directional solidification,
- band structure,
- solute distribution

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[1]	BURDEN M H,HUNT J D.Cellular and dendritic growth[J].J Cryst Growth,1974,22(2):109-116.
[2]	ELLIOTT R.Eutectic solidification processing-crystalline and glassy alloys[M].London: Butterworths,1983:92-156.
[3]	TRIVEDI R,MASON J T,VERHOEVEN J D,et al.Eutectic spacing selection in lead-based alloy systems[J].Metall Trans,1991,22A:2523-2533.
[4]	TRIVEDI R,MAGNIN P,KURZ W.Theory of eutectic growth under rapid solidification conditions[J].Acta Metall,1987,35(4):971-980.
[5]	李双明,刘林,李晓历.包晶合金定向凝固平界面前沿的形核分析[J].金属学报,2004,40(1):20-26.
[6]	李新中,郭景杰,苏彦庆.定向凝固包晶合金带状组织的形成机制及相选择 I.带状组织的形成机制[J].金属学报,2005,41(6):593-598.
[7]	郭景杰,李新中,苏彦庆.定向凝固包晶合金带状组织的形成机制及相选择 II.相选择[J].金属学报,2005,41(6):599-604.
[8]	KRAFT R W,ALBRIGHT D L.Microstructure of unidirectionally solidified Al-CuAl2 eutectic[J].Trans of the Metallurgical Society of Aime,1961,221:95-101.
[9]	刘安生.二元合金状态图集[M].北京,冶金工业出版社,2004:29.
[10]	LEE J H,LIU Shan,TRIVEDI R.The effect of fluid flow on eutectic growth[J].Metall Mater Trans A,2005,36:3111-3125.
[11]	HAN S H,TRIVEDI R.Banded microsturctures formation in off-eutectic alloys[J].Metall Mater Trans A,2000,31:1819.
[12]	WARREN J A,LANGER J S.Effect of the composition on microstructure and mechanical properities of Ti-Al binary alloys[J].Phys Rev E,1993,47:2702-2712.
[13]	MOLLARD F R.Growth of composites from the melt-partⅠ[J].Trans Metall Soc,1967,239:1526-1533.
[14]	MOLLARD F R.Growth of composites from the melt-partⅡ[J].Trans Metall Soc,1967,239:1534-1546.

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