Coarsening Kinetics of Semi-solid A356-5wt%TiB2 in situ Composite

被引：5
|
作者：
Kumar, S. Deepak [1 ]
Acharya, Mihira [2 ]
Mandal, A. [2 ]
Chakraborty, M. [3 ]
机构：
[1] Indian Inst Technol Bhubaneswar, Sch Mech Sci, Bhubaneswar 751007, Odisha, India
[2] Indian Inst Technol Bhubaneswar, Sch Minerals Met & Mat Engn, Bhubaneswar 751007, Odisha, India
[3] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2015年 / 68卷 / 06期
关键词：
Cooling slope casting; Coarsening; A356; alloy; TiB2; Ostwald ripening; MICROSTRUCTURAL EVOLUTION; A356; ALLOY; BEHAVIOR;
D O I：
10.1007/s12666-015-0648-z
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
An attempt has been made to investigate the coarsening behaviour of semisolid A356-5wt%TiB2 in situ composite produced by Cooling slope casting. It was found that the average grain size of alpha-Al in the gravity-cast alloy got reduced from 98 to 48 A mu m in the semi-solid A356-5TiB(2) composite. The primary alpha-Al in the composite were found to undergo substantial spheroidisation after 5 min at a reheating temperature of 585 A degrees C (f (s) = 0.5). Further, increase in holding time from 5 to 15 min resulted in grain growth of alpha-Al in both the alloy and the composites. The coarsening rate constant, K, for A356-5wt%TiB2 composite was found to be 339.73 mu m(3)/s which is 32 % lower than that of semi-solid A356 alloy, thus proving the effectiveness of TiB2 particles towards grain coarsening.
引用
收藏
页码：1075 / 1080
页数：6
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