Grain refinement of alloys by inoculation of melts

被引:142
作者
Greer, AL [1 ]
机构
[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
来源
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2003年 / 361卷 / 1804期
关键词
aluminium alloys; grain refinement; inoculation; metallic glass; nucleation; solidification;
D O I
10.1098/rsta.2002.1147
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Recent progress in understanding the inoculation of aluminium melts is reviewed. Transmission electron microscopy of inoculant particles in a metallic glass reveals details of the mechanism of nucleation of aluminium grains. While such studies define some of the conditions under which inoculation is effective or not, they do not permit a prediction of grain size. Unusually for a nucleation-related phenomenon, quantitative prediction is possible. For potent inoculation such as is practised in aluminium alloys, grain initiation is limited by inoculant particle size, occurring first on the largest particles. Simple thermal models can then describe the dependence of grain refinement on alloy content and processing conditions, and enable consideration of inoculant design.
引用
收藏
页码:479 / 494
页数:16
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