Grain refinement of alloys by inoculation of melts
Grain refinement of alloys by inoculation of melts
复制标题
DOI：
10.1098/rsta.2002.1147
复制
发表时间：
2003-03-15
期刊：
影响因子：
5
通讯作者：
Greer, AL
中科院分区：
文献类型：
--
作者：
Greer, AL
综述了铝熔体孕育处理的最新进展。金属玻璃中孕育剂颗粒的透射电子显微镜揭示了铝晶粒成核机制的细节。虽然这些研究定义了一些条件下，接种是有效的或无效的，他们不允许预测晶粒尺寸。不寻常的是，对于成核相关的现象，定量预测是可能的。对于有效的孕育，例如在铝合金中实施的孕育，晶粒起始受到孕育剂颗粒尺寸的限制，首先发生在最大的颗粒上。然后，简单的热模型可以描述晶粒细化对合金含量和加工条件的依赖性，并能够考虑孕育剂的设计。
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.