Microstructure and phase selection in containerless processing of Fe-Ni droplets
Microstructure and phase selection in containerless processing of Fe-Ni droplets
复制标题
DOI：
10.1016/s1359-6454(98)00141-4
复制
发表时间：
1998-08
期刊：
影响因子：
9.4
通讯作者：
A. Zambon;B. Badan;K. Eckler;F. Gärtner;A. Norman;A. L. Greer;D. Herlach;E. Ramous
中科院分区：
文献类型：
--
作者：
A. Zambon;B. Badan;K. Eckler;F. Gärtner;A. Norman;A. L. Greer;D. Herlach;E. Ramous
Fe-Ni 液滴（Ni 含量 0-30at.%）通过电磁悬浮、滴管或雾化进行无容器处理。液滴直径从10μm到7mm不等。 b.c.c.的形成之间的竞争。和 c.c.p.通过研究重辉行为和枝晶生长速度作为过冷的函数来阐明相。对于悬浮，结果总结在相选择图中。对于喷雾方法中产生的液滴，构建了一个选择图，将主要相和微观结构（粗枝晶或晶粒细化）与成分和液滴尺寸联系起来。最终微观结构、晶相和加工条件之间建立了联系。热力学建模 (CALPHAD) 和枝晶生长速度分析用于分析成核和生长行为。
Fe–Ni droplets (Ni content 0–30at.%) were containerlessly processed by electromagnetic levitation, in a drop-tube or by atomization. The droplet diameter varied from 10μm to 7mm. The competition between the formation of b.c.c. and c.c.p. phases is elucidated by studies of the recalescence behaviour and the dendrite growth velocities as a function of undercooling. For levitation the results are summarized in a phase-selection map. For droplets produced in the spray methods, a selection map was constructed which relates the predominant phases and microstructures (coarse-dendritic or grain-refined) to the composition and the droplet size. Links are established between the final microstructures, the crystal phases and the processing conditions. Thermodynamic modelling (CALPHAD) and an analysis of dendrite growth velocities are used to analyse the nucleation and growth behaviour.