Bent dendrite growth in undercooled Fe-B alloy melts

4th International Conference on Advances in Solidification Processes

材料科学;物理学

Karrasch, C.^1,2 ; Volkmann, T.^1 ; Valloton, J.^1,3 ; Kolbe, M.^1 ; Herlach, Dm^1,2

Institute für Materialphysik im Weltraum, DLR, Cologne

51170, Germany^1

Institut für Experimentalphysik IV, Ruhr-Universitat Bochum, Bochum

44780, Germany^2

Advanced Materials and Processing Laboratory, University of Alberta, Edmonton, Canada^3

关键词: Containerless processing;    Dendritic growth;    Electromagnetic levitation;    Materials design;    Parabolic flight;    Process condition;    Solidification mode;    Undercooled melt;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/117/1/012015/pdf
DOI  :  10.1088/1757-899X/117/1/012015

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Dendritic growth is the main solidification mode in alloy casting. In order to control dendrite growth for materials design from the melt it is important to fully understand the influence of process conditions. This study stands as an experimental note observing bent dendrite growth in Fe-B alloys and suggesting possible explanations as induced by fluid flow, thermal, and concentrational diffusion or impurities. Electromagnetic levitation technique (EML) is used for containerless processing of undercooled melts under 1g and reduced gravity conditions in parabolic flight. Further investigations are needed to find a suitable explanation for the observed bent dendrite growth behaviour.