Numerical and Analytical Modeling of Free-Jet Melt Spinning for Fe-75-Si-10-B-15 (at. %) Metallic Glasses

作者：Wang Chunbai^*; Mitra Ambar K

来源：Journal of Heat Transfer, 2014, 136(7): 072101.

DOI：10.1115/1.4027151

• melt spinning
• free-jet
• amorphous metal or alloy
• nucleation
• metallic glass formation
• rapid solidification
• computational fluid dynamics

Amorphous fiber, ribbon, or film is produced through melt spinning. In this manufacturing process, a continuous delivery of amorphous material is simultaneously dependent on the wheel spinning rate, metallic liquid viscosity, surface tension force, heat transfer inside the melt pool and along the substrate, and other parameters. An analysis of a free-jet melt spinning for fiber manufacture has been performed to relate the process control parameters with amorphous formation. We present a numerical simulation of transient impingement of a free melt jet with a rapidly rotating wheel, along with theoretical estimates of melt ribbon thickness, to investigate dynamical characteristics of the flow in melt pool. The nucleation temperature and the critical cooling rate are predicted in the paper for alloy Fe-75-Si-10-B-15 (at. %). Thermal conduction is found to dominate under-cooling in melt spinning by comparing the temperature and velocity measurements with our numerical simulation and the analytical solutions.

• 出版日期2014-7