Crack Formation in Chill Block Melt Spinning Solidification Process: A Comparative Analysis Using OpenFOAM®

JOM ◽  
2022 ◽  
Author(s):  
M. R. Pagnola ◽  
F. Barceló ◽  
J. Useche
2010 ◽  
Vol 667-669 ◽  
pp. 997-1002
Author(s):  
Tomasz Tokarski

Magnesium and its alloys are attractive candidates for automotive and aerospace applications due to their relatively high strength and low density. However, their low ductility determined by hcp structure of material results in limitation of plastic deformation processing. In order to improve ductility as well as mechanical properties, structure refinement processes can be used. It is well known that effective refining of the material structure can be achieved by increasing the cooling rate during casting procedures, hence rapid solidification process (RSP) has been experimented for the fabrication of magnesium alloys. The present paper reports an experimental investigation on the influence of rapid solidification on the mechanical properties of AM60 magnesium alloy. In order to obtain RS material melt spinning process was applied in protective atmosphere, resulting in formation of RS ribbons. Following consolidation of the RS material is necessary to obtain bulk material with high mechanical properties, as so hot extrusion process was applied. It was noticed that application of plastic consolidation by hot extrusion is the most effective process to achieve full densification of material. For comparison purposes, the conventionally cast and hot extruded AM60 alloy was studied as well. The purpose of the present study was to investigate in detail the effect of rapid solidification and extrusion temperature on the structure and mechanical properties of the materials.


2020 ◽  
Vol 150 ◽  
pp. 106221
Author(s):  
Marcelo Barone ◽  
Francisco Barceló ◽  
Marcelo Pagnola ◽  
Axel Larreteguy ◽  
Andrés G. Marrugo ◽  
...  

2015 ◽  
Vol 11 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Marcelo R. Pagnola ◽  
Marcelo Barone ◽  
Mariano Malmoria ◽  
Hugo Sirkin

Purpose – The purpose of this paper is to present an analysis over own and other authors data related to the process of Chill Block Melt Spinning (CBMS) and propose a model of analysis for interpreting. Design/methodology/approach – The methodology used in this work is to present the data analyzed by other authors, organize own data similarly to establish comparison, and established models and propose a possible physical processes interpretation. Findings – Similarity between own experimental data. with others data reported by other authors, both z/w ratio and the thicknesses of the films produced has been found. This allows us to establish an exponential decay of the parameters studied and possibly link it the Newtonian cooling to which the samples are subjected in its production. Research limitations/implications – This work is the first model set up to predict dimensions in design process by CBMS as a function of parameters of the ribbon production process. Practical implications – The prediction of the product dimensions, with adjusting the initial parameters, allows to improve the process of ribbon production, this saves tuning time of the machine and provides certainty in the molten material ejection. Social implications – The efficient production of magnetic materials lets save efforts in the raw material process preparing in magnetic cores for the energy sector. This, improves production besides benefit society by the final product and the energy savings. Originality/value – The value of this paper is to propose a model of analysis that allows standardize production parameters, and could even allow the use of these models in computer programs, process simulators in a more effective manner.


2013 ◽  
Vol 446-447 ◽  
pp. 352-355 ◽  
Author(s):  
M. Sowjanya ◽  
T. Kishen Kumar Reddy ◽  
B. Srivastha ◽  
B. Majumdar

Planar flow melt spinning (PFMS) is a rapid solidification process to produce amorphous ribbons for transformer core applications. The present study deals with the development of 3dimensional time-dependent model, for the numerical simulation of ribbon formation during the PFMS process. Space between nozzle wall and the rotating wheel is considered as the computational domain. Volume of fluid technique is applied along with energy and momentum equations to simulate the two phase flow in the domain. Effect of ejection temperature of the melt is investigated during ribbon formation. Ribbon patterns like dimple and continuous are obtained for different ejection temperatures. Phenomenon of air entrainment which leads to dimple pattern is discussed. Vacuum conditions are suggested to avoid air entrainment.


1987 ◽  
Vol 22 (3) ◽  
pp. 798-802 ◽  
Author(s):  
Kevin J. Hemker ◽  
Thomas K. Glasgow

Sign in / Sign up

Export Citation Format

Share Document