A numerical model for the prediction of the wire quality produced by the novel direct machining chip recycling technique known as Friction Stir Extrusion (FSE) is presented. Wire microstructure and wire integrity have been predicted by embedding in the code the equations enabling the calculation of the Zener-Hollomon parameter as well as the W parameter of the Pivnik-Plata solid bonding criterion. The proposed model, developed for the AZ31 magnesium alloy using the commercial simulation package DEFORM, is 3D Lagrangian, thermo-mechanically coupled with visco-plastic material behavior. The model was first validated against experimental temperature measurements and then used to predict the main field variables distributions with varying process parameters.

Baffari, D., Buffa, G., Fratini, L. (2017). A numerical model for Wire integrity prediction in Friction Stir Extrusion of magnesium alloys. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 247, 1-10 [10.1016/j.jmatprotec.2017.04.007].

A numerical model for Wire integrity prediction in Friction Stir Extrusion of magnesium alloys

Baffari, Dario;BUFFA, Gianluca
;
FRATINI, Livan
2017-01-01

Abstract

A numerical model for the prediction of the wire quality produced by the novel direct machining chip recycling technique known as Friction Stir Extrusion (FSE) is presented. Wire microstructure and wire integrity have been predicted by embedding in the code the equations enabling the calculation of the Zener-Hollomon parameter as well as the W parameter of the Pivnik-Plata solid bonding criterion. The proposed model, developed for the AZ31 magnesium alloy using the commercial simulation package DEFORM, is 3D Lagrangian, thermo-mechanically coupled with visco-plastic material behavior. The model was first validated against experimental temperature measurements and then used to predict the main field variables distributions with varying process parameters.
2017
Settore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione
Baffari, D., Buffa, G., Fratini, L. (2017). A numerical model for Wire integrity prediction in Friction Stir Extrusion of magnesium alloys. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 247, 1-10 [10.1016/j.jmatprotec.2017.04.007].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/226381
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