Shear-assisted extrusion with variable extrudate properties
AssigneeBattelle Memorial Institute
InventorsMageshwari Komarasamy, Scott A. Whalen, Glenn J. Grant, Brandon Scott Tayson
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Abstract
A method for shear-assisted extrusion of a billet or feedstock can involve extruding a first portion of the feedstock through a die opening while rotating the die face relative to the feedstock at a first rotational rate and applying a first axial extrusion force. A second portion of the feedstock can be extruded through the opening while rotating the die face at a second rotational rate and applying a second axial extrusion force. This can establish different temperature ranges at the interface for each portion, resulting in a first extruded portion with different physical properties than the second extruded portion.
Claims20
A method for shear-assisted extrusion of a billet or other feedstock, the method comprising:
- extruding a first portion of the feedstock through an opening defined by a die tool, the extruding comprising establishing rotation of a die tool face relative to a feedstock material according to first specified operating parameters and, contemporaneously, applying an axial extrusion force to drive the feedstock and the die tool face together according to the first specified operating parameters;
- and
- extruding a second portion of the feedstock through the opening defined by the die tool, the extruding comprising establishing rotation of the die tool face relative to the feedstock material according to second specified operating parameters and contemporaneously, applying the axial extrusion force to drive the feedstock and the die tool face together according to the second specified operating parameters, wherein at least one of the second specified operating parameters is different than at least one of the first specified operating parameters to establish different specified temperature ranges at an interface between the die tool face the feedstock such that a first portion of a resulting extrudate along a first axial region extruded from the first portion of the feedstock comprises one or more different physical properties than a second portion of the resulting extrudate along a second axial region extruded from the second portion of the feedstock.
A shear-assisted extrusion product, comprising:
- a first portion of extrudate along a first axial region extruded from a first portion of a feedstock;
- a second portion of extrudate along a second axial region extruded from a second portion of a same feedstock;
- and
- a transition region between the first axial region and the second axial region;
- wherein the first portion of the extrudate comprises one or more different physical properties than the second axial portion.
A system for shear-assisted extrusion of a billet or other feedstock, the system comprising:
- a die tool, comprising a die tool face and defining an opening for extruding a first portion of the feedstock therethrough, the die tool configured to have relative rotational motion relative to a feedstock material according to first specified operating parameters;
- a driver configured to apply an axial extrusion force to drive the feedstock and the die tool face together, during the relative rotational motion and according to the first specified operating parameters;
- and
- a system controller configured to establish or adjust rotation of the die tool face relative to the feedstock material according to second specified operating parameters and contemporaneously, establish or adjust the axial extrusion force to drive the feedstock and the die tool face together according to the second specified operating parameters;
- wherein at least one of the second specified operating parameters is different than at least one of the first specified operating parameters to establish different specified temperature ranges at an interface between the die tool face the feedstock such that a first portion of a resulting extrudate along a first axial region extruded from the first portion of the feedstock comprises one or more different physical properties than a second portion of the resulting extrudate along a second axial region extruded from the second portion of the feedstock.
Dependencies are inferred from the claim text.