Providing Plastic Zone Extrusion
Plastic zone extrusion may be provided. First, stock may be placed in a chamber. Then frictional heat may be generated within the stock to heat the stock to a plastic zone of the stock in the chamber. The stock may then be extruded through an orifice in the chamber after the stock is at the plastic zone.
1 . A method for providing plastic zone extrusion, the method comprising:
placing stock into a chamber;
generating frictional heat within the stock to heat the stock to a plastic zone of the stock in the chamber; and
extruding, through an orifice in the chamber, the stock after the stock is at the plastic zone.
2 . The method of claim 1 , wherein placing stock into the chamber comprises placing swarf into the chamber.
3 . The method of claim 1 , wherein placing stock into the chamber comprises placing nano-particles into the chamber.
4 . The method of claim 3 , wherein the nano-particles comprise at least one of the following: aluminum oxide, silicon carbide, copper, and carbon nano-tubes.
5 . The method of claim 1 , wherein generating the frictional heat within the stock comprises:
rotating the orifice; and
applying pressure to the stock.
6 . The method of claim 1 , wherein generating the frictional heat within the stock comprises creating a plasticized layer within the stock, the plasticized layer adjacent the orifice.
7 . A system of extruding a material, the system comprising:
a chamber defining a volume configured to contain stock and having an orifice;
a plunger sized to penetrate and mateably communicate within the chamber; and
a motor operative to rotate at least one of the chamber and the plunger.
8 . The system of claim 7 , wherein the chamber further comprises a die, wherein the motor is operative to rotate only the chamber and the die.
9 . The system of claim 7 , wherein the plunger further comprises a die, wherein the motor is operative to rotate only the plunge and the die.
10 . The system of claim 7 , further comprising a fusible plug located between the plunger and the stock contained in the chamber.
11 . The system of claim 7 , wherein the stock contained in the chamber comprises swarf.
12 . The system of claim 7 , wherein the stock contained in the chamber comprises nano-particles.
13 . The system of claim 12 , wherein the nano-particles comprises at least one of the following: aluminum oxide, silicon carbide, copper, and carbon nano-tubes.
14 . A method for providing friction stir, the method comprising:
softening material at a surface of a workpiece; and
mechanically stirring the softened material to cause at least one of the following:
consolidation and mechanical alloying.
15 . The method of claim 14 , wherein softening the material at the surface of the workpiece comprising pushing a rotating tool against the workpiece.
16 . The method of claim 15 , wherein pushing the rotating tool against the workpiece comprises:
penetrating the workpiece with a pin; and
pushing a shoulder against the workpiece, the rotating tool comprising the shoulder and the pin protruding from the shoulder.
17 . The method of claim 14 , further comprising:
applying nano-particles to the surface;
dispersing the nano-particles over a portion of the surface; and
mechanically alloying the nano-particles with a matrix of the softened material.
18 . The method of claim 17 , wherein dispersing the nano-particles over the portion of the surface comprises dispersing up to 20 % volume fraction of nano-particles over the portion of the surface.
19 . The method of claim 18 , wherein the nano-particles comprise an Al-Al 2 O 3 nano-composite.