Forming metallic composite materials by urging base materials together under shear
AssigneeThe Welding Institute
InventorsWayne M. Thomas, Edward D. Nicholas, Stephen B. Jones
Life of this patent
Estimating the term…
Abstract
A method of forming or reforming a composite material comprises relatively rotating a pair of members (2,3) while urging them together under pressure so as to mix or remix together the materials (1) making up the composite. The urging direction is substantially parallel with the axis of relative rotation. The composite is then extruded (7).
Claims18
A method of forming or reforming a metallic composite material, the method comprising relatively rotating a pair of members while urging them together under pressure so as to mix or remix together the materials making up the composite, the urging direction being substantially parallel with the axis of relative rotation;
- and extruding the composite.
A method of reforming a metallic member, the method comprising urging the member against a die while relatively rotating the member and die whereby resultant frictional heat generates a plasticised zone;
- and extruding the member through an opening in the die whereby passage of the member through the plasticised zone causes redistribution of any discontinuities or inhomogeneities.
A method of reforming a metallic member, the method comprising urging the member against a die while relatively rotating the member and die whereby torsional shear takes place within a zone extending through at least part of the cross-section of the member;
- and extruding the member through an opening in the die whereby parent material is redistributed prior to the extrusion stage.
Dependencies are inferred from the claim text.