A method for repairing a defect affecting a weld. A sheet of filler metal is placed on the surface of the welded part, next to the region of the defect. The sheet is locally welded to the welded part in the region of the defect using a friction stir welding tool having a retractable welding pin. The welded part and the sheet are separated such that the filler metal amalgamated with the metal of the welded part remains in position. The local welding operation includes successively performing the following: setting the welding tool into rotation and putting it under pressure; inserting the pin to a small distance from the anvil while maintaining or increasing the pressure on the shoulder of the welding tool; progressively retracting the pin while maintaining or increasing the pressure on the shoulder; and stopping the pressure on the shoulder when the retractable pin has been retracted.

A method for manufacturing a hollow container with use of a rotary tool including a tapered stirring pin, including: preparing a first metal member, a second metal member, and an auxiliary member; butting the first metal member and the second metal member to face with each other, the auxiliary member is interposed between the first metal member and the second metal member; and joining the first metal member with the second metal member via the auxiliary member. The first and second metal members, and the auxiliary member are made of aluminum or an aluminum alloy, and the first and second metal members have higher hardness than the auxiliary member. At least one of the first and second metal members has an inclined surface inclined outward, and the auxiliary member has an inclined surface, tapered from the external surface toward an internal surface, on at least one of the side surfaces.

A powder-enhanced friction stir rivet welding device includes a friction stir rivet welding spindle, a C-shaped frame and a tooling platform. The friction stir rivet welding spindle includes a rotating mechanism, a feed mechanism, a vibration-rotation mixing mechanism and a powder feeding mechanism. The friction stir rivet welding spindle is configured to realize rotation and feed movements of a rivet and feeding and mixing of a powder. The C-shaped frame is configured to fix the friction stir rivet welding spindle and the tooling platform. The tooling platform includes a force sensor, a sensor indenter, a tooling mould and a tooling platen. The tooling platform is configured to clamp a workpiece to be riveted and welded, and measure a rivet welding force of the friction stir rivet welding spindle in real time.

Disclosed is a friction stir welding tool with an adjustable probe length and shoulder groove depth, wherein a support shaft, made of a material having low thermal conductivity so as to inhibit thermal conduction between a probe and a shank, is coupled to the center of an upper locking member together with the shank, the probe and inner and outer shoulders are coupled inside a lower part of the upper locking member, and a lower locking member is fastened and fixed to the lower part of the upper locking member, and a washer and a locking nut are fastened to an upper part of the lower locking member, whereby the locking nut pushes the lower locking member via the washer.

A method of depositing an extrudate onto a substrate, the method including steps of rotating a stirring tool about an axis of rotation while urging a tool distal end of the stirring tool against the substrate, and wherein the stirring tool defines a bore, extending therethrough; positioning a die adjacent to the stirring tool, such that the stirring tool rotates relative to the die; and passing feedstock through the bore toward the tool distal end.

A method for loading feedstock bars into an additive friction stir deposition machine (AFSD) is described. The method comprises containing a plurality of feedstock bars in a container disposed adjacent to a spindle of the additive friction stir deposition machine. The method further comprises moving one feedstock bar of the plurality of feedstock bars into axial alignment with the spindle of the additive friction stir deposition machine.

The present invention includes a joining process in which a first metal member and a second metal member are joined with an auxiliary member interposed therebetween by moving a rotary tool along a butted portion in a state where the rotary tool being rotated is inserted only from a front face side of the auxiliary member, only a stirring pin is in contact with the auxiliary member, a base end side of the stirring pin is exposed, and an outer circumferential face of the stirring pin is slightly in contact with the first metal member and the second metal member, and the auxiliary member is provided with an inclined face on at least one side face in such a form that the auxiliary member has a smaller dimension with increasing distance from a front face, and at least one of the first metal member and the second metal member is provided with an inclined face corresponding to the inclined face of the auxiliary member and inclined from the front face toward a back face.

A dissimilar metal article may include a first metallic component including a first metal material, a second metallic component comprising a second metal material, and a transition joint provided between and bonding a first metallic component first end surface to a second metallic component first end surface. An additive flow material may be further provided to the dissimilar metal article to strengthen the joint between the first metallic component and the second metallic component.

A solid-state additive manufacturing additive manufacturing system applicable to building up 3D structures, coating and functionalizing surfaces, joining structures, adding customized features to objects, compounding proprietary compositions and repairing various structures is disclosed. The solid-state additive manufacturing system enables deposition of different fillers, viz. metals, metal alloys, MMCs, polymers, plastics, composites, hybrids and gradient compositions, as well as controls the resulting deposit structures, e.g. specific nano-/micro-, gradient- and porous-material structures. The system accommodates various feeding-, spindle- and tool-designs for depositing different forms of filler materials, viz. rods, wires, granules, powders, powder-filled-tubes, scrap pieces or their combination, and a working platform with multiple access points. One or multiple motors, driving and monitoring units control the movement of the workpiece, spindle and tool and move the filler through the feeding system, which passageway is in communication with the passageways of the spindle and the tool.

Provided is a method for manufacturing a liquid cooling jacket including a jacket body and a sealing body joined to the jacket body. The method includes steps of: preparing; placing; first primary joining with a rotary tool; and second primary joining with the rotary tool. The rotary tool includes a base end pin and a distal end pin. The distal end pin includes a flat surface and a protrusion protruding from the flat surface. In the first primary joining and the second primary joining, friction stirring is performed in a state where the jacket body and the sealing body are brought in contact with the flat surface of the distal end pin and the base end pin and only the jacket body is brought in contact with a distal end surface of the protrusion.