| Patent application number | Description | Published |
|---|
| 20090236403 | MULTIPLE PASS AND MULTIPLE LAYER FRICTION STIR WELDING AND MATERIAL ENHANCEMENT PROCESSES - Processes for friction stir welding, typically for comparatively thick plate materials using multiple passes and multiple layers of a friction stir welding tool. In some embodiments a first portion of a fabrication preform and a second portion of the fabrication preform are placed adjacent to each other to form a joint, and there may be a groove adjacent the joint. The joint is welded and then, where a groove exists, a filler may be disposed in the groove, and the seams between the filler and the first and second portions of the fabrication preform may be friction stir welded. In some embodiments two portions of a fabrication preform are abutted to form a joint, where the joint may, for example, be a lap joint, a bevel joint or a butt joint. In some embodiments a plurality of passes of a friction stir welding tool may be used, with some passes welding from one side of a fabrication preform and other passes welding from the other side of the fabrication preform. | 09-24-2009 |
| 20100252169 | Friction Stir Method for Forming Structures and Materials - Processes for forming an enhanced material or structure are disclosed. The structure typically includes a preform that has a first common surface and a recess below the first common surface. A filler is added to the recess and seams are friction stir welded, and materials may be stir mixed. | 10-07-2010 |
| 20100252170 | Friction Stir Method for Joining Complex Shapes - Methods for joining complex shapes are disclosed. The shapes joined may include multiple planar surfaces and various common surfaces. Friction stir welding may be used to weld various joints and pre-heating may be optionally employed. | 10-07-2010 |
| 20100252171 | Friction Stir Method for Joining Materials Having Different Thicknesses - Methods for joining materials having different thicknesses is provided. Friction stir material processing is typically used, and a transition piece may be friction stir welded between the materials being joined. | 10-07-2010 |
| 20110005331 | Apparatuses for Prestressing Rod-Type Specimens in Torsion for In-Situ Passive Fracture Toughness Testing in an Extremely High-Pressure Environment of Hydrogen - An in-situ specimen fixture particularly adapted for prestressing rod-type SNTT-type specimens comprising a tube and end cap wherein the specimen is secured at one end to the tube, and at the opposite end to the end cap. The end cap is rotatable relative to the tube, and may be fixedly secured for creating a torsional force prestressing the specimen enclosed within the tube. | 01-13-2011 |
| 20110005332 | Apparatus for Pre-Stress-Straining Rod-Type Specimens in Tension for In-Situ Passive Fracture Testing - A stress-strain testing apparatus imposes a stress-strain on a specimen while disposed in a controlled environment. Each end of the specimen is fastened to an end cap and a strain gage is attached to the specimen. An adjusting mechanism and a compression element are disposed between the end caps forming a frame for applying forces to the end caps and thereby stress-straining the specimen. The adjusting mechanism may be extended or retracted to increase or decrease the imposed stress-strain on the specimen, and the stress-strain is measured by the strain gage on the specimen while the apparatus is exposed to an environment such as high pressure hydrogen. Strain gages may be placed on the frame to measure stress-strains in the frame that may be caused by the environment. | 01-13-2011 |
