A method for braze repair of tight cracks in a superalloy component is provided. The method includes directing energy, e.g., from an acoustic energy source, towards surfaces of the tight crack to break up one or more contaminants, corrosion products, or oxides at the surface. The directed energy may cause opposed walls of the tight crack to vibrate to break up the oxides, and to generate a modest heat for allowing infiltration of the tight crack with a braze material. The braze material is then melted at a melt temperature of the braze material but below the melt temperature of the component. The braze material is then solidified to repair the tight crack.

A method for braze repair of tight cracks in a superalloy component is provided. The method includes directing energy, e.g., from an acoustic energy source, towards surfaces of the tight crack to break up one or more contaminants, corrosion products, or oxides at the surface. The directed energy may cause opposed walls of the tight crack to vibrate to break up the oxides, and to generate a modest heat for allowing infiltration of the tight crack with a braze material. The braze material is then melted at a melt temperature of the braze material but below the melt temperature of the component. The braze material is then solidified to repair the tight crack.

A system for joining articles includes a joining unit; a positioning unit coupled to the joining unit, the positioning unit positioning the joining unit; a vision system obtaining an image of an item to be joined on a workpiece; a controller for processing the image and controlling a position of the joining unit relative to the item to be joined in response to the image; and a temperature probe for monitoring a temperature; wherein the controller adjusts the position of the joining unit in response to the temperature.

A system for joining articles includes a joining unit; a positioning unit coupled to the joining unit, the positioning unit positioning the joining unit; a vision system obtaining an image of an item to be joined on a workpiece; a controller for processing the image and controlling a position of the joining unit relative to the item to be joined in response to the image; and a temperature probe for monitoring a temperature; wherein the controller adjusts the position of the joining unit in response to the temperature.

A harrow spring tine having a tine shaft that carries a distinct, separately formed cutting edge member body, formed of a hardened material such as tungsten carbide and/or a material having a longer wear life relative to material of the tine shaft and brazed directly to the tine shaft, to provide optimum durability and wear resistance on an area of the tine shaft extending a short distance upward from the bottom end of the tine shaft, where the most ground contact will occur during use of the tine.

A harrow spring tine having a tine shaft that carries a distinct, separately formed cutting edge member body, formed of a hardened material such as tungsten carbide and/or a material having a longer wear life relative to material of the tine shaft and brazed directly to the tine shaft, to provide optimum durability and wear resistance on an area of the tine shaft extending a short distance upward from the bottom end of the tine shaft, where the most ground contact will occur during use of the tine.

A brazing joint, a brazing method, and a device for promoting solder rheology and gas overflow are provided. The brazing joint includes a first base metal, a second base metal, and a brazing seam located therebetween. The brazing seam is formed by filling a solder in a gap formed by welding surfaces of the first and the second base metal and melting it to connect the first and the second base metal. The brazing seam is a concave-shaped brazing seam. The gap defines a first distance and a second distance, the first distance is located at an edge of the gap, the second distance is located at the edge or an inside of the gap, the first distance is greater than the second distance, and a curved surface is formed between the location of the first distance and the location of the second distance for transition.

A brazing joint, a brazing method, and a device for promoting solder rheology and gas overflow are provided. The brazing joint includes a first base metal, a second base metal, and a brazing seam located therebetween. The brazing seam is formed by filling a solder in a gap formed by welding surfaces of the first and the second base metal and melting it to connect the first and the second base metal. The brazing seam is a concave-shaped brazing seam. The gap defines a first distance and a second distance, the first distance is located at an edge of the gap, the second distance is located at the edge or an inside of the gap, the first distance is greater than the second distance, and a curved surface is formed between the location of the first distance and the location of the second distance for transition.

A thermal interface material and method of making the same includes growing a carbon nanotube array on a first substrate and brazing the distal ends of the carbon nanotube array to a second substrate using a braze material. In at least one embodiment, the braze material includes active elements. The method further includes performing the brazing process in an inert or vacuum atmosphere.

A thermal interface material and method of making the same includes growing a carbon nanotube array on a first substrate and brazing the distal ends of the carbon nanotube array to a second substrate using a braze material. In at least one embodiment, the braze material includes active elements. The method further includes performing the brazing process in an inert or vacuum atmosphere.