A heat exchanger is provided and includes parting sheets and a fin sheet interposed between the parting sheets and corrugated along a first axis to form fins. Each of the fins is segmented to define gaps, which are arranged along a second axis perpendicular to the first axis, and which cooperatively accommodate curvatures of the parting sheets and the fin sheet in a third axis perpendicular to the first and second axes.

An aluminum alloy brazing sheet used for brazing in an inert gas atmosphere without using a flux includes an intermediate material and a brazing material cladded onto at least one side surface of a core material in this order from the core material side. An oxide is formed on a surface of the aluminum alloy brazing sheet by brazing heating, the oxide including any one or two or more of Mg, Li, and Ca and having a volume change ratio of 0.990 or less to a surface oxide film formed before brazing heating, and an atomic molar ratio of Mg, Li, and Ca to Al in the oxide formed on the surface of the aluminum alloy brazing sheet before brazing heating is 0.5 or less. The present invention provides an aluminum alloy brazing sheet having excellent brazability in brazing in an inert gas atmosphere without using a flux, and a method for manufacturing the same.

An aluminum alloy brazing sheet used for brazing in an inert gas atmosphere without using flux includes a core material of aluminum or aluminum alloy, and a brazing material of aluminum alloy including Si of 4.0 mass % to 13.0 mass % and cladding one side surface or both side surfaces of the core material. One or both of the core material and the brazing material includes any one or two or more types of X atoms (X is Mg, Li, Be, Ca, Ce, La, Y, and Zr). The aluminum alloy brazing sheet is a brazing sheet in which oxide particles including the X atoms and having a volume change ratio of 0.99 or lower with respect to an oxide film before brazing heating are formed on a surface thereof, by brazing heating.

An inspection system is configured to inspect the condition of a braze joint formed within a structure, wherein the braze joint is formed from a braze filler material having a tracer material disposed therein. The inspection system includes an energy source for directing energy towards the structure, an energy detector for detecting information regarding the structure following interaction with the energy directed from the energy source, and a data analysis system for analyzing the information detected by the energy detector. The data analysis system is configured to distinguish the tracer material from the remaining materials forming the structure in order to determine a suitability of the braze joint.

A base block has a longitudinal direction and a width direction and includes a recessed part in which a heat receiving tubular portion is accommodated, and a container part of a heat pipe is caulked and fixed in a recessed part and a first metal part containing first metal having a melting point equal to or higher than 130° C. and equal to or lower than 400° C. and/or a first metal alloy having a melting point equal to or higher than 130° C. and equal to or lower than 400° C. is formed between the recessed part and an outer surface of the container part.

The invention relates to a rolled fin stock material from an 3xxx-series aluminium alloy comprising, in wt. %, Mn 0.7% to 2.0%, Si 0.4% to 1.5%, Zn up to 4%, Fe up to 0.8%, Zr 0.02% to 0.40%, Sc 0.01% to 0.6%, Ni up to 0.3%, Cu up to 0.5%, Mg up to 2%, Cr up to 0.3%, Ti up to 0.3%, the balance aluminium and tolerable impurities. The invention further relates to a brazed assembly of components incorporating such a fin stock material.

An aluminum alloy material comprises: Si: less than 0.2 mass %, Fe: 0.1 to 0.3 mass %, Cu: 1.0 to 2.5 mass %, Mn: 1.0 to 1.6 mass %, and Mg: 0.1 to 1.0 mass %, the balance being Al and incidental impurities. A number density of Al—Mn compound having a circle equivalent diameter of not less than 0.1 μm is not less than 1.0×10.sup.5 mm.sup.−2, and a number density of Al.sub.2Cu having a circle equivalent diameter of not less than 0.1 μm is not more than 1.0×10.sup.5 mm.sup.−2.

The invention concerns a method for the manufacturing of a clad sheet product comprising a core layer (6) and at least one cladding layer, the method comprising rolling an assembly of a core layer and at least one cladding layer and reducing the thickness to a desired gauge, the core layer being made of an aluminium alloy, the at least one cladding layer comprising a centre section (2) and at least two edge sections (4, 5) positioned at opposite sides of the centre section (2) along the edges of the at least one cladding layer, the centre section being made of a material being an aluminium alloy or a composite material comprising a matrix of aluminium or an aluminium alloy, the edge sections along (4, 5) the edges being made of a material different from the material of the centre section, wherein the edge sections (4, 5) are cut off during or after the rolling. The invention further concerns a cladding plate useful in the method.

A first connection portion is located on one side of a predetermined flow path member in a plane direction. The predetermined flow path member and another flow path member are bonded by brazing at the first connection portion. A second connection portion is located on the other side of the predetermined flow path member. The predetermined flow path member and another flow path member are bonded by brazing at the second connection portion. A brazing material layer extends over the predetermined flow path member, the first connection portion, and the second connection portion. A hilling portion is a portion of the predetermined flow path member. The hilling portion is curved to protrude toward a side on which the brazing material layer is provided. The hilling portion extends along a direction in which the first connection portion or the second connection portion extends.

A process for producing an amorphous ductile brazing foil is provided. According to one example embodiment, the method includes providing a molten mass, and rapidly solidifying the molten mass on a moving cooling surface with a cooling speed of more than approximately 10.sup.5° C./sec to produce an amorphous ductile brazing foil. A process for joining two or more parts is also provided. The process includes inserting a brazing foil between two or more parts to be joined, wherein the parts to be joined have a higher melting temperature than that the brazing foil to form a solder joint and the brazing foil comprises an amorphous, ductile Ni-based brazing foil; heating the solder joint to a temperature above the liquidus temperature of the brazing foil to form a heated solder joint; and cooling the heated solder joint, thereby forming a brazed joint between the parts to be joined.