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Weld purging is the act of removing, from the vicinity of the joint; oxygen, water vapour and any other gases or vapours that might oxidize or contaminate a welding joint as it is being welded and immediately after welding. [1] Stainless steels, duplex steels, titanium-, nickel- and zirconium- alloys are sensitive to the presence of air, oxygen ...
Structural steel welding - Welding of steel structures subject to high levels of fatigue loading AS/NZS 1554.6: Structural steel welding - Welding stainless steels for structural purposes AS/NZS 1554.7: Structural steel welding - Welding of sheet steel structures AS/NZS 3992: Pressure equipment - Welding and brazing qualification AS/NZS 4855
A common case of embrittlement during manufacture is poor arc welding practice, in which hydrogen is released from moisture, such as in the coating of welding electrodes or from damp welding rods. [ 22 ] [ 31 ] To avoid atomic hydrogen formation in the high temperature plasma of the arc , welding rods have to be perfectly dried in an oven at ...
Steel and concrete have similar coefficients of thermal expansion, [2] so a concrete structural member reinforced with steel will experience minimal differential stress as the temperature changes. Other readily available types of rebar are manufactured of stainless steel, and composite bars made of glass fiber, carbon fiber, or basalt fiber.
The energy from the impact plasticizes the materials, forming a weld, even though only a limited amount of heat is generated. The process is commonly used for welding dissimilar materials, including bonding aluminum to carbon steel in ship hulls and stainless steel or titanium to carbon steel in petrochemical pressure vessels. [66]
Close-up view of a friction stir weld tack tool. The bulkhead and nosecone of the Orion spacecraft are joined using friction stir welding. Joint designs. Friction stir welding (FSW) is a solid-state joining process that uses a non-consumable tool to join two facing workpieces without melting the workpiece material.