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  2. Forge welding - Wikipedia

    en.wikipedia.org/wiki/Forge_welding

    Forge welding (FOW), also called fire welding, is a solid-state welding process [1] that joins two pieces of metal by heating them to a high temperature and then hammering them together. [2] It may also consist of heating and forcing the metals together with presses or other means, creating enough pressure to cause plastic deformation at the ...

  3. Fire drill (tool) - Wikipedia

    en.wikipedia.org/wiki/Fire_drill_(tool)

    The heat eventually turns the wood at the point of contact into charcoal, which is ground to a powder by the friction, that collects into the "V" notch. Continuing operation eventually ignites the charcoal dust producing a tiny ember, which can be used to start a fire in a "tinder bundle" (a nest of stringy, fluffy, and combustible material). [4]

  4. Rotary friction welding - Wikipedia

    en.wikipedia.org/wiki/Rotary_friction_welding

    The results are for example not the same in welds made for the European Space Agency with a high turnover ω = 14000 rpm [61] or another example from Warsaw technical university 12000 rpm [41] and no typical very short friction time only 60 milliseconds [42] instead of using an standard parameters, in addition, in this case, ultra fine grain ...

  5. List of welding processes - Wikipedia

    en.wikipedia.org/wiki/List_of_welding_processes

    Friction welding: 42: FRW Thin heat affected zone, oxides disrupted by friction, needs sufficient pressure Aerospace industry, railway, land transport Friction stir welding: 43: FSW A rotating non-consumable tool is traversed along the joint line Shipbuilding, aerospace, railway rolling stock, automotive industry Friction stir spot welding: FSSW

  6. Friction welding - Wikipedia

    en.wikipedia.org/wiki/Friction_welding

    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. Heat is generated by friction between the rotating tool and the workpiece material, which leads to a softened region near the FSW tool.

  7. Friction stir spot welding - Wikipedia

    en.wikipedia.org/wiki/Friction_stir_spot_welding

    In friction stir spot welding, individual spot welds are created by pressing a rotating tool with high force onto the top surface of two sheets that overlap each other in the lap joint. The frictional heat and the high pressure plastify the workpiece material, so that the tip of the pin plunges into the joint area between the two sheets and ...

  8. Dissimilar friction stir welding - Wikipedia

    en.wikipedia.org/wiki/Dissimilar_friction_stir...

    A rotating tool plunges into the interface of parent metals, and heat input generated by the friction between the tool shoulder surface and top surface of the base metals lead to softening of the base materials. In other words, the rotational movement of the tool mixes and stirs the parent metals and create a softened pasty mixture.

  9. Friction stir processing - Wikipedia

    en.wikipedia.org/wiki/Friction_stir_processing

    In friction stir processing (FSP), a rotating tool is used with a pin and a shoulder to a single piece of material to make specific property enhancement, such as improving the material's toughness or flexibility, in a specific area in the micro-structure of the material via fine grain of a second material with properties that improve the first.(Ma) [6] Friction between the tool and workpieces ...