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Welding – Friction Stir

Idaho National Laboratory

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Technology Marketing Summary

Friction welding that uses a contact rotating tool creates frictional heating of an adjacent work piece. The process employs a mixer where the two pieces touch, an area called the plastic zone, to avoid the undesirable joining (e.g. alloying) of the two work pieces.


First, a material-forming tool is used which is designed with a shank and shoulder that can release to engage the shank portion. A pin can be released to engage the shoulder portion, but also opens a passageway allowing a source of a material to flow in relation to the pin. A mixture of materials is created by placing the “material B” into contact with “material A” and using the tool to plastically deform the “material A” to form a novel material having characteristics different from the original materials.


-        Allows for welding with no alloying effects

-        Forms a material that has different characteristics from the original

Applications and Industries

Friction stir, friction welding, friction welding tool, welding

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Patent 7,357,292
Friction stir welding tool
A friction stir welding tool is described and which includes a shank portion; a shoulder portion which is releasably engageable with the shank portion; and a pin which is releasably engageable with the shoulder portion.
Idaho National Laboratory 04/15/2008
Patent 7,597,236
Method for forming materials
A material-forming tool and a method for forming a material are described including a shank portion; a shoulder portion that releasably engages the shank portion; a pin that releasably engages the shoulder portion, wherein the pin defines a passageway; and a source of a material coupled in material flowing relation relative to the pin and wherein the material-forming tool is utilized in methodology that includes providing a first material; providing a second material, and placing the second material into contact with the first material; and locally plastically deforming the first material with the material-forming tool so as mix the first material and second material together to form a resulting material having characteristics different from the respective first and second materials.
Idaho National Laboratory 10/06/2009
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
7357292, 7597236ProductionAvailable09/04/201209/04/2012

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To: Ryan Bills<>