Manufacturing – Improved welding

February 3, 2017 by Sara Shoemaker, Oak Ridge National Laboratory
A new study evaluates the atomic behavior of metals during solid state welding and finds the resulting oxide film is dissolved near the material’s surface. Credit: Oak Ridge National Laboratory

Oxide removal for welding can be laborious and costly, yet results from a new study indicate the preparation may be unnecessary for certain solid-state joining.

An Oak Ridge National Laboratory-led research team evaluated the atomic behavior of iron and aluminum when joined through solid-state to determine the fate of resulting film build-up, a part of the process not well researched.

Solid-state welding, one of the oldest and most prominent joining techniques, begins with atomically clean materials that are free of oxides or impurities.

Through deformation and frictional heating below the , metal sections are joined completely in the solid state.

"We determined that the oxide film is not merely 'scraped off' as previously thought, but in fact dissolves in the material being welded near the surface," ORNL's Niyanth Sridharan, lead author, said. Details of the study were published in Scripta Materialia.

Explore further: Engineers mark completion of Orion's pressure vessel

More information: N. Sridharan et al. Colossal super saturation of oxygen at the iron-aluminum interfaces fabricated using solid state welding, Scripta Materialia (2017). DOI: 10.1016/j.scriptamat.2016.11.040

Related Stories

Engineers mark completion of Orion's pressure vessel

January 28, 2016

NASA's Orion spacecraft is another step closer to launching on its first mission to deep space atop the agency's Space Launch System (SLS) rocket. On Jan. 13, 2016, technicians at Michoud Assembly Facility in New Orleans ...

New spin on friction-stir

July 26, 2011

(PhysOrg.com) -- Researchers Zhili Feng, Alan Frederic and Stan David in Oak Ridge National Laboratory's Materials S&T Division have made significant progress toward a new metal processing technique, called friction-stir ...

A little light construction—laser welding in three acts

November 9, 2016

Welding is said to be more art than science. In part, this is a nod to the vital, skilled work that welders perform. It's also recognition of the fact that the physics of the process is really, really difficult to understand.

Recommended for you

New battery gobbles up carbon dioxide

September 21, 2018

A new type of battery developed by researchers at MIT could be made partly from carbon dioxide captured from power plants. Rather than attempting to convert carbon dioxide to specialized chemicals using metal catalysts, which ...

Scientists solve the golden puzzle of calaverite

September 21, 2018

Scientists from Russia and Germany have shed light on the crystalline structure of calaverite, foretelling the existence of a new gold compound previously unknown to chemists. The results of their study were published in ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.