U.S. Navy nuclear submarines get protection from weld cracking with neutron beams 9 January 2026

An artistic rendering of the pressure hulls of U.S. Navy nuclear submarines, consisting of many steel plates joined by precision manual or robotic welding methods.Image courtesy of Oak Ridge National Laboratory, U.S. Dept. of Energy.

Scientists have turned to neutron beams to help protect the U.S. Navy’s nuclear-powered submarines so they can endure some of the most extreme pressure and temperature conditions on Earth. Researchers have found that neutron scattering techniques, unlike X-rays, can penetrate deeply into thick metals without damaging them.

PhD student and researcher Caruso states that “the goal is to have a model that accurately predicts when welding conditions can cause cracking and understand how to avoid or minimize those conditions.”

Learn more on Interesting Engineering.

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