Steel is a common benchmark material for strength. Many newly developed materials boast strength rivaling that of steel. Although strong, steel has weaknesses, in particular, it is susceptible to fatigue failure. Instead of pushing steel aside for a newer model, researchers have identified a way to improve steel’s performance by adding a bit of new to the old.
The team, which included scientists from the Massachusetts Institute of Technology (MIT), Kyushu Univ. in Japan, and the Max-Planck-Institut für Eisenforschung, has come up with a way to address steel’s weakness. When steel is exposed to repeated loads, small cracks can form. For example, a reaction vessel may undergo repeated temperature changes that cause the reactor to expand and contract. The force...
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