This study investigates the strength of materials at extreme strain rates, exceeding 10⁶ s⁻¹. Using microballistic impact testing, the researchers demonstrate that the strength of copper, titanium, and gold increases with temperature, a counterintuitive finding as most materials soften when heated. This anomalous thermal strengthening is attributed to a shift in the controlling deformation mechanism from thermally activated strengthening to ballistic transport of dislocations.
Publisher
Nature
Published On
Jun 06, 2024
Authors
Ian Dowding, Christopher A. Schuh
Tags
strength of materials
extreme strain rates
thermal strengthening
ballistic impact
dislocations
copper
titanium
gold
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