Which mechanism amplifies dislocation movement within a crystal structure?

💡 Explanation

The Frank-Read source creates new dislocations with existing ones because applied stress bows out a dislocation pinned at two points to nucleate more dislocation loops; therefore plasticity increases, rather than effects caused by grain boundaries.

• Which mechanism causes zero electrical resistance in superconducting quantum interference devices (SQUIDs)?
• Which limitation arises when fuel rods degrade during fission?
• Which consequence results when analyzing birefringent minerals inside polarizing microscopes?
• Which risk increases when the Arrhenius equation predicts exceedingly high reaction rates at extremely elevated temperatures within a chemical reactor?
• Which mechanism causes increased current flow when a superconducting nanowire cools?
• Which effect limits micromachining resolution using excimer lasers?