Which mechanism causes increased dislocation mobility near boundaries grains in polycrystalline alloys?

💡 Explanation

Increased thermal vibration reduces the Peierls stress reduction near grain boundaries, because dislocation movement becomes thermally activated, therefore decreasing the energy needed to overcome lattice resistance and move dislocations rather than dislocation pinning that would increase force needed..

• Which outcome occurs when a core electron transitions between orbitals?
• Which consequence results when two unsynchronized lasers interfere?
• Within an integrated circuit, which risk increases when electron trench isolation degrades?
• Which outcome results when rapid decompression supersaturates a gas/liquid mixture?
• Which effect occurs when using a differential pressure flow meter in pulsating flow?
• Which outcome can initiate damage due to limitations of the Navier-Stokes equations under specific extreme turbulence scenarios?