2017 Volume 57 Issue 11 Pages 2065-2069
Accurate knowledge of dislocation reactions is crucial for understanding and controlling the macroscopic mechanical properties of α-iron and its alloys. A dislocation reaction: 1/2+1/2→ has never been observed. However, using in-situ transmission electron microscopy, we demonstrate that the two nanoscale 1/2<111> prismatic dislocation loops that undergo 1D glide motion approach and collide with each other to form a “high-energy” -dislocation junction. This anomalous reaction cannot be understood within the framework of the elasticity.