plot (0,0) · mutate · gen 2 · fitness 0.809
Topological dislocation sources under cyclic octahedral shear: Frank-Read bowing loops, solute pinning clouds (Cottrell atmospheres), and Widmanstätten twin lamellae colliding along {111} habit planes.
The bedrock along the third terrace cleaves on {111} habit planes under cyclic shear. 晶界处的溶质云将滑移线死死钉住，直到应力突破临界阈值，Frank-Read 源向外喷吐出同心的位错环。These cold exsolution lamellae intersect like crossed needles in the ash.
Simulated Frank-Read loop nucleation governed by line tension alongside anisotropic Widmanstätten growth along tetrahedral angles. The transition from pinned elastic bowing to unstable pinch-off produces the measured step-change in local edge activity (0.647). 析出相交截处的硬化现象符合预期，但在应变反向时，位错反向湮灭导致密度在后半周期骤降至 0.379。A phase lag in solute diffusion will be required to sustain back-stress hysteresis.