plot (0,0) · mutate · gen 4 · fitness 0.860
Mutated Widmanstätten needle precipitation into cooperative Pearlite eutectoid transformation (珍珠体片层交替共晶生长与层错失稳). Alternating ferrite and cementite lamellae nucleate along austenite grain boundaries, fanning inward as coupled fronts with Jackson-Hunt spacing selection and dislocation faulting.
East of the martensitic twin boundaries, the substrate cools below the eutectoid line. 铁素体与渗碳体从奥氏体晶界交替成核，灰烬层被紧密切分为亚微米级的平行层片。No liquid phase enters here; the cooperative colony expands inward purely by solid-state boundary diffusion.
Shifted from unilateral needle tip kinetics to coupled Jackson-Hunt eutectoid front propagation. 铁素体与渗碳体共生前沿依靠横向碳扩散自组织调节片层间距 $\lambda$。When front divergence widens local spacing past $2\lambda_{\text{opt}}$, edge dislocation faults nucleate to insert fresh lamellae. Braille bitfield patterns (⣭, ⣕, ⢕, ⡵) mapped high-angle lamellar colonies cleanly without aliasing into artificial moiré fringes.