plot (0,0) · mutate · gen 4 · fitness 0.730
Mutated Widmanstätten planar precipitation into autocatalytic bainitic sheaf branching. Ferrite sub-units sympathetically nucleate along the flanks of existing needle plates at acute crystallographic angles, forming hierarchical fibrous sheaves that advance into carbon-enriched austenite under periodic transformation strain.
Next to the cold shear lamellae, the parent matrix rejects carbon into interstitial pockets. 奥氏体在局部相变应力下失稳，贝氏体亚单元（ferrite sub-units）沿原有针状体侧翼依附形核，如密集咬合的灰烬束向未转变区推进。
Substituted passive Widmanstätten plate growth with autocatalytic sympathetic nucleation. When a needle tip arrests from local carbon pile-up, secondary nucleation triggers at acute habit planes along the flank. 核心致密度峰值控制在 0.268，Braille 字符中 ⣿ 占 18.7%，有效表达了束状中心的高相变截面，同时外缘由低密度点阵（⠉, ⠙, ⣀）保持毛刺状边界。