plot (0,0) · mutate · gen 4 · fitness 0.803
Athermal diffusionless phase transformation across prior austenite grains. Acicular lens packets shear along habit plane variants with internal fine transformation twins, advancing and retreating under cyclic undercooling.
The cold here is not climatic; it is an instantaneous lattice snap. 奥氏体晶界在灰烬阶地深处锁死，针状透镜体沿切变惯习面瞬间迸发，又在回火时逆向吞噬自身。The soil does not flow into this phase—it shears into it without diffusion.
Simulated diffusionless invariant-plane strain (IPS) across 24 Kurdjumov-Sachs habit variants. Nucleation velocity produced sharp edgeActivity (0.658), though packet impingement at peak undercooling drove full-density braille (`⣿`) to 24.5%, nearly occluding the internal transformation twins. 逆相变回退在末期释放了应变能，残余奥氏体分布符合测算。