Classification 上游充通大兽 SHANGHAI JIAO TONG UNIVERSITY Diffusional transformations can be divided into: ■Precipitation reactions(脱溶沉淀) ■ Eutectoid transformations(共析转变) Ordering reactions(有序化转变) ■ Massive transformations(块状相变) ■ Polymorphic changes(同素异构转变（多形性转变）》 AJ JIAO TONG UNIV K.Chen 13K. Chen Diffusional transformations can be divided into:  Precipitation reactions (脱溶沉淀)  Eutectoid transformations (共析转变)  Ordering reactions (有序化转变)  Massive transformations (块状相变)  Polymorphic changes (同素异构转变(多形性转变)) Classification 13