上游气通大粤 SHANGHAI JIAO TONG UNIVERSITY Shear/Displacive Transformation: In this transformation,atoms change position(lattice reconstruction)in an ordered military manner,by a shear mechanism. Military: The regimented/coordinated manner in which atoms change position In contrast to diffusion-controlled transformations which are termed civilian Two types of shear transformations: Diffusionless:individual atomic movements less than one interatomic spacing >Martensite transformation Diffusional:Bainite transformation (Fe:shear;C:diffuse) K.Chen 4K. Chen Shear/Displacive Transformation:  In this transformation, atoms change position (lattice reconstruction) in an ordered military manner, by a shear mechanism. Military:  The regimented/coordinated manner in which atoms change position  In contrast to diffusion-controlled transformations which are termed civilian Two types of shear transformations:  Diffusionless: individual atomic movements less than one interatomic spacing  Martensite transformation  Diffusional: Bainite transformation (Fe: shear; C: diffuse) 4