摘要
根据马氏体相变的特征:代位原子无扩散切变,以不变平面应变进行形状改变,以及按群论应用于马氏体相变的表述式,导出材料具有形状记忆效应的条件,即只要形成单变体或接近单变体马氏体,防止阻碍形状记忆效应因素如位错的形成和材料通过马氏体相变及其逆相变就能显示形状记忆效应。
From the characteristics of martensitic transformation that there exists the diffusionless shear of the substitutional atoms and the shape change is associated with an invariant plane distortion, and the group theory expression applied to the martensitic transformation, the regnirements of the shape memory effects (SEM) in materials are derived, i.c., SME can be attained in materials through martensitic transformation and its reverse transformation only when there forms single variant, or nearly single variant of martensite and the occurence of factors resisting SME are prevented. Accordingly, variance shape memory materials are expected to be further developed.
出处
《功能材料》
EI
CAS
CSCD
1993年第1期1-3,共3页
Journal of Functional Materials
关键词
形状记忆材料
形状记忆效应
shape memory materials
shape memory effect
