前言 形状记忆合金在实际使用中并不希望发生塑性变形。但是另一方面,在半成品的加工成型过程、双向效应的训练过程中却需要变形;此外,塑性变形还能影响热滞后和机械滞后迥线。 b.c.c.有序高温β相塑性变形时a/2<111>位错的运动与反相畴界的形成相联系,或者通过超位错如a/2<111>位错对或a<100>位错的运动来实现。在多晶体材料中晶粒边界和反相畴界对变形过程起作用。CuZnAl-β相合金表现出相当大的晶间断裂脆性。通过 Preface Shape memory alloys are not expected to deform plastically in practice. However, on the other hand, the process of semi-finished products forming process, two-way effect of training needs deformation; In addition, plastic deformation can also affect the thermal hysteresis and mechanical hysteresis line. The movement of the a / 2 <111> dislocation at bcc ordered β-phase plastic deformation is associated with the formation of inverse domain boundaries or by super-dislocations such as a / 2 <111> dislocation pairs or a <100> Wrong movement to achieve. In polycrystalline materials, grain boundaries and anti-phase boundaries play a role in the deformation process. CuZnAl-β phase alloy shows considerable intergranular fracture brittleness. by