MANUFACTURE OF NI-TI TYPE SHAPE MEMORY MATERIAL

摘要

PURPOSE:To obtain an Ni-Ti type shape memory material which can repeatedly function between the matrix phase and an R phase in a wide temp. range by cold working an Ni-Ti alloy causing thermoelastic martensitic transformation and by heat treating it at a specified temp. CONSTITUTION:An Ni-Ti alloy causing thermoelastic martensitic transformation is cold worked to the desired size of a shape memory material. By the final cold working, high density dislocation is introduced. The alloy is then heat treated at 350-450 deg.C for 0.5-2hr to rearrange the incomplete dislocation.