Constrained Phase Transformation of Prestrained TiNi Shape-Memory Alloy in Cement Composite

摘要

The martensitic transformation behaviors of prestrained TiNi SMA fiber in cement composite were investigated by using differential scanning calorimeter (DSC). The results showed that the whole constrained transformation temperature span is expanded which may be attributed to the martensite re-deformation induced by the recovery stress. Thus above the apparent transformation finish temperature shown in the DSC heating curve of the composite sample, the reverse transformation continues to some extent.