抄録
Offer Organization: Japan Society for the Promotion of Science, System Name: Grants-in-Aid for Scientific Research, Category: Grant-in-Aid for Scientific Research (B), Fund Type: -, Overall Grant Amount: - (direct: 12400000, indirect: 3720000)
Effects of the magnitude of incompatibility at domain-walls in martensite microstructure of Ti-Ni based shape memory alloys were investigated in this study.Numerical analysis on the incompatibility of domain-walls showed that the incompatibility can be vanished or very small at certain kinds of domain-boundary in Ti-Ni based alloys with B2-B19 or B2-B19' martensitic transformation. One of the alloys which satisfies the condition for the very small incompatibility exhibited no shift in transformation temperature upon thermal cycling more than 200 cycles. This result implies that the super-long life shape memory alloy can be developed in Ti-Ni based alloys.