| Title |
Shape Memory Characteristics Associated with the B2＝B19 Transformation in a Ti - 35Ni - 15Cu ( at% ) Alloy |
| Authors |
남태현(Tae Hyun Nam); 허경철(Gyeong Cheul Hur); 홍석균(Suk Kyun Hong); 천병선(Byong Sun Chun) |
| Abstract |
Shape Memory Characteristics associated with the B2⇔B19 transformation in a Ti-35Ni-15Cu(at%) alloy have been investigated by means of thermal cycling test under constant load and optical microscopy. The B2→B19 transformation start temperature under load, M´_s(ℓ) increased linearly with increasing applied stress up to about 100MPa, above which a deviation from the linearity occured. Considerably large residual elongation started to occur at about 100MPa and thus, the maximum recoverable transformation elongation associated with the B2→B19 transformation was found to be 2.9%. Preferentially oriented martensite variants in relation to the applied stress was more stable on heating than the variants which formed a triangular shape. |