발간논문

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Vol.32, No.7, 779 ~ 786, 1994
Title
Shape Memory Characteristics Associated with the B2＝B19 Transformation in a Ti - 35Ni - 15Cu ( at% ) Alloy
남태현Tae Hyun Nam, 허경철Gyeong Cheul Hur, 홍석균Suk Kyun Hong, 천병선Byong 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.
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