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Ni-Al 계 마르텐사이트 합금에서 Llo → Ni5Al3 변태
지광구(K. K. Jee),송시연(S. Y. Song),장우양(W. Y. Jang) 한국열처리공학회 2002 熱處理工學會誌 Vol.15 No.2
N/A LI_0 → Ni_5Al_3 reordering and related properties in Ni-Al alloys consisting of 64-65at%Ni are characterized by X-ray diffraction, shape memory effect and damping capacity. Formation of Ni_5Al_3 takes place by simple ordering of atoms with a continuous increase in c/a ratio. As a result, degradation of shape memory effect and damping capacity is observed after short time annealing at 200-300℃.
신명철,지광구,P.L.포타포프,송시연 대한금속재료학회(대한금속학회) 1994 대한금속·재료학회지 Vol.32 No.9
Energetistic consideration of shape memory alloys(SMAs) is carried out in this work. ΔW_(cri), a criterion of energy, is developed to characterize and evaluate intrinsic property of a SMA. Through an experiment with Mn-Cu SMA, ΔW_(cir) is measured for a spiral and a spring and their efficiency is discussed by calculating their geometry factors.