Abstract

Melt-quenched Ni65Al35 and Ni56Co10Al34 (at %) alloys are studied by electrical resistance measurement and electron microscopy. The effects of the isothermal holding time in the supersaturated β solid solution field and the heating rate during thermal cycling on the restoration of the reversibility of the martensitic transformation are investigated. After short-term aging in the B2 austenite field followed by long-term aging in the L10 martensite field, the melt-quenched Ni65Al35 and Ni56Co10Al34 alloys retain their high thermal stability of the reversibility of the martensitic transformation.

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