J. Phys. IV France 07 (1997) C5-245-C5-250
Effect of L1o → Ni5Al3 Reordering on Properties of Martensitic Ni-Al AlloysP.L. Potapov1, S.Y. Song2, V.A. Udovenko1 and K.K. Jee3
1 Institute of Physical Metallurgy, 2nd Baumanskaya 9/23, 107005 Moscow, Russia
2 Moscow Steel and Alloys Institute, Leninsky Pr. 4, 117936 Moscow, Russia
3 Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul, Korea
L1o → Ni5Al3 reordering and related properties in powder Ni-Al alloys consisting 64-65 at.%Ni have been examined by X-ray diffraction and dilatometric and damping capacity measurements. The Ni5Al3 formation occurs in the L1o matrix by simple reordering of atoms with a continuous increase of the c/a ratio. As a result, degradation of shape memory effect and decrease of damping capacity are observed after short-time annealing at 200-300°C.
© EDP Sciences 1997