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Issue J. Phys. IV France
Volume 07, Number C5, November 1997
IVth European Symposium on Martensitic Transformations
Page(s) C5-245 - C5-250
DOI http://dx.doi.org/10.1051/jp4:1997538

IVth European Symposium on Martensitic Transformations

J. Phys. IV France 07 (1997) C5-245-C5-250

DOI: 10.1051/jp4:1997538

Effect of L1o → Ni5Al3 Reordering on Properties of Martensitic Ni-Al Alloys

P.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


Abstract
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.



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