Ni2Al Versus Ni5Al3 Ordering in Ni65Al35 Austenite and Martensite
EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
2 MFKI, P.O. Box 76, 1325 Budapest, Hungary
3 MTM, K.U.L., de Croylaan 2, 3001 Herverlee, Belgium
4 Fac. Werktuigbouwkunde, Univ. Twente, P.B. 217, 7500 AE Enschede, The Netherlands
The formation of the Ni5Al3 phase in L10 martensite of Ni65Al35 material can be delayed by using slow quenching rates after the homogenisation of the material. This is of potential interest for the use of Ni-Al as a high temperature shape memory alloy. Based on the present results indicating a strong influence of the quenching rate on the ordering sequence in this material, some difficulties in previous interpretations can be clarified.
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