Numéro |
J. Phys. IV France
Volume 112, October 2003
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Page(s) | 553 - 556 | |
DOI | https://doi.org/10.1051/jp4:2003946 |
J. Phys. IV France 112 (2003) 553
DOI: 10.1051/jp4:2003946
A modified Cu-Al-Nb shape memory alloy obtained by melt-spinning
R.M. Gomes1, R.E. Coelho1, C.J. de Araujo2, A.G. de Souza3, T.A.A. Melo1 and S.J.G. de Lima11 Universidade Federal da Paraiba, Centro de Tecnologia, Departamento de Tecnologia Mecânica, Laboratorio de Solidificaçao Rapida, Joao Pessoa-PB, CEP 58059-900, Brazil
2 Universidade Federal da Paraiba, Departamento de Engenharia Mecânica, Campus II, Caixa Postal 10069, Campina Grande-PB, CEP 58109-970, Brazil
3 Universidade Federal da Paraiba, Centro de Ciências Exatas e da Natureza, Departamento de Quimica, Laboratorio de Termoquimica e Materiais, Joao Pessoa-PB, CEP 58059-900, Brazil
Abstract
Nb modified Cu-Al-Ni shape memory alloys with different Ni contents (1.0, 2.0 and 3.0wt%) were processed using the melt spinning
technique. The microstructures and the characteristic transformation temperatures were detennilled by x-ray diffraction and
thennal analysis (differential scanning calorimeter and thennomechanical analysis) respectively. It was observed that all
as-melt spun ribbon microstructures present the
phase and some peaks that are thought to be from the 18R type martensite. After water quenching the microstuctures of the
ribbons are fully 18R and 2H type martensites. The typical Ms, Mf, As and Af temperatures are shifted to lower values with
increasing the Ni concentration.
© EDP Sciences 2003