Paper Title:
Shape Memory NiTi Alloys Obtained by Powder Metallurgy Route
  Abstract

The effect of Fe, respective Cu, additions as substitute for Ni in NiTi shape memory alloys (SMAs) on the delaying of its phase transition and narrowing hysteresis are well known, NiTi-Fe and NiTi-Cu SMAs having applications especially to the actuators that require such properties. These SMAs are currently produced by conventional melting methods, which are energo-intensive and impose very severe processing conditions to avoid contamination. The results of researches presented in this paper prove the possibility of these SMAs obtaining by powder metallurgy via reactive sintering – more advantageous from both technical and economic point of view. A beneficial effect on both sintering and homogeneity of the obtained SMAs proved to have a controlled mechanical alloying applied to powder mixture before compacting and sintering.

  Info
Periodical
Edited by
Ionel Chicinaş and Liviu Brânduşan
Pages
99-104
DOI
10.4028/www.scientific.net/MSF.672.99
Citation
M. Lucaci, M. Valeanu, R. L. Orban, V. Tsakiris, D. C. Cirstea, L. Leonat, "Shape Memory NiTi Alloys Obtained by Powder Metallurgy Route", Materials Science Forum, Vol. 672, pp. 99-104, 2011
Online since
January 2011
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