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A fundamental study of the χ-phase precipitation in CuAlNiTi(Mn) shape memory alloys

✍ Scribed by I. Hurtado; P. Ratchev; J. Van Humbeeck; L. Delaey

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
959 KB
Volume
44
Category
Article
ISSN
1359-6454

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✦ Synopsis

x-phase particles are precipitated when Ti is added as grain refiner to Cu-Al-Ni shape memory alloys. The size distribution of these precipitates is a function of the thermomechanical history of the alloy. The further addition of Mn to improve the alloy properties causes the appearance of a new set of small r-phase precipitates.

The conditions for their appearance are described together with a qualitative model which explains their stability. The presence of Mn is shown to play a central role in controlling the growth of the X-phase precipitates. Copyright

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Study by resonant ultrasound spectroscop
Study by resonant ultrasound spectroscopy of the elastic constants of the β phase in CuAlNi shape memory alloys
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The evolution with temperature of the elastic constants of the metastable ␤ phase in a Cu-27.96 at.%Al-3.62 at.% Ni shape memory alloy (SMA) has been studied by resonant ultrasound spectroscopy (RUS). The corresponding elastic constants of this cubic phase have been measured near the martensitic tra