𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Vibrational behavior of the β phase near martensitic transformation in Cu–Al–Ni shape memory alloys

✍ Scribed by J.I. Pérez-Landazábal; V. Recarte; J.M. Ezpeleta; P.P. Rodrı́guez; J. San Juan; M.L. Nó

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
111 KB
Volume
378
Category
Article
ISSN
0921-5093

No coin nor oath required. For personal study only.

✦ Synopsis

The vibrational behavior of the metastable ␤ phase near the martensitic transformation (MT) in a single-crystalline Cu-27.96 at.% Al-3.62 at.% Ni shape memory alloy (SMA) has been studied by resonant ultrasonic spectroscopy (RUS). This technique allows to determine simultaneously all the elastic constants C ij of anisotropic materials and also the internal friction Q -1 (C ij ) associated to some particular elastic constant C ij . The evolution of the resonance frequencies with temperature has been studied and shows that the C and C 44 elastic constants are the magnitudes which control the vibrational response of the ␤ phase near the martensitic transformation. The internal friction value Q -1 associated to different resonance modes and their evolution has been measured and correlated to the elastic behavior of the alloy.

📜 SIMILAR VOLUMES

Influence of Ni on martensitic phase tra
Influence of Ni on martensitic phase transformations in NiTi shape memory alloys
✍ J. Frenzel; E.P. George; A. Dlouhy; Ch. Somsen; M.F.-X. Wagner; G. Eggeler 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 993 KB

High-precision data on phase transformation temperatures in NiTi, including numerical expressions for the effect of Ni on M S , M F , A S , A F and T 0 , are obtained, and the reasons for the large experimental scatter observed in previous studies are discussed. Clear experimental evidence is provid

Influence of iridium on the martensitic
Influence of iridium on the martensitic transformation in Ni–Ti shape memory alloys
✍ Ch Somsen; J Khalil-Allafi; E.P George 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 433 KB

In the binary system Ni-Ir it is known that Ni and Ir form a complete solid solution over the entire composition range. Starting from this, Ni 48.5-x Ti 51.5 Ir x alloys with x = 0, 2.5, 5 and 10 at.% and a Ni 49.5 Ti 48 Ir 2.5 alloy have been prepared by arc melting in an argon atmosphere in order

Study of the stability and decomposition
Study of the stability and decomposition process of the β phase in Cu–Al–Ni shape memory alloys
✍ J.I. Pérez-Landazábal; V. Recarte; V. Sánchez-Alarcos; M.L. Nó; J. San Juan 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 340 KB

The influence of precipitation processes on the characteristics of the martensitic transformation in two Cu-Al-Ni shape memory alloys processed by powder metallurgy has been analyzed. The Cu-14.37Al-4.2Ni (wt.%) alloy with a hypereutectoid composition undergoes a lowtemperature martensitic transform