Shock Loading Effect on the MHz-Range Amplitude-Independent Internal Friction and Elastic Properties of the ??1 Martensite Phase in Cu-Al-Ni Alloys

Autor:	N. P. Kobelev, S. P. Nikanorov, S. Golyandin, Ya. M. Soifer, R. De Batist, J. Van Humbeeck, Sergey Kustov
Rok vydání:	2002
Předmět:	Amplitude Materials science Condensed matter physics Lattice (order) Martensite Metallurgy Impact loading Grain boundary Dislocation Condensed Matter Physics Sound wave Internal friction Electronic Optical and Magnetic Materials
Zdroj:	physica status solidi (a). 191:33-41
ISSN:	1521-396X 0031-8965
DOI:	10.1002/1521-396x(200205)191:1<33::aid-pssa33>3.0.co;2-f
Popis:	The internal friction spectrum at 5 MHz in the martensite β' 1 -phase of CuAlNi alloys shows two prominent internal friction peaks at 270 and 170 K. Corresponding anomalies in the sound wave velocity-temperature dependence have been observed. Detailed analysis of the behaviour of the peaks in dependence on different levels of impact loading and γ-irradiation points to dislocation-point defect interaction. It is assumed that grain boundary dislocations are responsible for the 270 K peak while lattice dislocation, existing within the martensite variants are responsible for the 170 K peak.
Databáze:	OpenAIRE
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