Shock loading effect on the MHz-range amplitude-independent internal friction and elastic properties of the beta sub 1 ' martensite phase in Cu-Al-Ni alloys

The internal friction spectrum at 5 MHz in the martensite beta sub 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 pea...

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Bibliographic Details
Published in:Physica status solidi. A, Applied research Applied research, 2002-05, Vol.191 (1), p.33-41
Main Authors: Kobelev, N P, Soifer, Y M, Golyandin, S N, Kustov, S B, Nikanorov, S P, Batist, R D, Van Humbeeck, J
Format: Article
Language:English
Online Access:Get full text
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Summary:The internal friction spectrum at 5 MHz in the martensite beta sub 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 gamma -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.
ISSN:0031-8965