J. Phys. IV France
Volume 112, October 2003
Page(s) 593 - 596

J. Phys. IV France
112 (2003) 593
DOI: 10.1051/jp4:2003955

Acoustic recognition of stress induced martensitic transformations in Cu-based shape memory alloys

V. Novák1, M. Landa2 and P. Sittner1

1  Institute of Physics, AS CR, Na Slovance 2, 18221 Praha 8, Czech Republic
2  Institute of Thermomechanics, AS CR, Dolejskova 5, 18200 Praha 8, Czech Republic

Stress induced martensitic transformations in Cu-AI-Ni single crystal and Cu-AI-Zn-Mn polycrystal at room temperature were studied by an acoustic emission (AE) method. Based on the knowledge of AE signal level characteristics of individual transition processes obtained on single crystals, the AE data of Cu-Al-Zn-Mn polycrystal loaded in tension/compression are discussed. The AE method can be used for nondestructive in-situ recognition of the various transformation processes in thermomechanically loaded shape memory alloys.

© EDP Sciences 2003