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Effects of quenched‐in vacancies on the damping behaviour of Cu–11.9Al–2.5Mn shape memory alloy
Author(s) -
Wang Qingzhou,
Han Fusheng,
Wang Jinxiang,
Wang Qiang
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200406908
Subject(s) - materials science , alloy , shape memory alloy , quenching (fluorescence) , internal friction , diffusionless transformation , vacancy defect , condensed matter physics , phase (matter) , martensite , thermodynamics , metallurgy , microstructure , composite material , chemistry , physics , organic chemistry , fluorescence , quantum mechanics
By internal friction technique, the behaviour of quenched‐in vacancies and their influence on the martensitic transformation of the Cu–11.9Al–2.5Mn alloy has been studied. It is found that the reverse martensitic transformation temperature T p follows a non‐monotonous dependence on quenching temperature T p , of which the presence of a maximum T p value is attributed to the different vacancy formation energies in the ordered and disordered phases. The background internal friction decreases with increasing ageing time due to migration of vacancies and resultant pinning effect on the phase interfaces and dislocations. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)