In-situ observation of fatigue crack growth for $${\langle001\rangle}$$-oriented rhombohedral Pb(Mg1/3 Nb2/3)O3–PbTiO3 ferroelectric single crystal
by Fang, F.; Yang, W.; Zhang, F. C.; Qing, H.
In-situ observation of the electrically induced fatigue crack growth is carried out for $${\langle001\rangle}$$-oriented (Pb(Mg1/3Nb2/3)O3)0.72–(PbTiO3)0.28 (PMN-28PT) ferroelectric single crystals under alternating electric field. It is found that apparent crack growth takes place even though the peak value of the applied electric field is below E
c. The crack propagation is a repeated process of advancement in small increments, followed by a sudden increase in the crack length. When the crack tip pops-in, there is a tendency for branching. The test data suggest that the variation of the crack boundary condition may contribute to the observed electrically induced crack growth behavior.
DOI: 10.1007/s10704-008-9248-9
Online Date: 8/12/2008
Print publication date: 6/1/2008
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