THE EFFECTS OF LAMELLAR STRUCTURE IN THE TIAL INTERMETALLIC COMPOUND ON ITS ACOUSTIC-EMISSION BEHAVIOR DURING TENSILE DEFORMATION

The dynamic behavior of TiAl intermetallic compounds during tensile de formation has been determined by the different appearance of the (alph a(2) + gamma) lamellar structure using the acoustic emission (AE) meth od. The AE events of these materials are obviously different. There is , however, no effectively direct evidence to prove the relationship be tween the microstructure of these TiAl alloys and the AE behavior. In this paper, the effect of the interfaces on the transmitted wave are c alculated quantitatively. According to these results. the effects of t he microstructure of TiAl alloys on the AE behavior have been clarifie d. Copyright (C) 1996 Elsevier Science Ltd