Experimental simulation and dynamic behavior of the AE due to martensitic transformation using shear wave transmission sensor

We conducted the waveform analysis of acoustic emission (AE) signals to study the dynamic behavior of materials deformed or transformed; namely, two types of martensitic transformation in Cu-Ni-Al shape-memory-alloy (SMA) single crystals during tensile deformation that produce different martensitic structures. The AE source behavior is expected to be of shear. We simulated AE signals due to martensitic transformation using a shear-wave transducer as the artificial source. Results of AE waveform analysis in Cu-Al-Ni SMA single crystals are compared with the simulation results. The martensite with a simpler stacking structure exhibits faster transformation behavior. Keywords: Shear AE wave source, martensitic transformation, source rise time