A Remote Laser System for Material Characterization
نویسنده
چکیده
For many years, new techniques have been developed to overcome the problems involved with the generation and detection of ultrasound in materials at high temperature [1,2]. A non-contacting technique is described using lasers to generate and detect ultrasound and which can be used to study the variation in acoustic velocity as a function of temperature. Results are presented for the change in longitudinal velocity (v£) with increasing temperature in five polycrystalline materials, namely Dural, aluminum, AISI-3l0 stainless steel, iron and graphite.
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