A modified model for simulating the effect of temperature on ultrasonic attenuation in 7050 aluminum alloy

摘要: Knowing propagating properties of an ultrasonic wave can enhance the non-destructive testing techniques in alloy materials field, such as electromagnetic acoustic transducer techniques, and piezoelectric techniques. When temperature is taken into consideration, attenuation become very complex process. In this paper, a loss factor coefficient function with change temperatures established damping model term coupled equations elastic motion. A modified frequency domain for calculating due to changes 7050 Aluminum then developed. The validated experimentally using high power pulse transmitter/receiver RPR-4000, resistant set-up sample. simulation experimental results are determined be good agreement. numerical used calculate ultrasonic-waves attenuation, propagation directivity considering effect. modeling indicate that energy significantly affected by temperature. increases from 20°C up 480°C, attenuates 32.31%. It also found length near field increase There common basic mode waves, which attenuated cannot other factors. Increasing or frequency, obtain excellent directivity. Results obtained present will provide comprehensive understanding design parameter effects consequently improve design/performance