|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Grain Size Characterization in Austenitic Stainless Steel Using Parameterized Ultrasonic Gaussian Echo Model
||Song Peng, Qi Ouyang, Zizong Zhu, Tao Liu
|On-Site Speaker (Planned)
To nondestructively characterize the grain size of austenitic stainless steel, the electromagnetic acoustic transducer (EMAT) is exposed a non-contact technology to measure crystallographic texture by ultrasonic parameters. In this paper, ultrasonic attenuation coefficients are measured on ASTM type 304 stainless steel specimens suffering different heat treatment. A parameterized Gaussian echo model is used to revise ultrasonic echo signal affected by noise, and a comparison between the attenuation coefficient calculated by Gaussian echo model and traditional maximum amplitude method is made. Experiment results show that changes in average grain size in specimens affect attenuation coefficients, and the parameterized ultrasonic Gaussian echo model can improve the accuracy of the grain size prediction.
||Planned: None Selected