Publicado

2011-07-01

MEASUREMENT OF ELASTIC PROPERTIES OF MATERIALS BY THE ULTRASONIC THROUGH-TRANSMISSION TECHNIQUE

Palabras clave:


ultrasound, nanoindentation, elastic properties (es)

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Autores/as

  • EDIGUER E. FRANCO Universidad Autónoma de Occidente, Cali, Valle, Colombia, Departamento de Energética y Mecánica
  • JUAN M. MEZA Escuela de Ingeniería de Materiales Universidad Nacional de Colombia, Medellín, Colombia.
  • FLÁVIO BUIOCHI Departamento de Engenharia Mecatrônica e de Sistemas Mecânicos, Escola Politécnica da Universidade de São Paulo, - SP, Brasil.
The elastic mechanical behavior of elastic materials is modeled by a pair of independent constants (Young’s modulus and Poisson’s coefficient). A precise measurement for both constants is necessary in some applications, such as the quality control of mechanical elements and standard materials used for the calibration of some equipment. Ultrasonic techniques have been used because wave velocity depends on the elastic properties of the propagation medium. The ultrasonic test shows better repeatability and accuracy than the tensile and indentation test. In this work, the theoretical and experimental aspects related to the ultrasonic through-transmission technique for the characterization of elastic solids is presented. Furthermore, an amorphous material and some polycrystalline materials were tested. Results have shown an excellent repeatability and numerical errors that are less than 3% in high-purity samples.

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