ASTM C1331-01 - 10.5.2001
 
1. Scope

1.1 This test method describes a procedure for measurement of ultrasonic velocity in structural engineering solids such as monolithic ceramics, toughened ceramics, and ceramic matrix composites.

1.2 This test method is based on the broadband pulse-echo contact ultrasonic method. The procedure involves a computer-implemented, frequency-domain method for precise measurement of time delays between pairs of echoes returned by the back surface of a test sample or part.

1.3 This test method describes a procedure for using a digital cross-correlation algorithm for velocity measurement. The cross-correlation function yields a time delay between any two echo waveforms (1).

 
2. Referenced Documents

MIL-STD-410

Nondestructive Testing Personnel Qualification and Certification Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.

B311-22(2026)

Standard Test Method for Density of Powder Metallurgy (PM) Materials Containing Less Than Two Percent Porosity

C373-18(2023)

Standard Test Methods for Determination of Water Absorption and Associated Properties by Vacuum Method for Pressed Ceramic Tiles and Glass Tiles and Boil Method for Extruded Ceramic Tiles and Non-tile Fired Ceramic Whiteware Products

E494-20(2025)

Standard Practice for Measuring Ultrasonic Velocity in Materials by Comparative Pulse-Echo Method

Recommended Practice SNT-TC-1A

for Nondestructive Testing Personnel Qualification and Certification Available from American Society for Nondestructive Testing (ASNT), P.O. Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.

E1316-26c

Standard Terminology for Nondestructive Examinations (Includes all amendments and changes 9/22/2026).