Accession Number : AD0751529

Title :   Corrosion Cracking of Metallic Materials. Part II. Acoustic Emission - Experiment and Theory.

Descriptive Note : Final technical rept. 15 Dec 68-31 Oct 71,

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF METALLURGICAL ENGINEERING

Personal Author(s) : Fontana,Mars G. ; Graff,Karl F.

Report Date : AUG 1972

Pagination or Media Count : 72

Abstract : The aspects of acoustic emission associated with the theory of the stress waves emitted from cracking and the experimental measurement of the acoustic emission pulses is reported. In the theoretical phase of the work, a survey of the applicable literature in the area of stress waves from moving cracks is reviewed. Certain simple theoretical arguments pertaining to the energy release from an increment of crack growth are reported. In the experimental phase, an evaluation of a number of ultrasonic nondestructive test transducers for acoustic emission work was carried out and an optimum transducer selected. A complete acoustic emission test system was then constructed and several tests performed by the conclusion of the project. (Author)

Descriptors :   (*STRESS CORROSION, ULTRASONIC RADIATION), (*NONDESTRUCTIVE TESTING, ULTRASONIC RADIATION), MECHANICAL WAVES, STRESSES, INSTRUMENTATION, TRANSDUCERS, FRACTURE(MECHANICS), MEASUREMENT, CRACKS

Subject Categories : Properties of Metals and Alloys
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE