Accession Number : ADA085518

Title :   Acoustic Emission Weld Monitor System. Data Acquisition and Investigation.

Descriptive Note : Final rept. Oct 78-Sep 79,

Corporate Author : GARD INC NILES ILL

Personal Author(s) : Groenwald,R. A. ; Mathieson,T. A. ; Kedzior,C. T.

Report Date : OCT 1979

Pagination or Media Count : 71

Abstract : The standard weld inspection techniques of radiography and ultrasonics have intrinsic disadvantages. The new technology of acoustic emission (AE) has shown an applicability to weld inspection which could overcome such disadvantages. This program is directed at utilizing acoustic-emission as a weld monitoring technique on a specific Army welding application. The reported work is phase 1 of an Army program to develop a microprocessor-based Acoustic Emission Weld Monitor (AEWM) for the purpose of in-process monitoring of armor plate welding. The intended use of this AEWM is to monitor the production welding performed in the fabrication of heavy armored vehicles. The objectives of this phase are to: (a) perform laboratory MIG welding of armor plate with controlled induction of critical flaws, (b) collect acoustic emission data generated during the welding, (c) perform a data analysis to correlate the recorded AE data with flaw presence, and (d) predict the accuracy with which AE is able to detect and locate the weld flaws as well as discriminate between flaw types.

Descriptors :   *PROCESSING, *WELDS, *ULTRASONICS, *ACOUSTIC EMISSIONS, DATA PROCESSING, MICROPROCESSORS, MONITORING, CRITICAL ASSEMBLIES, DEFECTS(MATERIALS), INSPECTION, ACOUSTIC DATA, RADIOGRAPHY, ARMORED VEHICLES, ULTRASONIC TESTS, WELDING, ARMOR PLATE.

Subject Categories : MFG & INDUSTRIAL ENG & CONTROL OF PRODUCT SYS
      ACOUSTIC DETECTION AND DETECTORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE

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