REVIEW OF NONDESTRUCTIVE TESTING TECHNIQUES FOR DETECTING LACK OF PENETRATION IN ALUMINUM FUSION WELDS

A LITERATURE SEARCH WAS MADE TO DETERMINE THE EFFECTIVENESS OF VARIOUS NONDESTRUCTIVE TESTING TECHNIQUES FOR DETECTING LACK OF PENETRATION, I.E., INCOMPLETE PENETRATION, IN BUTT JOINTS IN ALUMINUM ALLOYS FUSION WELDED FROM BOTH SIDES. UNDER CERTAIN CONDITIONS, CONVENTIONAL ULTRASONIC AND RADIOGRAPHIC TECHNIQUES MAY FAIL TO DETECT SUCH INCOMPLETE PENETRATION. TWO APPROACHES TO RADIOGRAPHIC INSPECTION ALSO ARE REVIEWED WHICH MIGHT BE DEVELOPED INTO SATISFACTORY INSPECTION TECHNIQUES FOR IMPROVED RELIABILITY IN DETECTION OF INCOMPLETE JOINT PENETRATION. ONE APPROACH INVOLVES THE MEASUREMENT OF RADIOGRAPHIC DENSITY VARIATIONS IN WELD AREAS. THE OTHER APPROACH INVOLVES CREATING A READILY DETECTABLE FLAW WHICH IS COMPLETELY REMOVED WHEN JOINT PENETRATION IS COMPLETE. IN ADDITION, TWO APPROACHES TO IMPROVE ULTRASONIC INSPECTION ARE REVIEWED. ONE APPROACH IS TO INCREASE THE SENSITIVITY OF THE TEST METHOD BY INCREASING THE TEST FREQUENCY. THE OTHER APPROACH INVOLVES CREATING A READILY DETECTABLE FLAW WHICH IS COMPLETELY REMOVED WHEN COMPLETE PENETRATION IS OBTAINED, SIMILAR TO THAT PROPOSED FOR RADIOGRAPHIC INSPECTION. RECOMMENDATIONS ARE MADE FOR FUTURE RESEARCH TO DEVELOP THE POTENTIAL OF THESE APPROACHES. /AUTHOR/

• Supplemental Notes:
  • Rsic-701, pP 1-18, 1 FIG, 16 REF
• Corporate Authors:

  Redstone Scientific Information Center

  ,    
• Authors:
  • Gibson, J A
• Publication Date: 1967-10

Subject/Index Terms

• TRT Terms: Aluminum alloys; Butt joints; Fusion; Inspection; Joints; Nondestructive tests; Pendulum tests; Radioactivity; Radiography; Reviews; Test procedures; Ultrasonic tests; Welding
• Uncontrolled Terms: Fusion welding
• Old TRIS Terms: Joint
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216371
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 18 1994 12:00AM