Effects of off-specification procedures on the mechanical properties of half-bead weld repairs

Technical Report · Fri Jul 01 04:00:00 EDT 1983

OSTI ID:5768049

Hobson, D O; Nanstad, R K

We examined the effects of off-specification procedures on the mechanical properties of half-bead weld repairs. The name half-bead is derived from the specification that half the thickness of the initial weld layer be ground off before the second layer is deposited. In this study the heat-affected zones of a weldment made with both all and none of the first layer removed were tested for toughness, hardness, and microstructural differences, and the results were compared with the properties of a protypical half-bead repair made under ASME Boiler and Pressure Vessel Code, Sect. XI, guidelines. The results of this limited study showed no apparent justification for the requirement to grind off half the first layer in this type of weld repair. The graded electrode sizes used to make the welds probably had more to do with the weld properties than did the range of first-layer thicknesses used in this study.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5768049
• Report Number(s): NUREG/CR-3265; ORNL/TM-8661; ON: DE83015002
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420100* -- Engineering-- General Engineering-- (-1987)
CHARPY TEST
CRYSTAL STRUCTURE
DESTRUCTIVE TESTING
FRACTURE PROPERTIES
HARDNESS
IMPACT TESTS
JOINTS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MICROSTRUCTURE
SPECIFICATIONS
TESTING
WELDED JOINTS