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DESTRUCTIVE TESTING

DESTRUCTIVE TESTING

Destructive tests on raw materials, welded joints are usually made as part of the approval of material/ welding procedure or a welder.

Commonly used destructive tests are:
  • Hardness 
  • Bend 
  • Tensile
  • Charpy
  • Fracture tests
  • Macro section

TYPES OF TEST

Quantitative (For measuring a 'quantity') 
  • Tensile
  • Charpy
  • Hardness
  • C.T.O.T. (crack tip opening test)
Qualitative (For assessing joint 'quality')
  • Bend test
  • Nick break 
  • Macro
  • Fillet fracture
The test pieces are cut from the test weld and their location is often specified in the standard. The
areas for test are shown below.
DESTRUCTIVE TESTING

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FILLET WELD FRACTURE TEST

FILLET WELD FRACTURE TEST Object :  To break the joint through the weld to permit examination of the fracture surfaces for flaws and to check root penetration and fusion. Method: The specimen is cut to length and a saw cut, normally 2 mm deep, is made along the center of the weld face. The specimen is fractured by bending or hammer blows. Reporting Results: Thickness of parent material.  Throat thickness and leg length.  Location of fracture. Appearance of joint after fracture. Depth of penetration / lack of penetration or fusion.
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