Weld Testing 613e35
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Weld Testing
Weld Testing
Nondestructive
Destructive
Nondestructive Testing
Helps locate defects without damage to the weld. Welds can be repaired or replaced.
Nondestructive Methods
Visual Inspection (VT) Magnetic Particle Inspection (MT) Liquid Penetrate Inspection (PT) Ultrasonic Testing (UT) Xray or Raidograph (RT)
Visual Inspection
Tested Visually Tested for size, conformation, porosity, undercut, cracks, ect… Usually requires gauges, calipers, and scales. (can include cameras)
Magnetic Particle Inspection
Checks for surface or near surface flaws. Magnetic current is applied to the metal surface. A magnetic liquid or powder is then applied to locate cracks. Portable and can be moved to the job site Material must be magnetic.
Liquid Penetrate Inspection
Cheap way to see surface flaws in many different material. Liquid penetrate is applied and allowed to soak into cracks. Excess is removed. A developer is applied to allow cracks to be seen.
Ultrasonic Testing
Finds flaws by sound waves introduced at 1 million Hz. Can find deep or hidden flaws. Is fast with immediate results. Has trouble with flaws parallel to the sound waves. Takes a great deal of expertese to read.
Radiograph or x-ray
Based on x-ray technology. Shades on film are lighter as density increases. Flaws can be found but their depth is hard to determine. *Radiograph gives you a permanent record of the flaws or lack of. (it is recorded on film.
Destructive Methods
Bend tests Tensile Test Impact Test Hardness testing
Bend Tests
Face and root bend test Side bend test Fillet weld bend test Unguided bend test
Tensile Testing
Sample is pulled until it breaks and then a tensile strength is determined. Specimen is machined to a desired size prior to testing
Impact testing
Material is subject to an impact to test its toughness.
Hardness testing
Usually used for base material testing but can also can help determine a heat effected zone of a weld.
Weld Testing
Nondestructive
Destructive
Nondestructive Testing
Helps locate defects without damage to the weld. Welds can be repaired or replaced.
Nondestructive Methods
Visual Inspection (VT) Magnetic Particle Inspection (MT) Liquid Penetrate Inspection (PT) Ultrasonic Testing (UT) Xray or Raidograph (RT)
Visual Inspection
Tested Visually Tested for size, conformation, porosity, undercut, cracks, ect… Usually requires gauges, calipers, and scales. (can include cameras)
Magnetic Particle Inspection
Checks for surface or near surface flaws. Magnetic current is applied to the metal surface. A magnetic liquid or powder is then applied to locate cracks. Portable and can be moved to the job site Material must be magnetic.
Liquid Penetrate Inspection
Cheap way to see surface flaws in many different material. Liquid penetrate is applied and allowed to soak into cracks. Excess is removed. A developer is applied to allow cracks to be seen.
Ultrasonic Testing
Finds flaws by sound waves introduced at 1 million Hz. Can find deep or hidden flaws. Is fast with immediate results. Has trouble with flaws parallel to the sound waves. Takes a great deal of expertese to read.
Radiograph or x-ray
Based on x-ray technology. Shades on film are lighter as density increases. Flaws can be found but their depth is hard to determine. *Radiograph gives you a permanent record of the flaws or lack of. (it is recorded on film.
Destructive Methods
Bend tests Tensile Test Impact Test Hardness testing
Bend Tests
Face and root bend test Side bend test Fillet weld bend test Unguided bend test
Tensile Testing
Sample is pulled until it breaks and then a tensile strength is determined. Specimen is machined to a desired size prior to testing
Impact testing
Material is subject to an impact to test its toughness.
Hardness testing
Usually used for base material testing but can also can help determine a heat effected zone of a weld.
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