WELDING BASICS
This is the basic definition of welding:
Using heat to do this to a metal piece until they stick together
Melt
NDT stands for?
Non-Distructive testing
This method uses high-frequency sound waves and can also measure material thickness.
Ultrasonic Testing (UT)
This defect appears as small holes or bubbles trapped in the weld metal.
porosity
This scientist discovered X-rays in 1895, launching radiographic inspection
Wilhelm Röntgen
In the SMAW diagram, this component connects the electrode to the welding power
supply and is held by the operator (the welder)
Welding holder
NDT is the process if testing welding conditions without doing what to the welded part?
Damaging or changing its physical properties
his method uses X-rays or gamma rays to visualize internal porosity and slag
Radiographic Testing (RT)
This defect is a groove melted into the base metal along the edge of the weld, left unfilled
undercut
This early 1900s railway industry technique used oil and white chalk to reveal cracks in axles.
Oil and Whiting Method
this is the full name of the SMAW diagram shown in you slides
Shielded metal arc Welding
This industry relies on NDT for pipe and structural quality assurance
Welding and piping
This method relies on ferromagnetic materials and reveals surface/near-surface cracks via a "leakage field."
Magnetic Particle Testing (MPT/MT)
This defect occurs when the weld metal doesn't properly bond/fuse with the base metal or previous pass
lack of fusion
This global conflict significantly accelerated NDT technology due to mass production of ships, aircraft, and armaments
World War II
In the SWAM setup, this consumable component melts to form the actual weld of the workpiece
The electrode
Out of the Five main NDT methods, this is call the first line of inspection because it is quick and simple
Visual testing
This five-step method involves cleaning, applying colored dye, removing excess, and applying a developer
Dye/Liquid Penetrant Testing (DPT/PT)
This defect happens when non-metallic material gets trapped inside the weld during the process.
slag inclusion
This scientist patented the "Supersonic Reflectoscope" in 1940, launching Ultrasonic Testing.
Dr. Floyd Firestone
This is the piece of metal being joined, labeled at the bottom of the SMAW diagram
The workpiece
What is the symbol for Visual Testing?
Visual Testing (VT)
This method uses electromagnetic induction to detect flaws in conductive materials, developed in the 1930s–40s.
Eddy Current Testing (ET)
This is the most serious weld defect, appearing as a linear break or fissure in the material.
crack
This decade pair saw the rise of computing power, allowing NDT data to be digitized and recorded.
the 1970s and 1980s