T.O. 33B-1-1Glossary 51LINE FOCUS PRINCIPLE (RT): The process of making the angle between the anode face and the central ray such thatthe effective focal spot is small in relation to the actual spot size.LINE-FOCUS TUBE (RT): An X-ray tube in which the electron focus is approximately a rectangle and the foal spotsize is approximately a square.LINES OF FORCE (MT): Imaginary lines used to visualize the magnetic field.LIMITS (dose limits): The permissible upper bounds of radiation doses.LIPOPHILIC (PT): An oil based liquid used in penetrant inspection to make penetrant oil water-washable.LIQUID VEHICLE (MT): The liquid in which the magnetic particles are suspended to facilitate their application.LOCALIZING CONE (COLLIMATING CONE) (RT): A cone that limits the divergence of a beam of radiation.LONGITUDINAL MAGNETIZATION (MT): Magnetization of a material in such a way that the magnetic lines offorce are essentially parallel to the test parts longitudinal axis.LONGITUDINAL WAVE (UT): A type of wave in which the particle motion of the material is essentially in the samedirection as the wave propagation.LOSS OF BACK REFLECTION (UT): Absence of an indication of the far surface of the article being inspected.LUDERS’ LINES: Lines that are produced on the surface of low carbon steel by deforming the metal just past the yieldpoint.LUMEN (PT, MT): A measure of the brightness of light. A unit of luminous flux equal to the light emitted in a unitsolid angle by uniform point source of one candle.LUMINESCENCE (RT): A phenomenon in which the absorption of radiation by a substance gives rise to the emissionof light characteristic of the substance.MMACMNEABILITY: Refers to the ease and speed with which a metal may be cut (with free chip removal) to produce areasonably smooth surface.MACHINED SURFACE: The metal surface left by the cutting tool.MACHINING: Removing material, in the form of chips, from work, usually through the use of a machine.MACHINING STRESS: Residual stress caused by machining.MACRO-ETCH: Etching of a metal surface for accentuation of gross structural details and defects for observation bythe unaided eye or at magnifications not exceeding ten diameters.MACROGRAPH: A graphic reproduction of the surface of a prepared specimen at a magnification not exceeding tendiameters. When photographed, the reproduction is known as a photomacrograph.MACRO INSPECTION: Utilizes deep etch and examination under low magnification up to 10 diameters. It revealsflow lines, etc.
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
