T.O. 33B-1-1Glossary 61PARALLEL MAGNETIZATION: A magnetic field induced in a piece of magnetizable material that is placed parallelto a conductor carrying an electric current.PARAMAGNETIC (MT): Materials in which the magnetic permeability is slightly greater than one. These materialsare classified as nonmagnetic with a permeability of one for purposes of eddy current inspection. A material which canbe slightly magnetized, but not sufficiently to permit magnetic particle inspection.PART: A term used to refer to a manufactured article that is being inspected.PARTICLE: A minute constituent of matter with a measurable mass, such as a neutron, proton, or meson.PARTICLE MOTION (UT): Movement of particles in an article brought about by the action of a transducer.PARTICLE (RT): A minute constituent of matter with a measurable mass, such as an electron, neutron, proton, ormeson.PARTICULATE RADIATION (RT): Radiation consisting of charged or uncharged atomic particles.PARTING LINE: The line along which a pattern is divided for molding or along which the sections of a mold separate.PASTE (MAGNETIC): Finely divided, ferromagnetic particles in paste form used in preparing wet suspensionsmagnetic particle inspection.PEAK VOLTAGE (RT): The maximum value achieved by a varying voltage.PENETRABILITY (PT): The property of a penetrant that causes it to find its way into very fine openings, such ascracks.PENETRAMETER (RT): A device employed to obtain evidence on a radiograph that the technique used wassatisfactory. It is not intended for use in judging the size of discontinuities nor for establishing acceptance limits formaterials or products.PENETRAMETER SENSITIVITY (RT): See SENSITIVITY, RADIOGRAPHIC.PENETRANT (PT): A liquid of high surface tension and high capillary action which is a vehicle for a colored or afluorescent dye, used to penetrate into the defect and detect surface discontinuities.PENETRANT INDICATION: Readings that mark or denote the presence of material defects.PENETRANT, POST EMULSIFIABLE (PT): A penetrant that requires the application of a separate emulsifier torender the surface penetrant water-washable.PENETRANT REMOVER (PT): A penetrant remover is a solvent-type liquid used to clean penetrants from the surfaceof a material.PENETRANT SENSITIVITY (PT): Penetrant sensitivity is the ability of the penetrant, processing technique, anddeveloper to detect surface-connected discontinuities and provide an indication visible to the unaided eye.PENETRANT, VISIBLE (PT): A penetrant that is characterized by an intense visible color, usually red, that allows itto give contrasting indications on a white developer background.PENETRANT, WATER-WASHABLE (IT): See WATER-WASHABLE.PENETRATION: The maximum depth from which indications can be measured in a material.
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