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Neumann lines[′nȯi‚män ‚līnz]
Mechanical deformation twins seen as straight, serrated narrow bands parallel to preferred planes in the crystals of an etched metal which has been strained, usually by sudden impact; most often observed along the 112 planes of body-centered-cubic ferrite. Also known as Neumann bands.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.