The lines, sometimes visible, resulting from the metal flowing outward from the center of a planchet as it is struck. The “cartwheel” luster is the result of light reflecting from these radial lines.
Deformation of the crystal structure revealed on a polished and etched section of a hot or cold formed piece which discloses the manner in which the metal is made to fill and follow a die contour.
Texture showing the direction of metal flow during hot or cold working. Flow lines can often be revealed by etching the surface or a section of a metal part. (2) In mechanical metallurgy, paths followed by minute volumes of metal during deformation.