OXIDE GROWTH AND COLOR FORMATION OF STAINLESS STEEL AND TITANIUM USING A MOPA FIBER LASER

摘要

Growth of chromium oxide layer on the surface ofrnstainless steel and titanium oxide on titanium arernshown to lead to color formation of the surface. Thisrngrowth is demonstrated using a MOPA fiber laser byrncontrol of power delivery to the surface or pulsernoverlap. Color change of the surface is also shownrnlinked to its chemical composition of the surface or thrnthickness of the oxide layer.