5 years ago

Nanosecond laser coloration on stainless steel surface

Marko Huttula, Taohai Li, Zhongjia Huang, Wei Cao, Meng Zhang, Jakub Czajkowski, Xinying Shi, Tapio Fabritius, Yan Lu
In this work, we present laser coloration on 304 stainless steel using nanosecond laser. Surface modifications are tuned by adjusting laser parameters of scanning speed, repetition rate, and pulse width. A comprehensive study of the physical mechanism leading to the appearance is presented. Microscopic patterns are measured and employed as input to simulate light-matter interferences, while chemical states and crystal structures of composites to figure out intrinsic colors. Quantitative analysis clarifies the final colors and RGB values are the combinations of structural colors and intrinsic colors from the oxidized pigments, with the latter dominating. Therefore, the engineering and scientific insights of nanosecond laser coloration highlight large-scale utilization of the present route for colorful and resistant steels.

Publisher URL: https://www.nature.com/articles/s41598-017-07373-8

DOI: 10.1038/s41598-017-07373-8

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