Abrupt transition from wavelength structure to subwavelength structure in a single-crystal superalloy induced by femtosecond laser

Wei Zhang, Guanghua Cheng, Qiang Feng, Lamei Cao, Fengping Wang, Rongqing Hui

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32 引用 (Scopus)

摘要

The abrupt transition from low-spatial-frequency laser-induced periodic surface structure (LSFL) to high-spatial-frequency laser-induced periodic surface structure (HSFL) in single-crystal superalloy CMSX-4 during femtosecond laser irradiation has been reported. Microstructural investigations indicate that the transition was initiated by the generation of new grooves on the main ridges of LSFL ripples. This transition resulted in the period of HSFL nearly equal to half of LSFL period. Furthermore, the relationship between both LSFL and HSFL and their parametric dependence was established. The microstructural observation of the abrupt transition provides a morphological evidence of second harmonic generation being responsible for the formation of HSFL.

源语言英语
页(从-至)4321-4324
页数4
期刊Applied Surface Science
257
9
DOI
出版状态已出版 - 15 2月 2011
已对外发布

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