Investigation of tetragonal micro-texture on 7075 aluminum alloy surface processed by femtosecond laser

Li Zhang; Chunhai Guo; Tong Liu; Zhifang Yang; Wenwu Zhang

doi:10.1117/12.2656601

16 December 2022 Investigation of tetragonal micro-texture on 7075 aluminum alloy surface processed by femtosecond laser

Li Zhang, Chunhai Guo, Tong Liu, Zhifang Yang, Wenwu Zhang

Author Affiliations +

Proceedings Volume 12501, Seventeenth National Conference on Laser Technology and Optoelectronics; 1250119 (2022) https://doi.org/10.1117/12.2656601
Event: Seventeenth National Conference on Laser Technology and Optoelectronics, 2022, Shanghai, China

Abstract

Recently, researchers have found that the friction pairs with diverse surface micro-textures have excellent wear resistance. However, the traditional micro-texture processing technology is difficult to accurately control the depth and shape of the texture. In this paper, in order to obtain the micro-texture with accurate depth and regular shape, the femtosecond laser was used to process micro-texture on the surface of 7075 aluminum alloy, and the laser process parameters were optimized to realize the precision and smoothness of micro-texture depth and shape. The results show that the increase of laser processing power and scanning times can effectively lead to the increase of microtexture depth within a certain range, and the decrease of filling space has the similar effect. However, the depth of micro-texture decreases with increasing scanning speed, and excessive scanning speed can result in the uneven structure of micro-texture, especially on the edge and at the bottom. Subsequently, the quality of micro-texture is decreased. Therefore, it is necessary to control the processing parameters to achieve high quality process, so as to obtain a smooth edge of the micro texture.

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Li Zhang, Chunhai Guo, Tong Liu, Zhifang Yang, and Wenwu Zhang "Investigation of tetragonal micro-texture on 7075 aluminum alloy surface processed by femtosecond laser", Proc. SPIE 12501, Seventeenth National Conference on Laser Technology and Optoelectronics, 1250119 (16 December 2022); https://doi.org/10.1117/12.2656601

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KEYWORDS

Femtosecond phenomena

Laser processing

Technology

Alloys

Aluminum

Laser energy

Pulsed laser operation

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