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Investigating the Influences of Wet Fiber Laser Cutting Upon the Surface Integrity of Nitinol Cardiovascular Stents

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Abstract

High precision laser cutting with minimal post-treatment is needed in the manufacturing of nitinol cardiovascular stents. This paper carries out a series of cutting experiments of nitinol cardiovascular stents by wet fiber laser cutting to understand the basic process characteristics and to investigate the influences of process parameters (laser power, cutting speed, pulse width, frequency) upon the surface integrity (surface topography, dross, surface roughness, HAZ, recast layer, subsurface nanohardness, surface chemical composition). The univariate analysis was used to analyze and explain the influence that rules of process parameters had upon the surface integrity. The experiment results showed that the effects of process parameters on surface integrity were regular, with the optimal single-factor parameters obtained. Moreover, the removal mechanism of the nitinol material was also revealed. This study is of great significance for the medical industry in improve the cutting quality of cardiovascular stents.

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Acknowledgements

The present study acknowledged financial supported from National Natural Science Foundation of China (No.51775321) and Key Research and Development Program (public welfare) Project of Shandong Education Department (No. 2017GGX30116).

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Authors and Affiliations

  1. School of Mechanical Engineering, Shandong University of Technology, Zibo, 255049, China

    Xiaoyu Sun, Xiuting Wei, Yongqi Wang & Hanqing Liu

  2. Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, 255049, China

    Zhiyong Li

  3. Weihai Visee Medical Device Co., LTD, Weihai, 264200, China

    Deda Lou

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  1. Xiaoyu Sun
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  2. Xiuting Wei
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Correspondence to Xiuting Wei.

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Sun, X., Wei, X., Li, Z. et al. Investigating the Influences of Wet Fiber Laser Cutting Upon the Surface Integrity of Nitinol Cardiovascular Stents. Int. J. Precis. Eng. Manuf. 22, 1237–1248 (2021). https://doi.org/10.1007/s12541-021-00522-0

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  • DOI: https://doi.org/10.1007/s12541-021-00522-0

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