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Recast layer removal using ultrafast laser in titanium alloy

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Abstract

Recast layer, which has undesirable effects on the fatigue resistance and service life of components and microstructures, has been observed and analyzed from the points of surface morphology and internal microstructure by three test methods including scanning electron microscopy, metallographic corrosion analysis, and transmission electron microscopy in this study. In order to reduce the harms of these unwanted recast layers, taking ultrafast laser as a post-machining method for recast material removal is proposed based on the advantages of ultrafast laser micromachining technology, which include the wide material applicability and absence of the recast layer during processing. The feasibility of this new recast layer removal method was verified by experiments on Ti-6Al-4V. With a series of optimized processing parameters, horizontally bedded scanning processing was adopted ultimately in final recast layer removal experiment because of its higher material removal rate and better machined surface quality compared with vertically shifting scanning processing. Based on the theoretical analysis and experimental results, ultrafast laser could be widely applied in more fields of microstructures finish machining.

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Authors and Affiliations

  1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

    Chengjuan Yang, Xuesong Mei, Wenjun Wang, Kedian Wang & Gedong Jiang

  2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

    Xuesong Mei

Authors
  1. Chengjuan Yang
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  2. Xuesong Mei
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  3. Wenjun Wang
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  4. Kedian Wang
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  5. Gedong Jiang
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Correspondence to Xuesong Mei.

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Yang, C., Mei, X., Wang, W. et al. Recast layer removal using ultrafast laser in titanium alloy. Int J Adv Manuf Technol 68, 2321–2327 (2013). https://doi.org/10.1007/s00170-013-4849-5

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  • DOI: https://doi.org/10.1007/s00170-013-4849-5

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