The Process Parameters Extended Criterion for Laser Engineered Net Shaping of Inconel 738

  • Yang Zhou
  • Zhaoyang Liu
  • Chuan Guo
  • Guowei Ye
  • Xin Li
  • Qiang ZhuEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Laser engineered net shaping processing has been an efficient technique for the rapidly manufacturing high-temperature superalloy parts in recent years. While, for the high crack susceptibility superalloy such as Inconel 738 alloy, the current flawless processing window is very narrow and resultantly limits the application of laser engineered net shaping processing in the area of turbine engines due to discreteness and complexed mutual correlation of the process parameters. In this work, experiments were conducted to study the effect of processing parameters such as laser power and scanning speed on the formability, especially the crack formation and distribution, of laser manufactured Inconel 738 alloy. The results indicate that the element Ti segregation and low-meting point \( \upgamma/\upgamma^{{\prime }} \) eutectic generation at the high-angle grain boundary lead to continuous liquid film form during the heating process and then generates cracks under the induction of inclusions such as carbides during the cooling of periodic depositing process. Reducing the element, Ti segregation by optimizing processing parameters and suppression of the remolten of \( \upgamma/\upgamma^{{\prime }} \) eutectic during the periodic depositing process can efficiently expand the flawless window for the directly manufacturing Inconel 738 alloy by laser engineered net shaping process.


Laser engineered net shaping Inconel 738 superalloy Process parameter 



This work was supported by the National Natural Science Foundation of China (Grant Nos. 91860131 and 51905253) and Shenzhen Science and Technology Innovation Commission (Project Nos. KQTD20170328154443162 and JCYJ20170817111811303)


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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Yang Zhou
    • 1
    • 2
  • Zhaoyang Liu
    • 2
    • 3
  • Chuan Guo
    • 2
    • 3
  • Guowei Ye
    • 2
  • Xin Li
    • 2
  • Qiang Zhu
    • 2
    • 3
    Email author
  1. 1.Harbin Institute of TechnologyHarbinChina
  2. 2.Department of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhenChina
  3. 3.Shenzhen Key Laboratory for Additive Manufacturing of High-Performance MaterialsSouthern University of Science and TechnologyShenzhenChina

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