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Comparative investigation on grindability of Inconel 718 made by selective laser melting (SLM) and casting

  • Zhonglei Liu
  • Xuekun LiEmail author
  • Xiaodan Wang
  • Chenchen Tian
  • Liping Wang
ORIGINAL ARTICLE
  • 52 Downloads

Abstract

Inconel 718 is increasingly manufactured by selective laser melting (SLM) for its excellent capability to shape complex parts. However, due to the limitation of current SLM process accuracy, for the parts with high accuracy and surface integrity requirements, subsequent process such as grinding is still necessary. SLM Inconel 718 possesses an anisotropic metallurgy microstructure that makes its grindability different from the conventionally made Inconel 718. Therefore, the grinding wheel wear and surface integrity of SLM Inconel 718 after grinding should be investigated for in-depth understanding of the correlation of SLM material property with its grindability. In this paper, inhomogeneous material properties and mechanical properties are characterized for SLM Inconel 718. Then, grinding experiments are conducted on both SLM and casting Inconel 718 for comparison. In order to investigate the effect of layer structure on the grindability and its variation trend in the whole grinding process, a step-traverse grinding mode is proposed to reserve the process status. Finally, the grinding wheel wear, power consumption, and surface integrity are measured for both samples. Furthermore, the correlation of the material properties with the grindability is analyzed, which will shed light on the process optimization for high-quality SLM Inconel 718 grinding for its reliable service in practical applications.

Keywords

SLM Inconel 718 Casting Inconel 718 Grindability Grinding power Ground surface 

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Notes

Funding

The research is supported by National Science and Technology Major Project 2017ZX04007001. The authors would also like to thank the support from Tsinghua University Initiative Scientific Research Program.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  • Zhonglei Liu
    • 1
  • Xuekun Li
    • 1
    • 2
    • 3
    Email author
  • Xiaodan Wang
    • 4
  • Chenchen Tian
    • 1
  • Liping Wang
    • 1
    • 2
    • 3
  1. 1.Department of Mechanical EngineeringTsinghua UniversityBeijingChina
  2. 2.Beijing Key Lab of Precision/Ultra-Precision Manufacturing Equipment and ControlBeijingChina
  3. 3.State Key Lab of TribologyBeijingChina
  4. 4.Electromechanical Products DivisionBeijing Spacecrafts CorpBeijingChina

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