Archives of Metallurgy and Materials

Institute of Metallurgy and Materials Science of Polish Academy of Sciences
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Effect of Microstructure and Unit Cell's Geometry on the Compressive Mechanical Response of Additively Manufactured Co-Cr-Mo Sheet I-WP Lattice

  • So-Yeon Park (Inha University, Department of Materials Science and Engineering) ;
  • Kyu-Sik Kim (Agency for Defense Development) ;
  • Bandar Almangour (Interdisciplinary Research Center for Intelligent Manufacturing & Robotics, King Fahd University of Petroleum & Minerals) ;
  • Kee-Ahn Lee (Inha University, Department of Materials Science and Engineering)
  • Published : 20220000
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Abstract

Co-Cr-Mo based sheet I-WP lattice was fabricated via laser powder bed fusion. The effect of microstructure and the I-WP shape on compressive mechanical response was investigated. Results of compression test showed that yield strength of the sheet I-WP was 176.3 MPa and that of bulk Co-Cr-Mo (reference material) was 810.4 MPa. By applying Gibson-Ashby analytical model, the yield strength of the lattice was reversely estimated from that of the bulk specimen. The calculated strength of the lattice obtained was 150.7 MPa. The shape of deformed lattice showed collective failure mode, and its microstructure showed that strain-induced martensitic transformation occurred in the overall lattice. The deformation behavior of additively manufactured sheet I-WP lattice was also discussed.

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Acknowledgement

This research was supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) (P0002007, The Competency Development Program for Industrial Specialist)