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Enhancement of strength and ductility in LPBFed Cu-Cr-Zr alloy by combined parametric approach

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Abstract

For a past few years, laser powder bed fusion (LPBF) process faced many issues such as cavity creation, unstable thermal capillary convection, and thermodynamic instability during the printing of Cu-Cr-Zr alloy. Hence, the important LPBF process variables such as exposure duration (ED) of 300, 400, and 500 µs; laser power (LP) of 370, 420, and 470 W; and overlap** percentage (OP) of 20, 40, and 60% needs to be examined based on the interactions of various combinations of parameters to fabricate a Cu-Cr-Zr alloy parts with reduced porosity, maximum ultimate tensile strength (UTS), and minimum nano-indentation depth (NID). Moreover, analytical studies were also performed based on the COmplex PRoportional ASsessment (COPRAS) approach. The proposed analytical approach shows better concurrence with the experimental observations. The optimal and initial variables obtained from the analytical and experimental approach were compared. The Cu-Cr-Zr alloy printed with optimal parameter settings possesses maximum UTS of 367 MPa and minimum NID of 321.51 nm. These enhanced results were mainly due to the occurrence of reduced porosity of 0.27%. Moreover, FESEM based fracture mechanism were investigated to study the propagation of cracks based on the defects formation.

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Data availability

The experimental datasets obtained from this research work and then the analysed results during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We are grateful for the support from the Ministry of Science and Technology, Taiwan for providing the financial support.

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Authors and Affiliations

  1. Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei, 10608, Taiwan

    Saravana Kumar Murugesan & Che-Hua Yang

  2. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Jeyaprakash Natarajan

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  1. Saravana Kumar Murugesan
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Correspondence to Saravana Kumar Murugesan.

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Murugesan, S.K., Natarajan, J. & Yang, CH. Enhancement of strength and ductility in LPBFed Cu-Cr-Zr alloy by combined parametric approach. Int J Adv Manuf Technol 130, 2999–3015 (2024). https://doi.org/10.1007/s00170-023-12874-0

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