Role of alloy composition on micro-cracking mechanisms in additively manufactured Ni-based superalloys

Chakraborty, Apratim; Muhammad, Waqas; Masse, Jean-Philippe; Tangestani, Reza; Ghasri-Khouzani, Morteza; Wessman, Andrew; Martin, Étienne

doi:10.1016/j.actamat.2023.119089

Cited by 19 publications

(1 citation statement)

References 33 publications

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“…A lack of a comprehensive understanding of the material and process-related phenomena may lead to significant issues because of the many material-and process-related variables [35][36][37]. Given the localized heat source employed in the LPBF, the exquisite and iterative stacking process of the melt pools can give rise to defects, such as numerous pores and cracks, distortion, and delamination, under inappropriate conditions [38][39][40][41]. The formation of these defects is influenced by factors including the powder spreading, particle and melt pool dynamics, and the resultant deposited melt pools [42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Strategies and Outlook on Metal Matrix Composites Produced Using Laser Powder Bed Fusion: A Review

Kim,

Fang,

Kim

et al. 2023

Metals

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Particle-reinforced metal matrix composites (MMCs) produced using the laser powder bed fusion (LPBF) technique have gained considerable attention because of their distinct attributes and properties in comparison with conventional manufacturing methods. Nevertheless, significant challenges persist with LPBF-fabricated MMCs: more design parameters over commercially available alloys and several defects resulting from inappropriate process conditions. These challenges arise from the intricate interaction of material- and process-related phenomena, requiring a fundamental understanding of the LPBF process to elucidate the microstructural evolution and underlying mechanisms of strengthening. This paper provides a comprehensive overview of these intricate phenomena and mechanisms, aiming to mitigate the process-related defects and facilitate the design of MMCs with enhanced mechanical properties. The material processing approach was suggested, covering from material design and LPBF to postprocessing. Furthermore, the role of in situ heat treatment on the microstructure evolution of MMCs was clarified, and several novel, potential strengthening theories were discussed for the LPBF-fabricated MMCs. The suggested strategies to address the challenges and design high-performance MMCs will offer an opportunity to develop promising LPBF-fabricated MMCs, while overcoming the material limitations of LPBF.

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