Alloy design against the solidification cracking in fusion additive manufacturing: an application to a FeCrAl alloy

Dovgyy, Bogdan; Simonelli, Marco; Pham, Minh Son

Abstract

This study developed a design methodology against liquid-state cracking by combining the Scheil–Gulliver solidification simulations and Machine Learning analysis to design alloys for Fusion Additive Manufacturing. Applying this design approach resulted in a Fe–20Cr–7Al–4Mo–3Ni. The alloy was successfully printed with relative densities ofover 99%. Microstructure of printed material was extensively characterised through scanning and transmission electron microscopy, energy dispersive spectroscopy and x-ray diffraction, confirming a single-phase material with low texture and negligible chemical segregation. Neither solidification nor liquation cracks were detected, supporting the validity of the methodology, however, the alloy suffered from solid-state cracking, hindering the ductility.

Citation

Dovgyy, B., Simonelli, M., & Pham, M. S. (2021). Alloy design against the solidification cracking in fusion additive manufacturing: an application to a FeCrAl alloy. Materials Research Letters, 9(8), 350-357. https://doi.org/10.1080/21663831.2021.1922945

• Journal Article Type: Article
• Acceptance Date: Apr 24, 2021
• Online Publication Date: May 13, 2021
• Publication Date: Aug 3, 2021
• Deposit Date: May 17, 2021
• Publicly Available Date: May 20, 2021
• Journal: Materials Research Letters
• Electronic ISSN: 2166-3831
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 8
• Pages: 350-357
• DOI: https://doi.org/10.1080/21663831.2021.1922945
• Public URL: https://nottingham-repository.worktribe.com/output/5536060
• Publisher URL: https://www.tandfonline.com/doi/full/10.1080/21663831.2021.1922945