Alloy design against the solidification cracking in fusion additive manufacturing: an application to a FeCrAl alloy. Issue 8 (3rd August 2021)

• Record Type: Journal Article
• Authors: Dovgyy, Bogdan; Simonelli, Marco; Pham, Minh-Son
• Is Part Of: Materials research letters. Volume 9:Issue 8(2021)
• Page Start: 350
• Page End: 357
• Publication Date: 2021-08-03
• Subjects: Additive manufacturing -- laser powder bed fusion -- alloy design -- printability -- microstructure; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2021.1922945
• Languages: English
• ISSNs: 2166-3831

Abstract

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 of over 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. GRAPHICAL ABSTRACT: IMPACT STATEMENT: A design methodology against solidification and liquation cracking and chemical segregation to assist the alloy design for Additive Manufacturing.