Microstructure and properties of a high temperature Al–Ce–Mn alloy produced by additive manufacturing. (1st September 2020)

• Record Type: Journal Article
• Authors: Plotkowski, A.; Sisco, K.; Bahl, S.; Shyam, A.; Yang, Y.; Allard, L.; Nandwana, P.; Rossy, A. Marquez; Dehoff, R.R.
• Is Part Of: Acta materialia. Volume 196(2020)
• Page Start: 595
• Page End: 608
• Publication Date: 2020-09-01
• Subjects: Additive manufacturing -- Al alloys -- Mechanical properties -- Characterization; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2020.07.014
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: An Al–10Ce-8Mn (wt%) alloy was designed and fabricated by laser powder bed fusion additive manufacturing (AM). The rapid cooling rates of the AM process produced a refined microstructure with a large fraction of reinforcing intermetallic phases. The tensile properties of the alloy were characterized in the as-fabricated state and following thermal exposure. The properties of the as-fabricated microstructure showed exceptional high-temperature performance and strength retention at elevated temperatures up to 400 °C relative to benchmark wrought Al and AM Al alloy properties. Characterization of the microstructure and thermodynamic modeling of the ternary Al–Ce–Mn system rationalized the solidification and solid-state phase transformations. Analysis of the relevant strengthening mechanisms for both the as-fabricated and thermally exposed conditions was performed. Graphical abstract: Image, graphical abstract