Towards high-temperature applications of aluminium alloys enabled by additive manufacturing. (3rd April 2022)

• Record Type: Journal Article
• Authors: Michi, Richard A.; Plotkowski, Alex; Shyam, Amit; Dehoff, Ryan R.; Babu, Sudarsanam Suresh
• Is Part Of: International materials reviews. Volume 67:Number 3(2022)
• Page Start: 298
• Page End: 345
• Publication Date: 2022-04-03
• Subjects: Additive manufacturing -- aluminium alloys -- high-temperature materials -- alloy design -- mechanical properties -- microstructure -- corrosion -- economics; Materials science -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemical engineering -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/09506608.2021.1951580
• Languages: English
• ISSNs: 0950-6608

Abstract

ABSTRACT: Research on powder-based additive manufacturing of aluminium alloys is rapidly increasing, and recent breakthroughs in printing of defect-free parts promise substantial movement beyond traditional Al–Si–Mg) systems. One potential technological advantage of aluminium additive manufacturing, however, has received little attention: the design of alloys for use at T > ~200°C, or ~1/2 of the absolute melting temperature of aluminium. Besides offering lightweighting and improved energy efficiency through replacement of ferrous, titanium, and nickel-based alloys at 200–450°C, development of such alloys will reduce economic roadblocks for widespread implementation of aluminium additive manufacturing. We herein review the existing additive manufacturing literature for three categories of potential high-temperature alloys, discuss strategies for optimizing microstructures for elevated-temperature performance, and highlight gaps in current research. Although extensive microstructural characterisation has been performed on these alloys, we conclude that evaluations of their high-temperature mechanical properties and corrosion responses are severely deficient.