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Towards high-temperature applications of aluminium alloys enabled by additive manufacturing.

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Title: Towards high-temperature applications of aluminium alloys enabled by additive manufacturing.
Authors: Michi, Richard A.1 (AUTHOR) michira@ornl.gov, Plotkowski, Alex1 (AUTHOR), Shyam, Amit1 (AUTHOR), Dehoff, Ryan R.2 (AUTHOR), Babu, Sudarsanam Suresh3 (AUTHOR)
Source: International Materials Reviews. Apr2022, Vol. 67 Issue 3, p298-345. 48p.
Subjects: Aluminum alloys, Titanium powder, Energy consumption, Titanium, Alloys, Aluminum, Microstructure
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. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
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. [ABSTRACT FROM AUTHOR]
ISSN:09506608
DOI:10.1080/09506608.2021.1951580