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High-temperature alloys

Single-crystal performance boost

Titanium aluminide alloys are lightweight and have attractive properties for high-temperature applications. A new growth method that enables single-crystal production now boosts their mechanical performance.

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Figure 1: Degradation of room-temperature strength (blue) and ductility (red) of a polycrystalline TiAl alloy (Ti–48Al–2Cr–2Nb) after exposure to air at different temperatures for 100 hours.
Figure 2: The single-crystal alloys reported by Chen et al.2 show only a slight reduction in mechanical performance, up to a temperature of approximately 900 °C (vertical dashed line).


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Correspondence to Michael Schütze.

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Schütze, M. Single-crystal performance boost. Nature Mater 15, 823–824 (2016).

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