Neu entwickelte TiAl-Basislegierungen für den Leichtbau von Triebwerks- und Motorkomponenten – Eigenschaften, Herstellung, Anwendung

Knippscheer, S.; Frommeyer, G.

doi:10.1002/mawe.200600067

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…Due to the steady increasing use of TiAl in combustion engines as an alternative to superalloys, pollutant emissions as well as fuel consumption can be reduced significantly. [2][3][4] Because of confidentiality reasons, no precise information on the TiAl content in combustion engines is available. In addition to the substitution of superalloys by titanium aluminides in the low pressure turbine (LPT), a further increase of the efficiency of combustion engines can be achieved by raising their operating temperature.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Slag Composition on the Fluorine Absorption in γ‐TiAl During Iesr

Spiess

Friedrich

2014

Gamma Titanium Aluminide Alloys 2014

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Because of the oxidation resistance of -TiAl-alloys the long term use is limited to temperatures up to 700 °C. In literature, it has been reported that the so called halogen effect has an outstanding improvement on the oxidation resistance of -TiAl. This implication is based on the forming of gaseous Al-halides which are oxidized to Al 2 O 3 on the surface resulting in a protective alumina scale.To investigate the absorption of fluorine in -TiAl during electroslag remelting and to enhance the oxidation resistance of the produced alloy by bulk-fluidization a series of tests was performed at IME. Hence, in a 400 kW lab scale furnace multiple electrodes of Ti-45Al were remelted by using a CaF 2 flux. The slag composition was varied by partially substitution of CaF 2 with MgF 2 . The alloys as well as the slag were analyzed on their composition to set up the fluorine content by influencing the melting parameters.

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Section: Introductionmentioning

confidence: 99%

Influence of the Slag Composition on the Fluorine Absorption in γ‐TiAl During Iesr

Spiess

Friedrich

2014

Gamma Titanium Aluminide Alloys 2014

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“…Figure 1) and TiAl in combustion engines as an alternative to superalloys, fuel consumption as well as pollutant emissions can be reduced significantly. [1][2][3] Because of confidentiality no precise information on the TiAl content in combustion engines are available.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Absorption of Fluorine in Gamma‐TiAl during Electroslag Remelting

Spiess¹,

Friedrich²

2013

Proceedings of the 2013 International Symposium on Liquid Metal Processing and Casting

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In literature, it has been reported that the so called "halogen effect" significantly improves the oxidation resistance of gamma-TiAl. This effect is based on the formation of gaseous Al-halides which are oxidized to Al 2 O 3 on the surface resulting in a protective alumina layer. To investigate the absorption of fluorine in gamma-TiAl during electroslag remelting and to enhance the oxidation resistance of the produced alloy by bulk-fluoridation, a series of tests was performed at IME. In a 400 kW lab scale furnace multiple electrodes of Ti-45Al were remelted using an active Ca-CaF 2 slag. Parameters like melt rate and Ca content in the slag were systematically varied. The ingots were sectioned and characterized by GDOS and EPMA to demonstrate the influence of the melting parameters on the efficiency of fluoridation as well as their impact on solidification structure with special regard to the distribution of fluorine.

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A Closed‐Loop Recycling Technology for γ‐TiAl from Precision Cast Low Pressure Turbine Blades

Spiess

Bartosinski

Stoyanov³

et al. 2015

Chemie Ingenieur Technik

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Due to the high generation of scrap in the process chain of γ‐TiAl semi‐finished goods and products, a suitable recycling process shows great potential to reduce production costs. Based on this circumstance, a closed loop recycling process for titanium‐aluminide scraps was developed. Resulting from this process, as a significant innovation for the titanium industry, it is possible to recycle titanium‐aluminide scraps and produce material with minimal oxygen content and almost no observable difference to primary alloys.

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Neu entwickelte TiAl-Basislegierungen für den Leichtbau von Triebwerks- und Motorkomponenten – Eigenschaften, Herstellung, Anwendung

Cited by 8 publications

References 19 publications

Influence of the Slag Composition on the Fluorine Absorption in γ‐TiAl During Iesr

Influence of the Slag Composition on the Fluorine Absorption in γ‐TiAl During Iesr

Experimental Research on the Absorption of Fluorine in Gamma‐TiAl during Electroslag Remelting

A Closed‐Loop Recycling Technology for γ‐TiAl from Precision Cast Low Pressure Turbine Blades

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