Microstructural design and mechanical properties of a cast and heat-treated intermetallic multi-phase γ-TiAl based alloy

Schwaighofer, Emanuel; Clemens, Helmut; Mayer, Svea; Lindemann, Janny; Klose, Joachim; Smarsly, Wilfried; Güther, Volker

doi:10.1016/j.intermet.2013.09.010

Cited by 369 publications

(225 citation statements)

References 41 publications

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“…However, it was revealed that Mo is worsening the corrosion resistance of c-TiAl [6]. Nevertheless, the effect of b-stabilizers on the phase diagram transformation of an alloyed material was first studied using the Ti-43.5Al-4Nb-1Mo (at.%) alloy as the typical example [7].…”

Section: The Concept Of Development and Engineering The Composition Omentioning

confidence: 99%

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Advanced Heat-Resistant TiAl (Nb,Cr,Zr)-Based Intermetallics with the Stabilized β(Ti)-Phase

Kartavykh

Gorshenkov

Korotitskiy

2017

Proceedings of the Scientific-Practical Conference "Research and Development - 2016"

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The paper represents a brief review of authors' research results and publications in the area of materials science and engineering of innovated lightweight heat-resistant TiAl-based intermetallic alloys. The system TiAl(Nb,Cr,Zr) under development is being considered as the advanced basis for the creation of TiAl-intermetallics of 3rd generation (TNM) TiAl(Nb,Mo)-like alloys, those being the most promising nowadays for an application in aviation jet engines design. This research is implemented within the frame of Federal Targeted Program for R&D in Priority Areas of Development of the Russian Scientific and Technological

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Section: The Concept Of Development and Engineering The Composition Omentioning

confidence: 99%

“…Since the volumetric fractions of these substructures are being formed as a result of nonequilibrium reactions, one can control them to some extent, applying different cooling rates and targeted thermal treatments [7,9].…”

Section: The Concept Of Development and Engineering The Composition Omentioning

confidence: 99%

Advanced Heat-Resistant TiAl (Nb,Cr,Zr)-Based Intermetallics with the Stabilized β(Ti)-Phase

Kartavykh

Gorshenkov

Korotitskiy

2017

Proceedings of the Scientific-Practical Conference "Research and Development - 2016"

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“…On this account, the phase diagram has been verified by Boeck [73] on the basis of heat treatment studies. These studies, in combination with differential scanning calorimetry (DSC), conventional XRD and HEXRD experiments, provided data for the eventual modification of the phase diagram [37,72,74].…”

Section: Studies Of Phase Evolutions In Tnm Alloysmentioning

confidence: 99%

“…In Figure 5a, the experimentally-verified quasi-binary section through the TNM alloying system is given [37]. An exemplary phase fraction evolution of a TNM alloy is shown in Figure 5b [37].…”

Section: Studies Of Phase Evolutions In Tnm Alloysmentioning

confidence: 99%

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In Situ Characterization Techniques Based on Synchrotron Radiation and Neutrons Applied for the Development of an Engineering Intermetallic Titanium Aluminide Alloy

Erdely

Schmoelzer

Schwaighofer

et al. 2016

Metals

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Abstract:Challenging issues concerning energy efficiency and environmental politics require novel approaches to materials design. A recent example with regard to structural materials is the emergence of lightweight intermetallic TiAl alloys. Their excellent high-temperature mechanical properties, low density and high stiffness constitute a profile perfectly suitable for their application as advanced aero-engine turbine blades or as turbocharger turbine wheels in next-generation automotive engines. As the properties of TiAl alloys during processing as well as during service are dependent on the phases occurring, detailed knowledge of their volume fractions and distribution within the microstructure is of paramount importance. Furthermore, the behavior of the individual phases during hot deformation and subsequent heat treatments is of interest to define reliable and cost-effective industrial production processes. In situ high-energy X-ray diffraction methods allow tracing the evolution of phase fractions over a large temperature range. Neutron diffraction unveils information on order-disorder transformations in TiAl alloys. Small-angle scattering experiments offer insights into the materials' precipitation behavior. This review attempts to shine a light on selected in situ diffraction and scattering techniques and the ways in which they promoted the development of an advanced engineering TiAl alloy.

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Fundamental and Application‐Oriented Research on Gamma Alloys

Yang

2014

Gamma Titanium Aluminide Alloys 2014

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Recent activities of 7 -T i A l related research at I M R is reviewed in this p a p e r . O n t h e f u n d a m e n t a l side, first principles computations were performed t o relate site occupancies and atomic interactions t o t h e mechanisms of s t r e n g t h e n i n g and phase t r a n s f o r m a t i o n , and to u n d e r s t a n d surface adsorption of oxygen a n d oxidation. D e f o r m a t i o n f u n d a m e n t a l s such as nucleation of superdislocations in t h e 7 phase were studied t h r o u g h molecular d y n a m i c s modeling. O u r application-oriented work covers extrusion a n d n e t -s h a p e forming t h a t includes b o t h precision casting a n d powder metallurgy. T h e evolution of textures d u r i n g t h e coupled process of deformation, phase transformation, recrystallization a n d grain g r o w t h during extrusion and subsequent heat t r e a t m e n t was characterized a n d related to mechanical properties. Centrifugal casting was employed to obtain quality p a r t s having thin sections b u t large size in 1-or 2-dimensions, a n d t h e problems such as misrun, cavities, surface porosity a n d inclusion as well as dimension distortion were tackled. Powder metallurgy was studied essentially as a technology u p g r a d e of precision casting, forming c o m p o n e n t s of complex s h a p e .

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Microstructural design and mechanical properties of a cast and heat-treated intermetallic multi-phase γ-TiAl based alloy

Cited by 369 publications

References 41 publications

Advanced Heat-Resistant TiAl (Nb,Cr,Zr)-Based Intermetallics with the Stabilized β(Ti)-Phase

Advanced Heat-Resistant TiAl (Nb,Cr,Zr)-Based Intermetallics with the Stabilized β(Ti)-Phase

In Situ Characterization Techniques Based on Synchrotron Radiation and Neutrons Applied for the Development of an Engineering Intermetallic Titanium Aluminide Alloy

Fundamental and Application‐Oriented Research on Gamma Alloys

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