In-situ study of the time–temperature-transformation behaviour of a multi-phase intermetallic β-stabilised TiAl alloy

Erdely, Petra; Werner, Robert; Schwaighofer, Emanuel; Clemens, Helmut; Mayer, Svea

doi:10.1016/j.intermet.2014.09.011

Cited by 59 publications

(50 citation statements)

References 30 publications

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“…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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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%

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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“…For the sake of completeness, it should be noted that with an increasing brilliance of today's synchrotron radiation sources, ordering and disordering reactions in TiAl alloys can also be studied by means of in situ HEXRD experiments. Due to the structure factor, however, the intensities of superstructure reflections are generally very weak [87].…”

Section: Neutron Diffraction Studies On Order/disorder Transformationmentioning

confidence: 99%

“…To investigate the influence of technologically relevant cooling rates on the evolution of the γ phase during the second heat treatment step, a TNM alloy with increased amounts of β-stabilizing alloying elements Nb and Mo was studied by means of in situ HEXRD [87]. The diffraction experiments were conducted partly at HARWI II and partly at PETRA III.…”

Section: Studies Enabling the Targeted Optimization Of Heat Treatmentmentioning

confidence: 99%

“…In this plot, broad black lines confine regions in which the indicated γ phase fraction is exceeded. Experimental points representing conditions close to thermodynamic equilibrium were obtained from preliminary diffraction experiments [87]. Figure 14.…”

Section: Studies Enabling the Targeted Optimization Of Heat Treatmentmentioning

confidence: 99%

“…The cooling paths plotted as narrow black lines result from the linear cooling rates of 35, 300, 500, 900 and 1200 K¨min´1, respectively. Thus, the influence of technologically relevant cooling rates on the quantitative gain in the γ phase can be derived [87]. Actual γ phase fractions (in m %) before and after cooling are indicated in the boxes at the bottom.…”

Section: Studies Enabling the Targeted Optimization Of Heat Treatmentmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

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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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Atomistic Modeling‐Based Design of Novel Materials

Holec¹,

Zhou

Riedl

et al. 2017

Adv Eng Mater

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Modern materials science increasingly advances via a knowledge-based development rather than a trialand-error procedure. Gathering large amounts of data and getting deep understanding of non-trivial relationships between synthesis of materials, their structure and properties is experimentally a tedious work. Here, theoretical modeling plays a vital role. In this review paper we briefly introduce modeling approaches employed in materials science, their principles and fields of application. We then focus on atomistic modeling methods, mostly quantum mechanical ones but also Monte Carlo and classical molecular dynamics, to demonstrate their practical use on selected examples. of the Deutsche Forschungsgemeinschaft (DFG). D.M. acknowledges the Collaborative Research Center SFB-TR 87/2 "Pulsed high power plasmas for the synthesis of nanostructured functional layers" of the DFG. The computational results presented have been achieved in part using the Vienna Scientific Cluster (VSC).

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In-situ study of the time–temperature-transformation behaviour of a multi-phase intermetallic β-stabilised TiAl alloy

Cited by 59 publications

References 30 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

Atomistic Modeling‐Based Design of Novel Materials

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