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  An in-situ high-energy X-ray diffraction study on the hot-deformation behavior of a b-phase containing TiAl alloy

Schmoelzer, T., Liss, K.-D., Kirchlechner, C., Mayer, S., Stark, A., Peel, M. J., et al. (2013). An in-situ high-energy X-ray diffraction study on the hot-deformation behavior of a b-phase containing TiAl alloy. Intermetallics, 39, 25-33.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-1F61-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-1F63-8
Genre: Other
Alternative Title : Intermetallics

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 Creators:
Schmoelzer, T.1, Author              
Liss, K.-D.2, Author              
Kirchlechner, C.3, Author              
Mayer, S.1, Author              
Stark, A.4, Author              
Peel, M. J.5, Author              
Clemens, H. J.1, Author              
Affiliations:
1Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Franz-Josef Strasse 18, 8700 Leoben, Austria, ou_persistent22              
2Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2232, Australia, ou_persistent22              
3Department Materialphysik, Montanuniversität Leoben, Austria, ou_persistent22              
4Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany, ou_persistent22              
5Department of Mechanical Engineering, University of Bristol, Bristol, UK, ou_persistent22              

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 Abstract: In engineering materials, microstructural evolution during hot-working critically determines the properties of the finished part. Intermetallic TiAl alloys are no exception and numerous attempts have been made to improve their performance by subjecting them to harmonized hot-working steps. In the current work a novel in-situ diffraction technique along with conventional microscopic methods were employed to characterize the behavior of the individual phases at two different deformation temperatures. A so-called TNMTM alloy with a nominal composition of Ti-43.5 Al-4 Nb-1 Mo-0.1 B (in at%), which exhibits an adjustable fraction of disordered b-phase at elevated temperatures, was deformed isothermally at 1220°C and 1300°C. At 1220° C three phases (α, β, γ) are present in thermodynamic equilibrium which reduces to two (α, β) at 1300°C. It was possible to observe in-situ the individual behavior of the involved phases during deformation and the phenomena which accommodate the defects generated by hot-working. Results of post-mortem microscopic investigations were used to confirm the findings. The results of the in-situ experiments give unique insights into the hot-deformation behavior of multi-phase TiAl alloys, which can be used for specific process optimization and for further alloy development.

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 Dates: 2013-08
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1016/j.intermet.2013.02.016
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Title: Intermetallics
  Other : Intermetallics
Source Genre: Journal
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Publ. Info: Barking, Essex, England : Elsevier
Pages: - Volume / Issue: 39 Sequence Number: - Start / End Page: 25 - 33 Identifier: ISSN: 0966-9795
CoNE: /journals/resource/954925582175