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  Deformation behavior of a β-solidifying TiAl alloy within β phase field and its effect on the β→α transformation

Chen, Y., Cheng, L., Yang, G., Lu, Y., & Han, F. (2018). Deformation behavior of a β-solidifying TiAl alloy within β phase field and its effect on the β→α transformation. Metals, 8(8): 605. doi:10.3390/met8080605.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-1B04-C Version Permalink: http://hdl.handle.net/21.11116/0000-0002-1B06-A
Genre: Journal Article

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 Creators:
Chen, Yi1, 2, Author              
Cheng, Liang1, Author              
Yang, Guang3, Author              
Lu, Yalin4, Author              
Han, Fengbo5, Author              
Affiliations:
1School of Materials Engineering, Jiangsu University of Technology, Changzhou, Jiangsu, China, persistent22              
2Sunnywell (China) New Material Technology Co., Ltd., Changzhou 213000, China, persistent22              
3College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, China, persistent22              
4School of Materials and Engineering, Jiangsu University of Technology, Changzhou 213001, China, persistent22              
5Theory and Simulation, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863392              

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 Abstract: In this study, the deformation behavior of a Ti-40Al-10V (at.) alloy within β single phase field was examined by means of isothermal compression at 1300◦C under strain rates of 2 s−1, 0.2 s−1, and 0.02 s−1, as well as its effect on the subsequent β→α transformation. The results showed that the alloy behaved steady-state flow with dislocation creep as the predominant rate-controlling process. Dynamic recrystallization (DRX) evidently occurred during deformation, and its volume fraction was dramatically increased so that at the lowest strain rate (0.02 s−1), a full-DRX β structure was obtained. The preferentially dynamic migration of grain boundaries with lt;100gt; orientation was demonstrated to be the major DRX mechanism. The texture was characterized by a lt;100gt; + lt;111gt; double-fiber at 2 s−1, but gradually transformed into a simple rotated cube orientationunder 0.02 s−1, accompanied by a decreasing texture intensity. During the subsequent β→α transformation, two types of α morphology wereproduced with evident variant selection, namely, the Widmannstatten colony and martensitic laths. Texture simulation revealed that the α texture was solely determined by parent β texture, despite of the variant selections. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.

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Language(s): eng - English
 Dates: 2018-08-03
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.3390/met8080605
BibTex Citekey: Chen2018
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Title: Metals
Source Genre: Journal
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Publ. Info: Basel : MDPI AG
Pages: - Volume / Issue: 8 (8) Sequence Number: 605 Start / End Page: - Identifier: Other: 2075-4701
CoNE: https://pure.mpg.de/cone/journals/resource/metals