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Quantification of m...
Quantification of microstructure in a eutectic high entropy alloy AlCoCrFeNi2.1
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- Lozinko, Adrianna, 1992 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Mishin, Oleg V. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Yu, Tianbo (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Klement, Uta, 1962 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Guo, Sheng, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Zhang, Yubin (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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(creator_code:org_t)
- 2019
- 2019
- English.
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In: IOP Conference Series: Materials Science and Engineering. - 1757-8981 .- 1757-899X. ; 580:1
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Abstract
Subject headings
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- Eutectic high entropy alloys (EHEAs) are a new class of metallic alloys with good mechanical properties at various temperatures. In the present investigation, microstructural parameters such as the volume fraction of two phases (FCC (L12) and BCC (B2)) forming the eutectic, the orientation relationship between these phases and interphase boundary spacings in as-cast EHEA AlCoCrFeNi2.1 were quantified using electron microscopy. It is found that the two phases have a Kurdjumov-Sachs orientation relationship, i.e., {111} fcc || {110} bcc and 〈110〉 fcc || 〈111〉 bcc . It is also found that both regular semi-coherent lamellar and irregular curved interphase boundaries are present within individual eutectic colonies. The habit planes for the semi-coherent lamellar interfaces are {224} and {123} for the FCC and BCC phases, respectively. Quantitative microstructural analysis shows that the ratio of volume fractions of the FCC and BCC phases within the regular lamellar regions differs to that within irregular regions, which suggests a local chemistry difference between the two regions. Finally, the solidification process of EHEAs is discussed, and possible ways to optimize the mechanical properties by microstructural design are suggested.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Publication and Content Type
- kon (subject category)
- ref (subject category)
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