The Effect of Heating Temperature on α-α′ Miscibility and Separation in Fe-25Cr-5Al-RE Alloy

In general, FeCrAl alloys are faced with the separation of the high-chromium solid solution into α and α′ phases. For the Fe-25Cr-5Al-RE alloy, it is imperative to investigate the structure and morphology and their effect on the alloy’s mechanical properties. In this paper, XRD is used to reveal the...

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Bibliographic Details
Published inMetals (Basel ) Vol. 13; no. 3; p. 597
Main Authors Li, Taotao, Liu, Yanlian, Cheng, Shengwei, Liu, Chengzhi
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.03.2023
Subjects
Alloys
Bias
Chromium
Elongation
Fe-25Cr-5Al-RE alloy
Ferrous alloys
harmonic coefficients
Heat resistance
Lattice parameters
Mechanical properties
Miscibility
Pipe industry
Rare earth alloys
Rietveld refinement
Scanning electron microscopy
Separation
Solid solutions
Specialty metals industry
Spectrum analysis
Symmetry
Tubing industry
X-ray diffraction
α-α′ phase
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Summary:In general, FeCrAl alloys are faced with the separation of the high-chromium solid solution into α and α′ phases. For the Fe-25Cr-5Al-RE alloy, it is imperative to investigate the structure and morphology and their effect on the alloy’s mechanical properties. In this paper, XRD is used to reveal the presence of α and α′ phases. Based on XRD data, Rietveld refinement combined with quantitative texture analysis is carried out to determine the lattice constants and the harmonic coefficients. Then, SEM and TEM techniques are employed to provide an insight into the α′ phase and its morphology. The percentage total elongation at fracture is anti-correlated with the lattice of the α′ phase and the generalized harmonic coefficients C41.
ISSN:2075-4701
2075-4701
DOI:10.3390/met13030597