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Influence of High-Temperature Exposure on the Microstructure of ATI 718Plus Superalloy Studied by Electron Microscopy and Tomography Techniques.

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Title: Influence of High-Temperature Exposure on the Microstructure of ATI 718Plus Superalloy Studied by Electron Microscopy and Tomography Techniques.
Authors: Lech, Sebastian1 (AUTHOR) slech@agh.edu.pl, Kruk, Adam1 (AUTHOR), Cempura, Grzegorz1 (AUTHOR), Gruszczyński, Adam1 (AUTHOR), Gil, Aleksander2 (AUTHOR), Agüero, Alina3 (AUTHOR), Wusatowska-Sarnek, Agnieszka M.4 (AUTHOR), Czyrska-Filemonowicz, Aleksandra1 (AUTHOR)
Source: Journal of Materials Engineering & Performance. Mar2020, Vol. 29 Issue 3, p1453-1459. 7p.
Subjects: Electron microscope techniques, Three-dimensional imaging, Heat resistant alloys, Microstructure, Crystal grain boundaries, Nickel alloys
Abstract: The changes in ATI® 718Plus™ (718Plus) superalloy microstructure after high-temperature long-term exposure (850 °C/4000 h/air) were characterized by two- and three-dimensional imaging techniques. The 718Plus microstructure consists of a γ-matrix strengthened by coherent γ′-phase and plate-like η-phase at grain boundaries. The η-phase analysis showed the presence of δ-phase stacking faults within it, along with fluctuations of chemical composition within these defects. Applied thermal exposure resulted in an increased amount of δ-, η-phases and formation of topologically close-packed phases. One of them was identified by electron diffraction as trigonal μ-phase. However, the difference in size and morphology revealed via tomographic reconstruction indicates that the formation of other topologically close-packed phases is possible. The μ-phase was enriched in Mo, Co, Fe and Cr, which causes their depletion in the γ-matrix and may detrimentally affect the superalloy mechanical properties. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Engineering & Performance is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Influence of High-Temperature Exposure on the Microstructure of ATI 718Plus Superalloy Studied by Electron Microscopy and Tomography Techniques.
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  Data: <searchLink fieldCode="AR" term="%22Lech%2C+Sebastian%22">Lech, Sebastian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> slech@agh.edu.pl</i><br /><searchLink fieldCode="AR" term="%22Kruk%2C+Adam%22">Kruk, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cempura%2C+Grzegorz%22">Cempura, Grzegorz</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gruszczyński%2C+Adam%22">Gruszczyński, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gil%2C+Aleksander%22">Gil, Aleksander</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Agüero%2C+Alina%22">Agüero, Alina</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wusatowska-Sarnek%2C+Agnieszka+M%2E%22">Wusatowska-Sarnek, Agnieszka M.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Czyrska-Filemonowicz%2C+Aleksandra%22">Czyrska-Filemonowicz, Aleksandra</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Engineering+%26+Performance%22">Journal of Materials Engineering & Performance</searchLink>. Mar2020, Vol. 29 Issue 3, p1453-1459. 7p.
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  Data: The changes in ATI® 718Plus™ (718Plus) superalloy microstructure after high-temperature long-term exposure (850 °C/4000 h/air) were characterized by two- and three-dimensional imaging techniques. The 718Plus microstructure consists of a γ-matrix strengthened by coherent γ′-phase and plate-like η-phase at grain boundaries. The η-phase analysis showed the presence of δ-phase stacking faults within it, along with fluctuations of chemical composition within these defects. Applied thermal exposure resulted in an increased amount of δ-, η-phases and formation of topologically close-packed phases. One of them was identified by electron diffraction as trigonal μ-phase. However, the difference in size and morphology revealed via tomographic reconstruction indicates that the formation of other topologically close-packed phases is possible. The μ-phase was enriched in Mo, Co, Fe and Cr, which causes their depletion in the γ-matrix and may detrimentally affect the superalloy mechanical properties. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of Materials Engineering & Performance is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Crystal grain boundaries
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              Text: Mar2020
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