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Exploring the Solidification Sequence and Solid-State Transformations in High-Boron Multi-Component Cast Alloys by Differential Scanning Calorimetry.

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Title: Exploring the Solidification Sequence and Solid-State Transformations in High-Boron Multi-Component Cast Alloys by Differential Scanning Calorimetry.
Authors: Chabak, Yuliia1,2 (AUTHOR), Golinskyi, Michail1 (AUTHOR), Podobova, Maria2 (AUTHOR), Petryshynets, Ivan2 (AUTHOR), Efremenko, Vasily1,2,3 (AUTHOR) vgefremenko@gmail.com, Zurnadzhy, Vadym1,2 (AUTHOR), Halfa, Hossam4 (AUTHOR), Efremenko, Bohdan1 (AUTHOR), Khrunyk, Yuliya5 (AUTHOR)
Source: International Journal of Metalcasting. Sep2025, Vol. 19 Issue 5, p2757-2773. 17p.
Subjects: Solidification, Solid-state phase transformations, Alloys, Heat treatment, Phase transitions, Microstructure, Differential scanning calorimetry, Tribology
Abstract: The newly designed multi-component (Fe–5 wt.% W–5 wt.% Mo–5 wt.% V–10 wt.% Cr–2.5 wt.% Ti) cast alloys, containing 0.7–1.1 wt.% C and 2.7–3.6 wt.% B, are intended for tribological applications. The present work was aimed at studying the solidification sequence and phase transformation temperature intervals of the above-mentioned alloys, in order to elucidate their structural status and further develop an appropriate heat treatment regime. For this purpose, Differential Scanning Calorimetry (DSC), microstructure observation and thermodynamic modeling were applied. Two temperature ranges of exothermic reaction (caused by the release of latent heat during transformation) were revealed at 1200-1091 °C and ≤400 °C. The first range was caused by the primary carboboride (M(C,B), M2(B,C)5) precipitation, followed by sequential eutectic reactions with the formation of carboborides M2(B,C)5, M7(C,B)3, and M3(C,B). The temperature ranges of eutectic transformations decreased with the increase in carbon and boron contents. Low-temperature exothermic reactions (at 399-181 °C) referred to the transformation of austenite into bainite or martensite. The values of the latent heat of the transformations were calculated and discussed. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Metalcasting 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: Exploring the Solidification Sequence and Solid-State Transformations in High-Boron Multi-Component Cast Alloys by Differential Scanning Calorimetry.
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  Data: The newly designed multi-component (Fe–5 wt.% W–5 wt.% Mo–5 wt.% V–10 wt.% Cr–2.5 wt.% Ti) cast alloys, containing 0.7–1.1 wt.% C and 2.7–3.6 wt.% B, are intended for tribological applications. The present work was aimed at studying the solidification sequence and phase transformation temperature intervals of the above-mentioned alloys, in order to elucidate their structural status and further develop an appropriate heat treatment regime. For this purpose, Differential Scanning Calorimetry (DSC), microstructure observation and thermodynamic modeling were applied. Two temperature ranges of exothermic reaction (caused by the release of latent heat during transformation) were revealed at 1200-1091 °C and ≤400 °C. The first range was caused by the primary carboboride (M(C,B), M2(B,C)5) precipitation, followed by sequential eutectic reactions with the formation of carboborides M2(B,C)5, M7(C,B)3, and M3(C,B). The temperature ranges of eutectic transformations decreased with the increase in carbon and boron contents. Low-temperature exothermic reactions (at 399-181 °C) referred to the transformation of austenite into bainite or martensite. The values of the latent heat of the transformations were calculated and discussed. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of International Journal of Metalcasting 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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        Value: 10.1007/s40962-024-01495-2
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        Text: English
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        PageCount: 17
        StartPage: 2757
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      – SubjectFull: Solidification
        Type: general
      – SubjectFull: Solid-state phase transformations
        Type: general
      – SubjectFull: Alloys
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      – SubjectFull: Heat treatment
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      – SubjectFull: Phase transitions
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      – SubjectFull: Microstructure
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      – SubjectFull: Differential scanning calorimetry
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      – SubjectFull: Tribology
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      – TitleFull: Exploring the Solidification Sequence and Solid-State Transformations in High-Boron Multi-Component Cast Alloys by Differential Scanning Calorimetry.
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              M: 09
              Text: Sep2025
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