Selection of the Massive-like <i>δ</i>-<i>γ</i> Transformation due to Nucleation of Metastable <i>δ</i> Phase in Fe-18 Mass%Cr-Ni Alloys with Ni Contents of 8, 11, 14 and 20 Mass%
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- Nishimura Tomohiro
- Department of Materials Science and Engineering, Kyoto University
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- Matsubayashi Ryota
- Department of Materials Science and Engineering, Kyoto University
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- Morishita Kohei
- Department of Materials Science and Engineering, Kyoto University
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- Yoshiya Masato
- Department of Adaptive Machine Systems, Osaka University
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- Nagira Tomoya
- Joining and Welding Research Institute, Osaka University
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- Yasuda Hideyuki
- Department of Materials Science and Engineering, Kyoto University
Bibliographic Information
- Other Title
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- Erratum to “Selection of the massive-like δ-γ transformation due to nucleation of metastable 8 phase in Fe-18 Mass%Cr-Ni alloys with Ni contents of 8, 11, 14 and 20 mass%”
- Selection of the massive-like δ-γ transformation due to nucleation of metastable δ phase in Fe-18 Mass%Cr-Ni alloys with Ni contents of 8, 11, 14 and 20 mass%
Abstract
<p>It has been realized that a massive-like transformation, in which δ phase (ferrite) transformed to γ phase (austenite) in the solid state during and after solidification, was selected in Fe–C steels. X-ray radiography confirmed that the massive-like transformation also occurred in Fe-18 mass%Cr-Ni alloys with Ni contents of 8, 11, 14 and 20 mass%Ni. According to the equilibrium phase diagram, δ phase is the primary phase in 8 and 11 mass%Ni alloys while γ phase in 14 and 20 mass%Ni alloys. Solidification was always initiated by nucleation of δ phase and consequently fine γ grains were formed by the massive-like transformation in 8 and 11 mass%Ni. On the other hand, nucleation of δ phase as a metastable phase was preferably selected at lower undercoolings (<50 K) in 14 and 20 mass%Ni and consequently the massive-like transformation occurred even in 14 and 20 mass%Ni alloys. Solidification of γ phase can be triggered by nucleation of δ phase followed by the massive-like transformation in the Fe–Cr–Ni with lower Cr/Ni values (the primary γ alloys). Moreover, the present study demonstrates that the massive-like transformation will be commonly observed in Fe-based alloys, in which δ and γ phases are competitive each other from a thermodynamic perspective.</p>
Journal
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- ISIJ International
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ISIJ International 59 (3), 459-465, 2019-03-15
The Iron and Steel Institute of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282763104093440
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- NII Article ID
- 130007616035
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- ISSN
- 13475460
- 09151559
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed