A study of the effect of Mn on the precipitation and phase transition of nanoscale Cu-rich phase in Fe–Cu alloys by phase-field method
In this study, the influence of Mn content on the precipitation and structural phase transition of the Cu-rich phase in Fe–Cu–Mn alloy at 773 K was simulated by a phase-field model. The results showed that, in the early stage of the precipitation, Mn and Cu atoms were first congregated to form Mn–Cu...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001528 |
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| Summary: | In this study, the influence of Mn content on the precipitation and structural phase transition of the Cu-rich phase in Fe–Cu–Mn alloy at 773 K was simulated by a phase-field model. The results showed that, in the early stage of the precipitation, Mn and Cu atoms were first congregated to form Mn–Cu co-clusters, followed by Mn atoms separating from the co-clusters to segregate at the cluster-matrix interface to form a Cu-rich core and Mn-rich shell structure once the Cu content in the co-clusters reached 85%. The increase in Mn content in the alloy promoted the nucleation of the Cu-rich phase, resulting in an increase in the number density and volume fraction of the Cu-rich precipitates, while inhibiting the growth and coarsening of the Cu-rich phase. Furthermore, as the Mn content increases, the incubation time required for α-Cu phase to transform into the 9R phase was increased, while the critical radius for the transformation of α-Cu precipitates into 9R phase was decreased. |
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| ISSN: | 2238-7854 |