Effect of thermal ageing on atomic redistribution at the ferrite/ferrite and ferrite/cementite interfaces

Medouni, I.; Portavoce, A.; Maugis, Philippe; Yescas, Miguel; Roch, François; Joly, Pierre; Compos, A.; Dominici, Christian; Hoummada, K.

doi:10.1007/s10853-020-04469-x

Cited by 6 publications

(3 citation statements)

References 45 publications

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“…However, Figure 4a shows that Cr partitions preferably into ferrite, which means that Cr is not expected to be dissolved in cementite. Such behavior is not consistent with APT measurements by Medouni et al, [ 40 ] who showed that Cr tends to partition into cementite. Under such circumstances and according to Figure 2a, cementite becomes stabilized by the incorporation of Cr.…”

Section: Discussioncontrasting

confidence: 90%

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Ab Initio Study of Alloying Impact on the Stability of Cementite in Transformation‐Induced Plasticity‐Assisted Advanced Steels

et al. 2022

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Transformation‐induced plasticity (TRIP) steels from the third generation of advanced high‐strength steels (AHSS) contain Si additions to prevent the formation of carbides. Cementite (Fe3C) is a prototype among the carbides, and despite the importance of the influence of alloying elements on its stability, mechanisms by which the elements act have not been clarified so far. Herein, ab initio calculations are employed to study the impact of several alloying elements, including Al, Cr, Mg, Mn, and Si, on the stability of cementite. Partitioning energies are calculated to determine the segregation tendency of alloying elements between the phases such as ferrite, austenite, and cementite. The change in formation energy between the alloyed cementite and the pure cementite is then used to quantify the phase (de)stabilization. Therefore, both the partitioning energy and the change in formation energy must be considered together in a multiphase alloy system to make statements about the effect of alloying elements on the cementite stability are proposed. In addition, the effects of the technically most important elements Al and Si on the mechanical properties of cementite are calculated using the stress–strain method. Both the elements are found to increase the elastic stability of cementite.

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Section: Discussioncontrasting

confidence: 90%

“…This trend is consistent with APT measurements of the Mn distribution at the ferrite/cementite interface. [39,40] 4.1.5. Magnesium…”

Section: Manganesementioning

confidence: 99%

Ab Initio Study of Alloying Impact on the Stability of Cementite in Transformation‐Induced Plasticity‐Assisted Advanced Steels

et al. 2022

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“…Therefore, adding Mo and Mn hastens the precipitation of G-phase [3]. Furthermore, thermal segregation enriches Mo at grain boundaries (GBs) [4,[42][43][44], as shown in Figure 5d.…”

Section: Nano-hardness Test and Analysismentioning

confidence: 98%

Effect of Thermal Aging on the Microstructure and Mechanical Properties of ER308L/Z2CND18.12N2 Dissimilar Welds

Ju,

Liu,

Zhuo

et al. 2023

Materials

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A multi-analytical approach was used to investigate the effect of thermal aging on the microstructure and mechanical properties of ER308L/Z2CND18.12N2. The results demonstrated that fractures occurred preferentially on the ER308L side. Z2CND18.12N2 exhibited superior fracture toughness compared to ER308L regardless of thermal aging time. The ultimate tensile strength significantly increased from 564.5 MPa in the unaged condition to 592.7 MPa to MPa after thermal aging and the fracture mode changed from ductile fracture into a ductile + quasi-cleavage fracture. The fusion zone (FZ) with the chemical composition gradient was about 40 μm from the Z2CND18.12N2 to ER308L. After thermal aging, spinodal decomposition and G-phase precipitation were observed for the first time in the ferrite phase of the FZ. Moreover, the hardness presented the following trend: FZ > ER308L > Z2CND18.12N2. The hardness of the ferrite phase dramatically increased from 6.13 GPa in an unaged condition to 8.46 GPa in a 10,000 h aged condition.

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Thermal ageing effect on solute segregation and precipitation in the heat-affected-zone of dissimilar metal welds for nuclear power plants

et al. 2023

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Effect of thermal ageing on atomic redistribution at the ferrite/ferrite and ferrite/cementite interfaces

Cited by 6 publications

References 45 publications

Ab Initio Study of Alloying Impact on the Stability of Cementite in Transformation‐Induced Plasticity‐Assisted Advanced Steels

Ab Initio Study of Alloying Impact on the Stability of Cementite in Transformation‐Induced Plasticity‐Assisted Advanced Steels

Effect of Thermal Aging on the Microstructure and Mechanical Properties of ER308L/Z2CND18.12N2 Dissimilar Welds

Thermal ageing effect on solute segregation and precipitation in the heat-affected-zone of dissimilar metal welds for nuclear power plants

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