Effect of α–α′ phase separation on notch impact behavior of oxide dispersion strengthened (ODS) Fe20Cr5Al alloy

Chao, Jesús; Capdevila, Carlos; Serrano, Marta; García-Junceda, Andrea; Jiménez, José Antonio; Miller, M.K.

doi:10.1016/j.matdes.2013.08.007

Cited by 41 publications

(6 citation statements)

References 38 publications

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“…Fe-Cr-Al alloys have good corrosion resistance, radiation resistance, and mechanical strength, and they are being developed as structural materials for the next generation of nuclear reactors, such as fusion reactors, sodium fast reactors, lead-cooled fast reactors, and supercritical water reactors [1][2][3][4][5]. Also, because of the comprehensive performance of Fe-Cr-Al alloys in steam environments, these alloys are under consideration for accident-tolerant fuel-cladding applications [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Phase-Field Simulation of Composition Partition and Separation Kinetics of Nanoscale Phase in Fe-Cr-Al Alloy

Chen

Shi

et al. 2019

Journal of Nanomaterials

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Phase separation of the Cr-enriched nanoscale α′ phase in the Fe-38 at.% Cr-10 at.% Al alloy is studied by utilizing phase-field simulation. The partition of elements in the α and α′ phases is clarified with the composition evolution through the α/α′ phase interface, and the separation kinetics is quantitatively investigated by the temporal evolution of the size and volume fraction of the α′ phase. Aluminum partitions into the Fe-enriched α phase and depletes in the α′ phase, and the partition coefficient decreases as the temperature changes from 720 K to 760 K for the steady-state coarsening stage. As the temperature increases, the initial change rate of the volume fraction of the α′ phase is faster, indicating an accelerated phase separation. At the coarsening stage, the average particle distance and coarsening rate constant of the α′ phase increase with increased temperature, and the ratio of the Ostwald ripening is dominating compared with coalescence coarsening. The element partition and kinetics evolution of the α′ phase with temperature are helpful for the morphology and property predication of nanoscale precipitates.

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Section: Introductionmentioning

confidence: 99%

Quantitative Phase-Field Simulation of Composition Partition and Separation Kinetics of Nanoscale Phase in Fe-Cr-Al Alloy

Chen

Shi

et al. 2019

Journal of Nanomaterials

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“…The outstanding material performance stems from their unique microstructure: the highly stable nano-sized oxide particles [9,10]. It was reported that high content of chromium (>13%) in the ODS alloys is effective to suppress corrosion [11,12], while the high chromium content (>14%) can result in a thermal aging embrittlement [13,14]. Some researchers have reported the effectiveness of Al addition in ODS ferritic alloys for the improvement of corrosion resistance in Lead-cooled fast reactor (LFR) and supercritical water reactor (SCWR) [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

The comparison of microstructures and mechanical properties between 14Cr-Al and 14Cr-Ti ferritic ODS alloys

Zhang

Zhou

et al. 2016

Materials & Design

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In this study, two kinds of 14Cr ODS alloys (14Cr-Al and 14Cr-Ti) were investigated to reveal the different effects between Al and Ti on the microstructures and mechanical properties of 14Cr ferritic ODS alloys. The microstructure information such as grains, minor phases of these two alloys has been investigated by high-energy X-ray diffraction and transmission electron microscopy (TEM). The in situ synchrotron X-ray diffraction tensile test was applied to investigate the mechanical properties of these two alloys. The lattice strains of different phases through the entire tensile deformation process in these two alloys were analyzed to calculate their elastic stresses. From the comparison of elastic stress, the strengthening capability of Y 2 T i 2 O 7 is better than TiN in 14Cr-Ti, and the strengthening capability of YAH is much better than YAM and AlN in 14Cr-Al ODS. The dislocation densities of 14Cr-Ti and 14Cr-Al ODS alloys during tensile deformation were also examined by modified Williamson-Hall analyses of peak broadening, respectively. The different increasing speed of dislocation density with plastic deformation reveals the better strengthening effect of Y-Ti-O particles in 14Cr-Ti ODS than that of Y-Al-O particles in 14Cr-Al ODS alloy.

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“…Fe-Cr-based stainless steels are used in nuclear power plants for their good oxidation resistance, corrosion resistance, and mechanical properties [6,7]. At present, Fe-Cr-Al alloys have been developed as structural materials for nextgeneration nuclear reactors, such as fusion reactors, sodium fast reactors, lead-cooled fast reactors, and supercritical water reactors [8][9][10]. To further improve the properties of Fe-Cr-Al alloys, alloying elements were often added, for example adding Y element to improve the oxidation resistance [11], adding Mo and Nb elements to cause grain refinement and solid solution hardening to strengthen the bcc-Fe matrix [12], and adding Ti element to form a TiAlrich nanoscale precipitation to improve creep resistance [13].…”

Section: Introductionmentioning

confidence: 99%

Phase-field simulation of element distribution and kinetics evolution of Cr/Cu core-shell nanoparticles in Fe–Cr–Al–Cu alloy

Cheng

Pan

et al. 2021

Appl. Phys. A

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Nanoscale Cu clusters and α′ phase affect the hardness and brittleness of Fe-Cr-based stainless steel. The separation of Cr-enriched nanoscale α′ phase with Cu shell in Fe-Cr-Al-Cu alloys was revealed by three-dimensional phase-field simulation. The influences of Cu content and temperature on the evolution kinetics and element distribution were clarified. In the phase separation process, the Al is distributed in the matrix, Cu is first distributed in the matrix, then enriched around the Cr-enriched α′ phase, forming the nanoscale composite precipitates with Cr/Cu core-shell structure. The Cu shells have a retardant effect on the diffusion of Cr atoms, and the Cu shell becomes wider with the increased Cu content. The high Cu content delays the phase separation, growth, and coarsening kinetics of the α′ phase, while high temperature accelerates the phase separation kinetics. The influence of Cu content and temperature on the evolution of Cr/Cu core-shell nanoparticles reveals the complex nanoparticles formation and kinetics evolutions in the Fe-Cr-Al-Cu alloys.

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Effect of α–α′ phase separation on notch impact behavior of oxide dispersion strengthened (ODS) Fe20Cr5Al alloy

Cited by 41 publications

References 38 publications

Quantitative Phase-Field Simulation of Composition Partition and Separation Kinetics of Nanoscale Phase in Fe-Cr-Al Alloy

Quantitative Phase-Field Simulation of Composition Partition and Separation Kinetics of Nanoscale Phase in Fe-Cr-Al Alloy

The comparison of microstructures and mechanical properties between 14Cr-Al and 14Cr-Ti ferritic ODS alloys

Phase-field simulation of element distribution and kinetics evolution of Cr/Cu core-shell nanoparticles in Fe–Cr–Al–Cu alloy

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