Damage buildup and edge dislocation mobility in equiatomic multicomponent alloys

Granberg, Fredric; Djurabekova, Flyura; Levo, Emil; Nordlund, K.

doi:10.1016/j.nimb.2016.11.012

Cited by 24 publications

(22 citation statements)

References 18 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In both the small and large simulation cells, we observe in the beginning that 180 the number of defects is higher in the more complex alloys, compared to Ni and NiCo [13]. This is seen as a faster accumulation of defects in NiFe, NiCoFe and the material order, were seen in both cell sizes.…”

Section: Resultsmentioning

confidence: 75%

“…The experimental work demonstrated, and the simulations indicated, a clear difference between the two alloys, where NiCoCr showed an even larger 25 reduction in accumulated defects [5]. The previous investigations proved that the dislocation mobility clearly differs for the different materials, where Ni has the highest and NiCoCr the lowest [5,13]. The lower dislocation mobility in the more complex alloys prevents a rapid formation of large dislocation structures, M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT leading to a smaller amount of prevailing defects.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the same HEA's have proven to have improved fatigue, fracture resistance, ductility and strength [3,10,9]. Studies have also shown that the EAMC alloys have a reduced defect accumulation when exposed to continuous irradiation [5,11,12] and that one contributing factor for this 20 phenomenon was reduced dislocation mobility [5,13]. Both the experimental and simulation efforts showed that NiFe and NiCoCr have a tendency of less accumulating defects in massively overlapping cascades [5] compared to elemental Ni.…”

Section: Introductionmentioning

confidence: 99%

“…To enable a systematic study of all five materials, we ran the simulations for the previous system [5] with the new alloys. We analyzed 50 the mobility of edge dislocations in NiCo and NiCoFe, and compared it to the previous results [13].…”

Section: Introductionmentioning

confidence: 99%

“…The edge dislocation mobility in NiCo and NiCoFe was obtained following exactly the same method as in Ref. 13, where the edge dislocation mobility in Ni, NiFe and NiCoCr is described. 105 …”

mentioning

confidence: 99%

See 4 more Smart Citations

Radiation damage buildup and dislocation evolution in Ni and equiatomic multicomponent Ni-based alloys

Levo

Granberg

Fridlund

et al. 2017

Journal of Nuclear Materials

Self Cite

View full text Add to dashboard Cite

Single-phase multicomponent alloys of equal atomic concentrations ("equiatomic") have proven to exhibit promising mechanical and corrosion resistance properties, that are sought after in materials intended for use in hazardous environments like next-generation nuclear reactors. In this article, we investigate the damage production and dislocation mobility by simulating irradiation of elemental Ni and the alloys NiCo, NiCoCr, NiCoFe and NiFe, to assess the effect of elemental composition. We compare the defect production and the evolution of dislocation networks in the simulation cells of two different sizes, for all five studied alloys. We find that the trends in defect evolution are in good agreement between the different cell sizes. The damage is generally reduced with increased alloy complexity, and the dislocation evolution is specific to each material, depending on its complexity. We show that increasing complexity of the alloys does not always lead to decreased susceptibility to damage accumulation under irradiation. We show that, for instance, NiCo alloy behaves very similarly to Ni, while presence of Fe or Cr in the alloy even as a third component reduces the saturated level of damage substantially. Moreover, we linked the defect evolution with the dislocation transformations in the alloys. Sudden drops in defect number and large defect fluctuations from the continuous irradiation can be explained from the dislocation activity.

show abstract

Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Radiation damage buildup and dislocation evolution in Ni and equiatomic multicomponent Ni-based alloys

Levo

Granberg

Fridlund

et al. 2017

Journal of Nuclear Materials

Self Cite

View full text Add to dashboard Cite

show abstract

Molecular Dynamics Simulations of Displacement Cascade in Ni-Based Concentrated Solid Solution Alloys

Zhao,

Xie,

et al. 2024

Acta Mech. Solida Sin.

View full text Add to dashboard Cite

Irradiation Resistance of CoCrCuFeNi High Entropy Alloy under Successive Bombardment

Guo

Liu

et al. 2023

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

With the excellent irradiation resistance due to the chemical complexity, high entropy alloys have attracted considerable attention in the design of nuclear structural materials. However, their performance under successive bombardments remains elusive. In this study, we have investigated the irradiation resistance of equiatomic CoCrCuFeNi HEA compared with Ni metal using molecular dynamics simulations. The evolution of defects such as point defects, defect clusters and dislocations after 400 times of bombardments is examined. The results show that CoCrCuFeNi has fewer point defects than Ni does. Moreover, CoCrCuFeNi has smaller interstitial clusters size, lower interstitial-type Frank partial dislocation density, shorter average interstitial-type Frank partial dislocation length and higher average vacancy formation energy. These findings suggest that CoCrCuFeNi has superior radiation resistance under successive bombardments due to its high entropy effect.

show abstract

Damage buildup and edge dislocation mobility in equiatomic multicomponent alloys

Cited by 24 publications

References 18 publications

Radiation damage buildup and dislocation evolution in Ni and equiatomic multicomponent Ni-based alloys

Radiation damage buildup and dislocation evolution in Ni and equiatomic multicomponent Ni-based alloys

Molecular Dynamics Simulations of Displacement Cascade in Ni-Based Concentrated Solid Solution Alloys

Irradiation Resistance of CoCrCuFeNi High Entropy Alloy under Successive Bombardment

Contact Info

Product

Resources

About