Dislocation Motion Influence on Bias Factor in Binary Alloys under Irradiation

Golubov, S.I.; Ginkin, V.P.; Strokova, A.M.

doi:10.4028/www.scientific.net/msf.97-99.97

Cited by 10 publications

(4 citation statements)

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“…It was proposed in [84,85] that, for the swelling rates observed, the segregation bias factor of dislocations should be negligible compared with The conjecture about the absence of segregation profiles at moving dislocations is supported by the observations of the RIS profiles near moving grain boundaries (see e.g. [86]).…”

Section: Influence Of Solute Atmospheressupporting

confidence: 59%

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Unlimited damage accumulation in metallic materials under cascade-damage conditions

Barashev

Golubov

2009

Philosophical Magazine

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Section: Influence Of Solute Atmospheressupporting

confidence: 59%

“…Further development of these ideas in the framework of the SRT was undertaken by Golubov et al [84,85]. The main difficulty encountered was the fact that RIS takes place near all sinks of point defects, and thus affects them in a similar way and produces similar changes in sink efficiencies ( and in equation (1)).…”

Section: Influence Of Solute Atmospheresmentioning

confidence: 99%

Unlimited damage accumulation in metallic materials under cascade-damage conditions

Barashev

Golubov

2009

Philosophical Magazine

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“…It was shown (see, e.g., Golubov, 166 Golubov et al, 167 and references therein) that RIS can provide an additional mechanism of preferential absorption of mobile defects even in the framework of FP3DM, causing a 'segregation' bias, which must be different for immobile defects (e.g., voids) and mobile defects, such as dislocations. The atmospheres of solute (or transmuted) elements near voids may repel SIA clusters and, hence, assist or even solely explain the unlimited void growth.…”

Section: Limitations Of Production Bias Modelmentioning

confidence: 99%

Radiation Damage Theory

Golubov

Barashev

Stoller

2012

Comprehensive Nuclear Materials

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“…Thus, if the dependence of the dislocation bias factor on the climb velocity is neglected, the effective bias would be equal to the dislocation bias factor. It was proposed in [84,85] that, for the swelling rates observed, the segregation bias factor of dislocations should be negligible compared with that of voids:…”

Section: Rismentioning

confidence: 99%

Unlimited Damage Accumulation in Metallic Materials Under Cascade-Damage Conditions

Barashev

Golubov²

2008

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Most experiments on neutron or heavy-ion cascade-produced irradiation of pure metals and metallic alloys demonstrate unlimited void growth as well as development of the dislocation structure. In contrast, the theory of radiation damage predicts saturation of void swelling at sufficiently high irradiation doses and, accordingly, termination of accumulation of interstitial-type defects. It is shown in the present paper that, under conditions of steady production of one-dimensionally (1-D) mobile clusters of selfinterstitial atoms (SIAs) in displacement cascades, any one of the following three conditions can result in indefinite damage accumulation. First, if the fraction of SIAs generated in the clustered form is smaller than some finite value of the order of the dislocation bias factor. Second, if solute, impurity or transmuted atoms form atmospheres around voids and repel the SIA clusters. Third, if spatial correlations between voids and other defects, such as second-phase precipitates and dislocations, exist that provide shadowing of voids from the SIA clusters. The driving force for the development of such correlations is the same as for void lattice formation and is argued to be always present under cascade-damage conditions. It is emphasised that the mean-free path of 1-D migrating SIA clusters is typically at least an order of magnitude longer than the average distance between microstructural defects; hence spatial correlations on the same scale should be taken into consideration. A way of developing a predictive theory is discussed. An interpretation of the steady-state swelling rate of ~1%/dpa observed in austenitic steels is proposed

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Dislocation Motion Influence on Bias Factor in Binary Alloys under Irradiation

Cited by 10 publications

References 0 publications

Unlimited damage accumulation in metallic materials under cascade-damage conditions

Unlimited damage accumulation in metallic materials under cascade-damage conditions

Radiation Damage Theory

Unlimited Damage Accumulation in Metallic Materials Under Cascade-Damage Conditions

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