Theoretical models for irradiation hardening and embrittlement in nuclear structural materials: a review and perspective

Xiao, Xiazi; Terentyev, D.; Chu, Hongling; Duan, Huiling

doi:10.1007/s10409-020-00931-w

Cited by 18 publications

(3 citation statements)

References 95 publications

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“…In the present experimental study, we have focused on the nanoindentation of ion-irradiated GaN samples at room temperature. Future work will be aimed at evaluating the effects of neutron- and ion-irradiation damage as well as high temperatures on the mechanical properties of III–V and nitride semiconductors using more sophisticated experimental techniques [ 38 ] and theoretical modeling [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of GaN Single Crystals upon C Ion Irradiation: Nanoindentation Analysis

et al. 2022

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Mechanical properties of gallium nitride (GaN) single crystals upon carbon ion irradiation are examined using nanoindentation analysis at room temperature. Pop-in events in the load-depth curves are observed for unirradiated and irradiated GaN samples. A statistical linear relationship between the critical indentation load for the occurrence of the pop-in event and the associated displacement jump is exhibited. Both the slope of linear regression and the measured hardness increase monotonically to the ion fluence, which can be described by logistic equations. Moreover, a linear relationship between the regression slope as a micromechanical characterization and the hardness as a macroscopic mechanical property is constructed. It is also found that the maximum resolved shear stress of the irradiated samples is larger than that of the unirradiated samples, as the dislocation loops are pinned by the irradiation-induced defects. Our results indicate that the nanoindentation pop-in phenomenon combined with a statistical analysis can serve as a characterization method for the mechanical properties of ion-irradiated materials.

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Section: Resultsmentioning

confidence: 99%

Mechanical Properties of GaN Single Crystals upon C Ion Irradiation: Nanoindentation Analysis

et al. 2022

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“…where k 1 and k 2 designate parameters determining the multiplication and annihilation of dislocations, respectively. Besides the strengthening mechanisms mentioned above, irradiation-induced defects interact with the moving dislocation, contributing an important part to the hardening effect [50][51][52]. For irradiated AustSSs, it is established that the main defects are dislocation loops.…”

Section: Constitutive Equations Of Crystalline Materials With Irradia...mentioning

confidence: 99%

Model for deformation-induced martensitic transformation in irradiated materials

et al. 2023

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Deformation-induced martensitic transformation (DIMT) is commonly reported to be easily activated in irradiated materials, but the existing transformation kinetics models of DIMT hardly capture the irradiation effect. In this work, we develop a transformation kinetics model considering the effect of irradiation hardening, shear band evolution and the role of irradiation-induced voids. A crystal plasticity framework incorporating the newly developed transformation kinetics model is established. We show that the framework is capable of capturing the accelerated evolution of martensite volume fraction in both cases with and without irradiation-induced voids. Moreover, the framework successfully simulates two post-irradiation phenomena observed in experiments, i.e. the localized distribution of martensite fraction and the evolution of the dominant transformation pathway. The present work is one of the first attempts at the theoretical modelling of DIMT in irradiated materials, and has the potential to benefit the application of irradiation in tailoring the martensitic transformation behaviour.

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“…Nuclear systems are often exposed to extreme loading conditions (stress, high temperatures, corrosion and radiation), and reliable manufacturing techniques are vital to ensure safety [68]. In particular, radiation effects can cause hardening and embrittlement of metallic crystalline structures [69] which slowly degrade their effectiveness over time. Enhanced manufacturing techniques will facilitate improved control of the microstructure of thin-walled cooling pipes, which is often a strength limiting factor in these components.…”

Section: Future Directions and Uses For Thin-walled Pipesmentioning

confidence: 99%

Manufacturing technologies and joining methods of metallic thin-walled pipes for use in high pressure cooling systems

McNair

Shokrani

Carnevale

et al. 2021

Int J Adv Manuf Technol

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Small diameter thin-walled pipes, typically with a diameter less than 20 mm and a ratio of outer diameter to wall thickness is 20 or above, have increasingly become a key value adding factor for a number of industries including medical applications, electronics and chemical industries. In high-energy physics experiments, thin-walled pipes are needed in tracking detector cooling systems where the mass of all components needs to be minimised for physics measurement reasons. The pipework must reliably withstand the cooling fluid operation pressures (of up to 100 bar), but must also be able to be reliably and easily joined within the cooling system. Suitable standard and/or commercial solutions combining the needed low mass and reliable high-pressure operation are poorly available. The following review of literature compares the various techniques that exist for the manufacture and joining of thin-walled pipes, both well-established techniques and novel methods which have potential to increase the use of thin-walled pipes within industrial cooling systems. Gaps in knowledge have been identified, along with further research directions. Operational challenges and key considerations which have to be identified when designing a system which uses thin-walled pipes are also discussed.

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Theoretical models for irradiation hardening and embrittlement in nuclear structural materials: a review and perspective

Cited by 18 publications

References 95 publications

Mechanical Properties of GaN Single Crystals upon C Ion Irradiation: Nanoindentation Analysis

Mechanical Properties of GaN Single Crystals upon C Ion Irradiation: Nanoindentation Analysis

Model for deformation-induced martensitic transformation in irradiated materials

Manufacturing technologies and joining methods of metallic thin-walled pipes for use in high pressure cooling systems

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