Recent progress toward development of reduced activation ferritic/martensitic steels for fusion structural applications

Kurtz, Richard J.; Alamo, A.; Lucon, Enrico; Huang, Qing; Jitsukawa, Shiro; Kimura, Akihiko; Klueh, R.L.; Odette, G.R.; Petersen, C.; Sokolov, Mikhail A.; Spätig, P.; Rensman, J.W.

doi:10.1016/j.jnucmat.2008.12.323

Cited by 118 publications

(45 citation statements)

References 44 publications

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“…Refs. [2][3][4][5]. Atoms can be kicked from their lattice sites by energetic neutrons, which leads to the formation of cascades.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulations of point defect production in cementite and Cr23C6 inclusions in α-iron: Effects of recoil energy and temperature

Henriksson

2016

AIP Advances

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The number of point defects formed in spherical cementite and Cr23C6 inclusions embedded into ferrite (α-iron) has been studied and compared against cascades in pure versions of these materials (only ferrite, Fe3C, or Cr23C6 in a cell). Recoil energies between 100 eV and 3 keV and temperatures between 400 K and 1000 K were used. The overall tendency is that the number of point defects — such as antisites, vacancy and interstitials — increases with recoil energy and temperature. The radial distributions of defects indicate that the interface between inclusions and the host tend to amplify and restrict the defect formation to the inclusions themselves, when compared to cascades in pure ferrite and pure carbide cells.

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“…Refs. [2][3][4][5]. Atoms can be kicked from their lattice sites by energetic neutrons, which leads to the formation of cascades.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulations of point defect production in cementite and Cr23C6 inclusions in α-iron: Effects of recoil energy and temperature

Henriksson

2016

AIP Advances

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“…By means of thermomechanical treatment, the body of martensitic lath generates high density dislocation, which could provide some advantageous condition for the nucleation of MX carbo-nitride, at the same time, the high density dislocation will effectively hinder the increase of MX carbo-nitride1 [6][7][8][9] . Simultaneously, the solute atoms diffusion rate along these high density dislocation pipeline is higher than else direction, and the atom Ta and V of CLAM steel easily segregates in the defective condition such as the high density dislocation, which could availably accelerate substitutional diffusion of the MX carbo-nitride forming element [8][9][10] . In the process of thermomechanical treatment, the deformation stress prompts solubility variation of the carbon and nitrogen in the original austenite, the solubility reduces by a large margin, so thermomechanical treatment can be able to induce the MX carbo-nitride to separate out in certain effectiveness [10][11] .…”

Section: Advances In Engineering Research Volume 146mentioning

confidence: 99%

“…In the process of thermomechanical treatment, the deformation stress prompts solubility variation of the carbon and nitrogen in the original austenite, the solubility reduces by a large margin, so thermomechanical treatment can be able to induce the MX carbo-nitride to separate out in certain effectiveness [10][11] . When MX carbo-nitride separates out in the condition of high density dislocation, the precipitated MX carbo-nitride takes great effect on pinning for high density dislocation, which results in high density dislocation gains multiplication in development in the process of thermomechanical treatment, and the multiplication dislocation could likewise provide a large amount of conditions for the precipitation of MX carbo-nitride, repeatedly like this, prompting the MX carbo-nitride to separate out in the high density dislocation [9][10][11][12] , making a contribution to the MX carbo-nitride to separate out inside of martensitic lath.…”

Section: Advances In Engineering Research Volume 146mentioning

confidence: 99%

Effect of the thermomechanical treatment on the microstructures of CLAM steel

Sun¹,

Zhao²,

Huang³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

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Abstract-The thermomechanical treatment test of CLAM steel is simulated by the thermal simulated test machine Gleeble3500, by means of constant temperature compression test to study the effect of the thermomechanical treatment processing on microstructure of China Low Activation Martensitic steel(CLAM steel). The results show that the thermomechanical treatment processing has a great effect on the microstructure of CLAM steel, which makes a great contribution to refine the martensitic lath, the formation of M 23 C 6 carbide and MX nano-sized carbo-nitride, leading to strengthen the CLAM steel's structure. Thus by means of the thermomechanical treatment processing to refine the microstructure of CLAM steel to improve its property is viable.

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“…Oxide dispersion strengthened (ODS) steels belong to a class of nanostructured ferritic alloys (NFA) which have been developed for high temperature application in the power industry [1][2][3]. Especially, the ferritic 14-16%Cr ODS steels are promising candidates for the usage in internal structures of nuclear reactors due to their high strength, excellent radiation, and oxidation resistance [4].…”

Section: Introductionmentioning

confidence: 99%

Fracture Resistance of 14Cr ODS Steel Exposed to a High Temperature Gas

Rozumová

Hadraba

Michalička

et al. 2017

Metals

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This paper studies the impact fracture behavior of the 14%Cr Oxide Dispersion Strengthened (ODS) steel (ODM401) after high temperature exposures in helium and air in comparison to the as-received state. A steel bar was produced by mechanical alloying and hot-extrusion at 1150 • C. Further, it was cut into small specimens, which were consequently exposed to air or 99.9% helium in a furnace at 720 • C for 500 h. Impact energy transition curves are shifted towards higher temperatures after the gas exposures. The transition temperatures of the exposed states significantly increase in comparison to the as-received steel by about 40 • C in He and 60 • C in the air. Differences are discussed in terms of microstructure, surface and subsurface Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) observations. The embrittlement was explained as temperature and environmental effects resulting in a decrease of dislocation level, slight change of the particle composition and interface/grain boundary segregations, which consequently affected the nucleation of voids leading to the ductile fracture.

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Recent progress toward development of reduced activation ferritic/martensitic steels for fusion structural applications

Cited by 118 publications

References 44 publications

Molecular dynamics simulations of point defect production in cementite and Cr23C6 inclusions in α-iron: Effects of recoil energy and temperature

Molecular dynamics simulations of point defect production in cementite and Cr23C6 inclusions in α-iron: Effects of recoil energy and temperature

Effect of the thermomechanical treatment on the microstructures of CLAM steel

Fracture Resistance of 14Cr ODS Steel Exposed to a High Temperature Gas

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