High Temperature Oxidation Behavior of SIMP Steel

Shi, Quanqiang; Liu, Jian; Wang, Wei; Yan, Wei; Shan, Yiyin; Yang, Ke

doi:10.1007/s11085-015-9532-9

Cited by 22 publications

(8 citation statements)

References 36 publications

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“…According to the distribution of Si element, it can be concluded that Cu element can promote the diffusion of Si element, thus forming SiO2 oxide to increase the compactness of the inner layer Cr2O3 oxide film. With the continuous oxidation process, the iron ions in the matrix continue to diffuse outward to form the double oxide film whose main content is Fe2O3 [37], while the outward diffusion of iron ions caused the formation of vacancies. Finally a crack was formed.…”

Section: Discussionmentioning

confidence: 99%

Properties of High Temperature Oxidation of Heat-resistant Steel with Aluminium and Copper

Li¹,

Zhao²,

Yan³

et al. 2019

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The research is focused on a novel aluminum and copper-containing heat-resistant steel. The steel was designed by the material performance simulation software JmatPro, performed high-temperature oxidation tests at 650 °C and 700 °C atmospheric conditions, and analyzed the high-temperature oxidation processes and its mechanisms.The phase transtions and surface morphology of the oxide films were studied using X-ray diffraction (XRD), electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the equilibrium phase of the test steel is composed of γ phase and δ phase at 1050 °C and tranforms to tempered martensite and δ-Fe mixed structure after heat treatment. The preferential oxidation of Fe and Cr and the internal oxidation of Al occurred during the high temperature oxidation of the test steel. The oxide films were formed with various shape and weak bonding properties after high-temperature oxidation at 650℃. To the contrary, the oxide films more regular and evenly distributed, and has a certain protective effect after high-temperature oxidation at 700 ℃. The oxide films were divided into two layers, Fe2O3 is main element in the outer layer, the inner layer is mainly consisting the oxide of Cr. However, the addition of Cu element can promote the diffusion of Al and Si elements, which is beneficial to the formation of Al2O3 and SiO2 protective oxide films and excellent in high temperature oxidation resistance.

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Section: Discussionmentioning

confidence: 99%

Properties of High Temperature Oxidation of Heat-resistant Steel with Aluminium and Copper

Li¹,

Zhao²,

Yan³

et al. 2019

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“…To solve the problem of computing a large number of particles in a DEM simulation, a heterogeneous CPU-GPU algorithm with a message passing interface (MPI) and CUDA have been developed to simulate hundreds of millions of particles in a DGT [27,28] (See details in our previous work [29] and the flowchart in Figure 8(a)) In Figure 8(b), we present the efficient applicability of GPUs to simulate the dense granular flow in the DGT. In such simulations, each W particle is accurately modeled as a monosized sphere undergoing realistic frictional interactions with neighboring particles.…”

Section: Granular Simulationmentioning

confidence: 99%

New concept for ADS spallation target: Gravity-driven dense granular flow target

Yang

Wenlong

2015

Sci. China Technol. Sci.

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For the Chinese-ADS project, to provide enough neutrons to drive the subcritical system, tens of MW spallation targets for the C-ADS are necessary. This is not an easy task. Here we propose a new concept for a gravity-driven dense granular flow target, in which heavy metal grains are chosen as the spallation target material. Compared with currently widely used targets, this conceptual design has advantages with regard to heat removal, thermal shock protection, neutron yield, radiotoxicity reduction, and convenient operation. The gravity-driven dense granular flow target has the potential to easily deal with these issues and to form a foundation for tens of MW spallation targets for cost-effective facilities. Preliminary simulations and experiments have been completed to support this conceptual design.accelerator driven system, spallation target, dense granular flow

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“…The minimization of nuclear waste is the key factor to the sustainable development of fission powers. Recently, a new type of nuclear reactor, accelerator-driven system (ADS), which is a promising concept for future high-level radioactive waste reduction and destruction of the long-lasting actinides resulted from the fission reactors by transmutation, is one of the most promising alternatives to solve this problem and has received high attention [1]. The reduced activation ferritic/martensitic (RAFM) steel, which has better thermal conductivity, lower thermal expansion coefficient and much better resistance to swelling than austenitic steels, has been considered as a promising candidate structure material for both the first wall and the spallation target applications in ADS [2].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior of a New Nuclear Use Reduced Activation Ferritic/Martensitic Steel

Liu

Zhao

Unenbayar

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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The hot deformation behavior and workability of a new reduced activation ferritic/martensitic steel named SIMP steel for accelerator-driven system were studied. The flow curve and its microstructure were studied at 900-1200°C and strain rate range of 0.001-10 s-1. The results showed that the deformation behavior of the SIMP steel during hot compression could be manifested by the Zener-Hollomon parameter in an exponent-type equation. Based on the obtained constitutive equation, the calculated flow stresses were in agreement with the experimentally measured ones, and the average activity energies Q DRV and Q HW for the initiation of dynamic recrystallization and the peak strain were calculated to be 476.1 kJ/mol and 462.7 kJ/mol, respectively. Furthermore, based on the processing maps and microstructure evolution, the optimum processing condition for the SIMP steel was determined to be 1050-1200°C/0.001-0.1 s-1 .

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High Temperature Oxidation Behavior of SIMP Steel

Cited by 22 publications

References 36 publications

Properties of High Temperature Oxidation of Heat-resistant Steel with Aluminium and Copper

Properties of High Temperature Oxidation of Heat-resistant Steel with Aluminium and Copper

New concept for ADS spallation target: Gravity-driven dense granular flow target

Hot Deformation Behavior of a New Nuclear Use Reduced Activation Ferritic/Martensitic Steel

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