Silicon enhances high temperature oxidation resistance of SIMP steel at 700 °C

Zhang, Lingling; Yan, Wei; Shi, Quanqiang; Li, Yanfen; Shan, Yiyin; Yang, Ke

doi:10.1016/j.corsci.2020.108519

Cited by 60 publications

(10 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Up to now, a lot of studies have been performed on 9Cr-F/M steels, including the influence of different normalizing and tempering processes on the mechanical properties [ 16 ], microstructure evolution at high temperatures [ 17 , 18 ], creep behavior under various aging conditions [ 19 , 20 ], the effect of alloying elements [ 13 , 21 , 22 ], and many other properties [ 23 , 24 , 25 ]. Nevertheless, limited studies on the microstructure changes of the sample surface and cross section under different stress states of 9Cr-F/M steel were carried out.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Tensile Properties of 9Cr-F/M Steel at Elevated Temperatures

et al. 2022

View full text Add to dashboard Cite

Tensile properties and microstructure changes under different stress states of tempered 9Cr-F/M steel were characterized using a transmission electron microscope (TEM), electron backscatter diffraction (EBSD), scanning electron microscopy (SEM), Vickers hardness tester, and tensile tester. This tempered steel has a typical lath martensite structure with only a few polygonal ferrites embedded, and M23C6 and MX phases nucleated on the lath boundaries or within the sub-grains. At elevated temperatures, the strength of the steel decreases. However, the elongation at 400 °C is lower than that at room temperature. For the necking zone, tensile deformation made the grain elongated to the direction of applied stress and thus the grain’s cross-section becomes smaller. For samples with rectangular working area cross-section, the deformation in the TD direction was more severe than that in the ND direction, which made the grain elongated in the TD direction. These results can provide some guidance for composition optimization of the 9Cr-F/M steel and facilitate a better understanding of the fracture mechanism under different stress states.

show abstract

Section: Introductionmentioning

confidence: 99%

Microstructures and Tensile Properties of 9Cr-F/M Steel at Elevated Temperatures

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Si-REE alloys are important deoxidants and alloying agents in many industrial fields because both Si and REEs have a strong affinity for oxygen and can improve the properties of steel and Si-containing alloy materials. For example, the addition of REEs can increase corrosion resistance and refine the microstructure of Al–Si alloys; Si can enhance the high-temperature oxidation resistance of SIMP steel, and the addition of Si and Sc can refine the microstructure and improve the creep resistance of Ti–6Al–4V alloys . The addition of Ce can refine the microstructure and improve the tensile ductility of Fe-6.5 wt % Si alloy; REEs can contribute to microstructure dispersity and modify the morphology of the metallic and silicide phases in the Mo–Si alloy .…”

Section: Introductionmentioning

confidence: 99%

Novel Approach for the Simultaneous Recovery of Nd from Nd₂O₃-Containing Slag and the Preparation of High-Purity Si

Lei

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The extraction of rare earth elements (REEs) from rare earth oxide slag is a major challenge of recycling REEs from REE-containing wastes using pyrometallurgical approaches, especially the recycling of Nd from spent NdFeB permanent magnets. In this study, a novel and effective approach is proposed for extracting Nd from Nd 2 O 3 -containing slag. First, low-purity Si (99.2%) was used as a reductant to extract Nd from Nd 2 O 3containing slag to prepare a bulk Si−Nd alloy. The bulk Si−Nd alloy represents one of the final products and achieves the purpose of Nd recycling because of its wide applications; alternatively, the bulk Si−Nd alloy can be further separated into Si powder and Ndcontaining HCl solution by HCl acid leaching. Thereafter, three methods can be used to recover Nd from the Nd-containing HCl solution: (1) NH 3 •H 2 O can be used to precipitate Nd 3+ as NdOCl hydrate sediment, which is roasted to obtain high-purity NdOCl (99.0%); (2) HF can be used to precipitate Nd 3+ as NdF 3 (97.0%); or (3) NdCl 3 •6H 2 O (98.1%) can be obtained after completely distilling the Nd-containing HCl solution. This new technology not only permits the recovery of Nd from the Nd 2 O 3 -containing slag but also increases the purity of Si from 99.2 to 99.997%.

show abstract

“…Due to its a low melting point, low vapor pressure, high atomic number and high thermal conductivity, lead-bismuth eutectic (LBE) is considered the primary candidate material used in spallation target and coolant. One of the serious problems using LBE is that containment materials, such as ferritic-martensitic (FM) steels, suffer from LBE corrosion [ 2 , 3 ]. Oxidation, dissolved corrosion and liquid metal embrittlement possible occur when FM steels contact with LBE.…”

Section: Introductionmentioning

confidence: 99%

Comparison between Subsequent Irradiation and Co-Irradiation into SIMP Steel

et al. 2021

View full text Add to dashboard Cite

A modern Chinese ferritic/martensitic steel SIMP, is a new perspective nuclear structural material for the spallation target in accelerator driven sub-critical system. In this work, aimed at exploring the radiation resistance properties of this material, we investigate the differences between simultaneous Fe and He ions irradiation and He implantation of SIMP steel pre-irradiated by Fe self-ions. The irradiations were performed at 300 °C. The radiation-induced hardening was evaluated by nano-indentation, while the lattice disorder was investigated by transmission electron microscopy. Clear differences were found in the material microstructure after the two kinds of the ion irradiation performed. Helium cavities were observed in the co-irradiated SIMP steel, but not the case of He implantation with Fe pre-irradiation. In the same time, the size and density of Frank loops were different in the two different irradiation conditions. The reason for the different observed lattice disorders is discussed.

show abstract

Silicon enhances high temperature oxidation resistance of SIMP steel at 700 °C

Cited by 60 publications

References 33 publications

Microstructures and Tensile Properties of 9Cr-F/M Steel at Elevated Temperatures

Microstructures and Tensile Properties of 9Cr-F/M Steel at Elevated Temperatures

Novel Approach for the Simultaneous Recovery of Nd from Nd₂O₃-Containing Slag and the Preparation of High-Purity Si

Comparison between Subsequent Irradiation and Co-Irradiation into SIMP Steel

Contact Info

Product

Resources

About

Silicon enhances high temperature oxidation resistance of SIMP steel at 700 °C

Cited by 60 publications

References 33 publications

Microstructures and Tensile Properties of 9Cr-F/M Steel at Elevated Temperatures

Microstructures and Tensile Properties of 9Cr-F/M Steel at Elevated Temperatures

Novel Approach for the Simultaneous Recovery of Nd from Nd2O3-Containing Slag and the Preparation of High-Purity Si

Comparison between Subsequent Irradiation and Co-Irradiation into SIMP Steel

Contact Info

Product

Resources

About

Silicon enhances high temperature oxidation resistance of SIMP steel at 700 °C

Novel Approach for the Simultaneous Recovery of Nd from Nd₂O₃-Containing Slag and the Preparation of High-Purity Si