Columnar to Equiaxed Transition during Directionally Solidifying GCr18Mo Steel Affected by Thermoelectric Magnetic Force under an Axial Static Magnetic Field

Hou, Yuan; Ren, Zhongming; Zhang, Zhenqiang; Ren, Xiaohui

doi:10.2355/isijinternational.isijint-2018-449

Cited by 7 publications

(3 citation statements)

References 37 publications

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“…e numerical simulation results were compared with the model test results, focusing on the bending moment distribution of the rear foundation pile of the bridge and the displacement field distribution of the landslide, bridge foundation, and antislide pile system, so as to verify the applicability and accuracy of the numerical simulation results. According to the similarity ratio design scheme adopted in this study, the bending moment of bridge foundation pile measured in scale test is converted into prototype working condition [28]. e numerical simulation solution results agree with the test model of the reinforced concrete structure with antislide piles at the front of the bridge foundation.…”

Section: D Numerical Simulation Of Antislide Piles Of Different Nanom...mentioning

confidence: 80%

Data Analysis of the Effect of Different Nanomaterials on Antislide Pile Performance in Railway Landslides

Guo

Zheng

Ren³

2022

Advances in Materials Science and Engineering

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Engineering geological conditions in our country are complex and diverse. Many high-rise buildings, bridges, and launch towers are inevitably built on high and steep slopes. Heavy rain, earthquake, human engineering activities, and other factors lead to frequent landslides, soil creep deformation, and overall sliding, resulting in a certain bending moment and flexural deformation of foundation piles, may cause damage to the substructure and foundation pile failure, and then endanger the safety of the superstructure. In the past, bridge pile group foundation was used in bridge pile foundation engineering to improve the impact situation, but the stress environment of bridge pile foundation in landslide is obviously different from that of bridge pile foundation in the flat area. The large deformation of soil in front of the pile will easily cause the phenomenon of soil sliding and peeling, which will increase the technical difficulty of antislide pile construction. Based on this, this study firstly briefly introduces the relevant theories and technologies of railway landslide antislide pile technology and then establishes the static model of railway landslide antislide piles with different nanomaterials. Finally, the reinforcement technology of different nanomaterial antislide piles for railway landslide is expounded, which can provide guarantee for the application of different nanomaterial antislide piles for railway landslide. The results show that the preloading is carried out according to 1/10 of the design load to reduce the void between the soils. After the load is maintained for 2 hours, the load is unloaded to 0, and good skid resistance can be obtained.

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Section: D Numerical Simulation Of Antislide Piles Of Different Nanom...mentioning

confidence: 80%

Data Analysis of the Effect of Different Nanomaterials on Antislide Pile Performance in Railway Landslides

Guo

Zheng

Ren³

2022

Advances in Materials Science and Engineering

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“…It is found that applied axial magnetic field during directional solidification leads to finer grain structure and affects columnar to equiaxed transition (CET). It is known that CET can be affected by applied magnetic fields 23 . Magnetic field has several effects on liquid metal flow.…”

Section: Resultsmentioning

confidence: 99%

Directional Solidification of Aluminum A360 under Moderate DC Magnetic Field and Electric Current

et al. 2023

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Metal additive manufacturing is rapidly developing technology, but its application in wider scale is limited by several factors. One of these is expensive raw material, because it requires certain physical properties. Two most popular metal additive manufacturing methods are printing from powder and printing from wire. Wire is usually produced by drawing it from rod. Rod can be produced by directional solidification, which is well known method to study the microstructure formation depending on various parameters during solidification. In this study directional solidification of A360 aluminum alloy with electromagnetic interaction is investigated. Aluminum alloy is induction melted and then directionally solidified into the rod 12-20 mm in diameter. Aim of this work is to investigate the role of axial DC magnetic field and electric current interaction on the grain refinement and mechanical properties of A360 aluminum alloy. It is found that electromagnetic interaction can be the approach to refine the grains, regulate the growth of oriented columnar grains and to improve mechanical properties of the material.

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“…Further, we obtained a process window for the columnar to equiaxed transition of GCr18Mo steel in SMFs (Figure 10) [68]. Applying 5 T SMF can form equiaxed grains below the cooling rate of 0.312 K/s under the temperature gradient of 104 K/cm, which may potentially be used to control the columnar to the equiaxed transition of the steel casting (10 −1 −10 0 K/s).…”

Section: Smf-induced Grain Refinementmentioning

confidence: 99%

Solidification Processing of Metallic Materials in Static Magnetic Field: A Review

Hou

Zhan-yong

2022

Metals

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The application of a static magnetic field (SMF) to solidification processing has emerged as an advanced strategy for efficiently regulating the macro/micro structures and the mechanical performance of metallic materials. The SMF effects have been proved to be positive in various processes of metal solidification. Firstly, this review briefly introduces two basic magnetic effects, i.e., magnetohydrodynamic effects and magnetization effects, which play crucial roles in regulating metal solidification. Further, the state of the art of solidification processing in the SMF, including undercooling and nucleation, interface energy, grain coarsening and refinement, segregation and porosity, are comprehensively summarized. Finally, the perspective future of taking advantage of the SMF for regulating metal solidification is presented.

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Columnar to Equiaxed Transition during Directionally Solidifying GCr18Mo Steel Affected by Thermoelectric Magnetic Force under an Axial Static Magnetic Field

Cited by 7 publications

References 37 publications

Data Analysis of the Effect of Different Nanomaterials on Antislide Pile Performance in Railway Landslides

Data Analysis of the Effect of Different Nanomaterials on Antislide Pile Performance in Railway Landslides

Directional Solidification of Aluminum A360 under Moderate DC Magnetic Field and Electric Current

Solidification Processing of Metallic Materials in Static Magnetic Field: A Review

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