To see the other types of publications on this topic, follow the link: Equiaxed Solidification.

Journal articles on the topic 'Equiaxed Solidification'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Equiaxed Solidification.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Grong, Ø., A. K. Dahle, M. I. OnsØien, and L. Arnberg. "Analytical modelling of equiaxed solidification." Acta Materialia 46, no. 14 (1998): 5045–52. http://dx.doi.org/10.1016/s1359-6454(98)00166-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Rieker, C., and D. G. Morris. "Equiaxed microstructure by rapid solidification." Materials Science and Engineering: A 133 (March 1991): 854–58. http://dx.doi.org/10.1016/0921-5093(91)90201-w.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Du, Wen-Hui, Chang-Rong Li, and Chang-Ling Zhuang. "Effect of Nb addition on the solidification structure of Fe–Mn–C–Al twin-induced plasticity steel." High Temperature Materials and Processes 39, no. 1 (2020): 599–607. http://dx.doi.org/10.1515/htmp-2020-0056.

Full text
Abstract:
AbstractThe solidification microstructure of an Fe–Mn–C–Al high-Mn steel with added Nb was studied by optical microscopy and scanning electron microscopy. The results showed that the size of the columnar and equiaxed grains in the solidified structure of the high-Mn steel without added Nb was large. When Nb was added, the size of the equiaxed and columnar grains in the solidification structure of the high-Mn steel decreased. The twin-induced plasticity in the high-Mn steel with added Nb clearly refined the grain size of the solidified structure and simultaneously increased the equiaxed crystal
APA, Harvard, Vancouver, ISO, and other styles
4

McFadden, Shaun, David J. Browne, and Jerzy Banaszek. "Prediction of the Formation of an Equiaxed Zone Ahead of a Columnar Front in Binary Alloy Castings: Indirect and Direct Methods." Materials Science Forum 508 (March 2006): 325–30. http://dx.doi.org/10.4028/www.scientific.net/msf.508.325.

Full text
Abstract:
The as-cast properties of components with a columnar grain structure are very different from those with an equiaxed one. Under certain solidification conditions, zones of both structures can occur in an alloy casting; the boundary between the zones is the columnar-to-equiaxed transition (CET). A front-tracking model of dendritic solidification has been developed, which can predict the nucleation and growth of solid in undercooled liquid during a casting process. The growth process is described by dendrite tip kinetics, and is fully coupled to a fixed-grid control volume model of heat transfer
APA, Harvard, Vancouver, ISO, and other styles
5

Guo, Dongwei, Zibing Hou, Zhiqiang Peng, Qian Liu, and Jianghai Cao. "Quantitative Correlation and Control Strategy for Element Content Fluctuation along Casting Direction in Central Area of Continuous Casting Billet." Metals 11, no. 3 (2021): 452. http://dx.doi.org/10.3390/met11030452.

Full text
Abstract:
The statistical correlation was applied to analyze the specific and quantitative correlation relationship between the solidification structure and central segregation along the casting direction in carbon steel billet. On this basis, the segregation formation mechanism of the solute element and related control strategy were investigated. It is found that the equiaxed crystal zone fluctuation along the casting direction determines the fluctuation degree of central segregation. At the same time, the central segregation at a certain position is mostly affected by the equiaxed crystal zone width a
APA, Harvard, Vancouver, ISO, and other styles
6

Wu, M., Z. Zhang, H. Zhang, A. Ludwig, and A. Kharicha. "Flow-enhanced remelting of settling/floating globular crystals during mixed columnar-equiaxed solidification." IOP Conference Series: Materials Science and Engineering 1281, no. 1 (2023): 012036. http://dx.doi.org/10.1088/1757-899x/1281/1/012036.

Full text
Abstract:
Abstract Previously, the authors have used a mixed columnar-equiaxed solidification model, successfully ‘reproduced’ the solidification benchmark experiments on the Sn-10wt.%Pb alloy under natural/forced convections (travelling magnetic stirring) as performed at SIMAP laboratory [Int. J. Heat Mass Transf. 85 (2015) 438-54]. The current contribution is to address the flow-effect on the remelting of settling/floating crystals during the mixed columnar-equiaxed solidification. The re-melting or growth is controlled by diffusion of solute in the liquid boundary layer. The diffusion length due to t
APA, Harvard, Vancouver, ISO, and other styles
7

Gao, Zhi Guo. "Numerical Analysis of Nucleation and Growth of Stray Grain Formation during Laser Welding Nickel-Based Single-Crystal Superalloy Part II: Solidification Cracking Diminution through Single-Crystallinity Control." Solid State Phenomena 330 (April 12, 2022): 61–70. http://dx.doi.org/10.4028/p-88u0b0.

Full text
Abstract:
The effect of thermo-metallurgical factors, such as heat input and welding configuration, on solidification cracking driving forces nearby dendrite tip, such as solidification temperature range and columnar/equiaxed transition (CET) was thermodynamically and kinetically discussed with aid of comprehensive numerical analysis for multicomponent melt-pool solidification during laser processing under non-equilibrium solidification conditions to better understand problematical solidification cracking phenomena. By using (001)/[100] welding configuration, axisymmetrical distributions of columnar/equ
APA, Harvard, Vancouver, ISO, and other styles
8

Hutt, J. E. C., D. H. StJohn, L. Hogan, and A. K. Dahle. "Equiaxed solidification of Al–Si alloys." Materials Science and Technology 15, no. 5 (1999): 495–500. http://dx.doi.org/10.1179/026708399101506184.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Pines, Vladimir, Arnon Chait, Marianne Zlatkowski, and Christoph Beckermann. "Equiaxed dendritic solidification in supercooled melts." Journal of Crystal Growth 197, no. 1-2 (1999): 355–63. http://dx.doi.org/10.1016/s0022-0248(98)00901-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Wang, C. Y., S. Ahuja, C. Beckermann, and H. C. de Groh. "Multiparticle interfacial drag in equiaxed solidification." Metallurgical and Materials Transactions B 26, no. 1 (1995): 111–19. http://dx.doi.org/10.1007/bf02648984.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Mathier, V., A. Jacot, and M. Rappaz. "Coalescence of equiaxed grains during solidification." Modelling and Simulation in Materials Science and Engineering 12, no. 3 (2004): 479–90. http://dx.doi.org/10.1088/0965-0393/12/3/009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Ahmadein, Mahmoud, Meng Huai Wu, Peter Schumacher, and Andreas Ludwig. "A Numerical Study of the Influence of Pouring Technique on the As-Cast Structure of Al-Cu Ingots." Materials Science Forum 790-791 (May 2014): 67–72. http://dx.doi.org/10.4028/www.scientific.net/msf.790-791.67.

Full text
Abstract:
Experimental evidence [Ohno 1987] revealed the influence of some pouring techniques on the as-cast structure. In the current work the process of pouring of the molten Al-4.0 wt.%Cu via one or multiple streams into a graphite mold is studied using a 3-phase model by considering the nucleation, the initial growth and transport of globular equiaxed crystals. The three phases are the melt, air and globular equiaxed crystals. Results showed that pouring via multiple streams increases the volume fraction and number density of crystals in the as-filled state. The subsequent solidification is calculat
APA, Harvard, Vancouver, ISO, and other styles
13

Zou, Chunming, Rong Zhang, Zunjie Wei, and Hongwei Wang. "Microstructure Evolution of Mg-Sn-Y Alloy Solidified under High Pressure and Temperature Gradient." Crystals 12, no. 2 (2022): 149. http://dx.doi.org/10.3390/cryst12020149.

Full text
Abstract:
The microstructures of Mg-1Sn-2.5Y (wt%) alloys solidified under high pressures were investigated. In addition, a mathematical model was established to analyze the effects of solidification pressure and cooling rate on the average grain size. The results show that the alloy was solidified under high pressure and temperature gradient using the cooling rate difference in the high pressure chamber, resulting in the formation of the outer equiaxed zone, the columnar zone, and the equiaxed zone in the sample. With an increase in the solidification pressure, the columnar-to-equiaxed transition was i
APA, Harvard, Vancouver, ISO, and other styles
14

Mirihanage, Wajira, Shaun McFadden, and David J. Browne. "Macroscopic Model for Predicting Columnar to Equiaxed Transitions Using Columnar Front Tracking and Average Equiaxed Growth." Materials Science Forum 649 (May 2010): 355–60. http://dx.doi.org/10.4028/www.scientific.net/msf.649.355.

Full text
Abstract:
A macroscopic model of Columnar-to-Equiaxed Transition (CET) formation is presented. The growth of a columnar zone and an equiaxed zone are treated separately and modeled on a fixed grid. The model uses a columnar Front Tracking (FT) formulation to compute the motion of the columnar front and the solidification of the dendritic columnar mushy zone. The model for the equiaxed zone calculates the average growth of equiaxed grains within the control volumes of undercooled liquid. The proposed model, which calculates the average equiaxed growth, is different from previous FT models which consider
APA, Harvard, Vancouver, ISO, and other styles
15

Fezi, Kyle, and Matthew John M. Krane. "Uncertainty quantification in modelling equiaxed alloy solidification." International Journal of Cast Metals Research 30, no. 1 (2016): 34–49. http://dx.doi.org/10.1080/13640461.2016.1213525.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Fezi, K., and M. J. M. Krane. "Uncertainty Quantification of Modelling of Equiaxed Solidification." IOP Conference Series: Materials Science and Engineering 143 (July 2016): 012028. http://dx.doi.org/10.1088/1757-899x/143/1/012028.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

LIN, Xin. "Columnar to equiaxed transition during alloy solidification." Science in China Series E 46, no. 5 (2003): 475. http://dx.doi.org/10.1360/02ye0337.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Kurz, W., C. Bezençon, and M. Gäumann. "Columnar to equiaxed transition in solidification processing." Science and Technology of Advanced Materials 2, no. 1 (2001): 185–91. http://dx.doi.org/10.1016/s1468-6996(01)00047-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Charbon, C., and M. Rappaz. "3D probabilistic modelling of equiaxed eutectic solidification." Modelling and Simulation in Materials Science and Engineering 1, no. 4 (1993): 455–66. http://dx.doi.org/10.1088/0965-0393/1/4/009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Dai, H. J., H. B. Dong, H. V. Atkinson, and Peter D. Lee. "Simulation of the Columnar-to-Equiaxed Transition in Alloy Solidification - The Effect of Nucleation Undercooling, Density of Nuclei in Bulk Liquid and Alloy Solidification Range on the Transition." Solid State Phenomena 139 (April 2008): 129–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.139.129.

Full text
Abstract:
A coupled cellular automaton-finite difference (CA-FD) model is used to simulate the detailed dendritic structure evolution of the columnar-to-equiaxed transition (CET) for Al-Cu alloys during solidification. The effects of material properties (nucleation undercooling, density of nuclei in bulk liquid and alloy solidification range) on the CET are investigated. Simulated results reveal that: (1) equiaxed grains form at an earlier stage with a smaller critical nucleation undercooling; (2) CET is promoted if the density of nuclei in bulk liquid is increased; (3) extending the alloy solidificatio
APA, Harvard, Vancouver, ISO, and other styles
21

Zhao, Su, and Li Zhang. "Effect of Steel Strip-Feeding Process on Solidification Structure." Advanced Materials Research 941-944 (June 2014): 1744–47. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1744.

Full text
Abstract:
It is investigated that effect of steel strip-feeding ratio and superheat degree of molten steel on solidification structure of ingot by the steel strip-feeding experiment in the mold. The results show that: at the same superheat, with the increase of feeding ratio, the area proportion of equiaxed grain zone increases and the average size of equiaxed grain decreases, and at the same feeding ratio, the higher the superheat is, the smaller the proportion of equiaxed grain zone is, and the larger the average grain size is.
APA, Harvard, Vancouver, ISO, and other styles
22

Rausch, Alexander M., Julian Pistor, Christoph Breuning, Matthias Markl, and Carolin Körner. "New Grain Formation Mechanisms during Powder Bed Fusion." Materials 14, no. 12 (2021): 3324. http://dx.doi.org/10.3390/ma14123324.

Full text
Abstract:
Tailoring the mechanical properties of parts by influencing the solidification conditions is a key topic of powder bed fusion. Depending on the application, single crystalline, columnar, or equiaxed microstructures are desirable. To produce single crystals or equiaxed microstructures, the control of nucleation is of outstanding importance. Either it should be avoided or provoked. There are also applications, such as turbine blades, where both microstructures at different locations are required. Here, we investigate nucleation at the melt-pool border during the remelting of CMSX-4® samples buil
APA, Harvard, Vancouver, ISO, and other styles
23

Miyata, Yuichiro, Masayuki Okugawa, Yuichiro Koizumi, and Takayoshi Nakano. "Inverse Columnar-Equiaxed Transition (CET) in 304 and 316L Stainless Steels Melt by Electron Beam for Additive Manufacturing (AM)." Crystals 11, no. 8 (2021): 856. http://dx.doi.org/10.3390/cryst11080856.

Full text
Abstract:
According to Hunt’s columnar-to-equiaxed transition (CET) criterion, which is generally accepted, a high-temperature gradient (G) in the solidification front is preferable to a low G for forming columnar grains. Here, we report the opposite tendency found in the solidification microstructure of stainless steels partially melted by scanning electron beam for powder bed fusion (PBF)-type additive manufacturing. Equiaxed grains were observed more frequently in the region of high G rather than in the region of low G, contrary to the trend of the CET criterion. Computational thermal-fluid dynamics
APA, Harvard, Vancouver, ISO, and other styles
24

Wang, Qi, Yingming Wang, Yan Li, Shijie Zhang, and Ri Li. "Numerical Simulation of the Effect of Wall-Equiaxed Crystal Density on the Number of Columnar Crystals and the Thickness of an Equiaxed Crystal Layer for Al-4.7%Cu Alloy Ingot Based on 3D LBM-CA Method." Crystals 11, no. 7 (2021): 815. http://dx.doi.org/10.3390/cryst11070815.

Full text
Abstract:
In this paper, the lattice Boltzmann–cellular automata (LBM-CA) model with dynamic and static grids was used to study the growth of three-dimensional (3D) multidendrites under directional solidification with random preferred angles. In the static grid, the temperature field, flow field, and solute field during solidification were calculated by the LBM method, and in the dynamic grid, each dendrite evolution was calculated based on the CA method at its preferential crystallographic orientation. The coupling of LBM and CA was made by interpolation of the correlation quantities between the two se
APA, Harvard, Vancouver, ISO, and other styles
25

Guo, Minghu, Yuanshen Yang, Fuan Hua, and Zhuangqi Hu. "The mechanism of columnar-to-equiaxed transition during electromagnetic centrifugal solidification." International Journal of Materials Research 95, no. 9 (2004): 835–39. http://dx.doi.org/10.1515/ijmr-2004-0154.

Full text
Abstract:
Abstract A series of Hastelloy C tubes were solidified under a centrifugal field with various conditions of bulk liquid flow obtained with a controllable electromagnetic field. Their macrostructures show that the columnar-to-equiaxed transition was promoted both by increasing electromagnetic stirring and by increasing the superheat, and the application of electromagnetic stirring at different times can also influence the percentage of the total area occupied by the equiaxed region. Mechanical damage of dendrites is the most probable mechanism for the promotion of the columnar-to-equiaxed trans
APA, Harvard, Vancouver, ISO, and other styles
26

Morua, M., M. Ramirez-Argaez, and C. Gonzalez-Rivera. "On the characterization of eutectic grain growth during solidification." MRS Proceedings 1485 (2012): 161–66. http://dx.doi.org/10.1557/opl.2013.286.

Full text
Abstract:
ABSTRACTThe purpose of this work is to compare the results obtained from three methodologies intended to estimate kinetic parameters describing quantitatively the grain growth during equiaxed eutectic solidification in order to identify the best procedure to characterize grain growth kinetics. A heat transfer / solidification kinetics model is implemented to simulate the cooling and solidification of eutectic Al-Si and eutectic cast iron in sand molds. Using simulated cooling curves and volume grain density data generated by the model, the three methods are applied to obtain their predicted gr
APA, Harvard, Vancouver, ISO, and other styles
27

Zhai, Yingying, Kefeng Pan, and Dapeng Wu. "Acquiring High-Quality Oil Casing Steel 26CrMoVTiB under Optimal Continuous Casting Process Conditions." Metals 9, no. 9 (2019): 993. http://dx.doi.org/10.3390/met9090993.

Full text
Abstract:
While the solidification macrostructure of continuous cast billets is an important factor influencing the final performance and rolling yield of oil casing steel, the continuous casting process parameters have a direct influence on the solidification structure. This study simulated the solidification process of the continuous casting round billets of oil casing steel using a cellular automaton–finite element (CAFE) model. According to the simulation results, at a superheat degree of 20–35 K, a casting speed of 1.9–2.1 m/min, and a secondary cooling specific water flow of 0.34–0.45 L/Kg, the so
APA, Harvard, Vancouver, ISO, and other styles
28

Li, Ning, Limin Zhang, Rong Zhang, Pengfei Yin, Hui Xing, and Hongjing Wu. "Research on Grain Refinement in Hypoeutectic Al-Si Alloy during Solidification under an Alternating Electric Current Pulse." Metals 9, no. 5 (2019): 571. http://dx.doi.org/10.3390/met9050571.

Full text
Abstract:
Experiments on transient directional solidification were carried out to study the columnar to equiaxed transition (CET) in Al-7Si alloy without and with an alternating electric current pulse (AECP). Without AECP, the macrostructure consists of typical columnar and equiaxed zones, separated by a near horizontal plane. As the AECP is applied during solidification, an additional fine equiaxed zone (FEZ) occurs in the as-cast macrostructure. From measured temperature profiles, cooling rate and temperature gradient are determined. It is found that CET occurs for a critical value of the cooling rate
APA, Harvard, Vancouver, ISO, and other styles
29

Gao, Zhiguo. "Numerical Analysis of Solidification Behavior during Laser Welding Nickel-based Single-crystal Superalloy Part IV: Optimization of Thermo-metallurgical Factors." Journal of Physics: Conference Series 1996, no. 1 (2021): 012004. http://dx.doi.org/10.1088/1742-6596/1996/1/012004.

Full text
Abstract:
Abstract Important metallurgical factors, such as alloying aluminum redistribution, supersaturation and undercooling of dendrite tip around solid/liquid interface, are separately optimized to alleviate stray grain formation and columnar/equiaxed transition (CET) with series of welding conditions and provide a very efficient method for microstructure control through modification of growth kinetics of dendrite tip under nonequilibrium solidification conditions of ternary Ni-Cr-Al molten pool. Asymmetrical (001)/[110] welding configuration is inferior to symmetrical (001)/[100] welding configurat
APA, Harvard, Vancouver, ISO, and other styles
30

Rodrigues, Christian M. G., Menghuai Wu, Haijie Zhang, Andreas Ludwig, and Abdellah Kharicha. "Bridging Capillary-Driven Fragmentation and Grain Transport with Mixed Columnar-Equiaxed Solidification." Metallurgical and Materials Transactions A 52, no. 10 (2021): 4609–22. http://dx.doi.org/10.1007/s11661-021-06414-2.

Full text
Abstract:
AbstractIn this study, a first attempt is made to bridge capillary-driven fragmentation and grain transport using a mixed columnar-equiaxed solidification model. Grain transport is an intrinsic feature of the employed solidification model which has been extensively investigated over the years. Regarding the capillary-driven fragmentation event, a new correlation between the number of fragments and interfacial area density of the columnar structure was recently established by Cool and Voorhees (2017) based on experimental research under isothermal conditions. Here, we propose to modify Cool and
APA, Harvard, Vancouver, ISO, and other styles
31

Nagels, Els, and Ludo Froyen. "Columnar to Equiaxed Transition in Al-Cu-Ag." Materials Science Forum 649 (May 2010): 379–84. http://dx.doi.org/10.4028/www.scientific.net/msf.649.379.

Full text
Abstract:
In this work the transition from columnar to equiaxed growth is studied during the solidification of the univariant eutectic L=> α(Al) + θ-Al2Cu in the ternary Al-Cu-Ag system. The columnar to equiaxed transition (CET) in a ternary system behaves very similar to the CET observed in binary systems [1]. It is observed that the CET occurs at lower temperature gradients when the amount of the third alloying element, in this case Ag, is increased. Another important solidification parameter is the cooling rate of the furnace. When the cooling rate is increased, the CET will occur at lower positio
APA, Harvard, Vancouver, ISO, and other styles
32

Ahmadein, Mahmoud, Meng Huai Wu, Mehaela Stefan Kharicha, Abdella Kharicha, and Andreas Ludwig. "Simulation of Solidification and Convection of NH4Cl-H2O Solution in a Water-Cooled Copper Mold." Materials Science Forum 790-791 (May 2014): 247–52. http://dx.doi.org/10.4028/www.scientific.net/msf.790-791.247.

Full text
Abstract:
The convection pattern and the evolution of mushy zone, temperature and solidification structure are measured during solidification of NH4Cl-70%H2O solution in a water-cooled copper mold with transparent sidewalls. The natural convection and crystal sedimentation are measured via Particle Image Velocimetry (PIV) technique. This experiment is simulated using a 5-phase mixed columnar-equiaxed solidification model proposed by current authors [Comp. Mater. Sci. 50 (2010) 32-4]. The 5 phases comprise the extradendritic melt, the solid dendrite and interdendritic melt inside the equiaxed grains, the
APA, Harvard, Vancouver, ISO, and other styles
33

Koseki, Toshihiko. "Equiaxed Solidification of Steel Nucleating on Titanium Nitride." Journal of the Japan Institute of Metals 65, no. 7 (2001): 644–51. http://dx.doi.org/10.2320/jinstmet1952.65.7_644.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Heringer, R., Ch A. Gandin, G. Lesoult, and H. Henein. "Atomized droplet solidification as an equiaxed growth model." Acta Materialia 54, no. 17 (2006): 4427–40. http://dx.doi.org/10.1016/j.actamat.2006.05.015.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Montiel, David, Sebastian Gurevich, Nana Ofori-Opoku, and Nikolas Provatas. "Characterization of late-stage equiaxed solidification of alloys." Acta Materialia 77 (September 2014): 183–90. http://dx.doi.org/10.1016/j.actamat.2014.05.063.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Burbelko, Andriy, Jacek Początek, Daniel Gurgul, and Marek Wróbel. "Micromodeling of the Diffusion-Controlled Equiaxed Peritectic Solidification." steel research international 85, no. 6 (2014): 1010–17. http://dx.doi.org/10.1002/srin.201300174.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Martorano, Marcelo Aquino, Davi Teves Aguiar, and Juan Marcelo Rojas Arango. "Multigrain and Multiphase Mathematical Model for Equiaxed Solidification." Metallurgical and Materials Transactions A 46, no. 1 (2014): 377–95. http://dx.doi.org/10.1007/s11661-014-2620-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Duan, Zhen Hu, Xuan Du, Hou Fa Shen, and Bai Cheng Liu. "Experimental and Numerical Study of Macrosegregation in a 160 Steel Ingot." Materials Science Forum 850 (March 2016): 299–306. http://dx.doi.org/10.4028/www.scientific.net/msf.850.299.

Full text
Abstract:
Large steel ingots are the important material for the equipment manufacturing industry. It is still difficult to predict and control the macrosegregation in ingot. In this paper, the cooling curves at the surface of ingot and temperature variation of the mold were measured. The carbon distribution was measured through the local region dissection of ingot. Then, based on the definite the heat transfer coefficient at the interface of mold/ingot, a two-phase model with consideration of the motion of equiaxed grains is applied for the prediction of macrosegregation in 160-t steel ingot formed duri
APA, Harvard, Vancouver, ISO, and other styles
39

Wołczyński, W., P. Kwapisiński, B. Kania, W. Wajda, W. Skuza, and A. W. Bydałek. "Numerical Model for Solidification Zones Selection in the Large Ingots." Archives of Foundry Engineering 15, no. 4 (2015): 87–90. http://dx.doi.org/10.1515/afe-2015-0085.

Full text
Abstract:
Abstract A vertical cut at the mid-depth of the 15-ton forging steel ingot has been performed by curtesy of the CELSA - Huta Ostrowiec plant. Some metallographic studies were able to reveal not only the chilled undersized grains under the ingot surface but columnar grains and large equiaxed grains as well. Additionally, the structural zone within which the competition between columnar and equiaxed structure formation was confirmed by metallography study, was also revealed. Therefore, it seemed justified to reproduce some of the observed structural zones by means of numerical calculation of the
APA, Harvard, Vancouver, ISO, and other styles
40

Rátkai, L., L. Gránásy, and T. Pusztai. "Phase-field lattice Boltzmann model of growth and buoyancy driven motion of dendritic particles: the effect of Coriolis force." IOP Conference Series: Materials Science and Engineering 1274, no. 1 (2023): 012047. http://dx.doi.org/10.1088/1757-899x/1274/1/012047.

Full text
Abstract:
Abstract A phase-field lattice Boltzmann (PFLB) model we developed recently (Rátkai L, Pusztai T and Gránásy L 2019 npj Comput. Mater. 5 113) was adapted to investigate the effect of Coriolis force on the solidification morphology forming in a centrifuge. The moving particles are handled using an overlapping multi-grid scheme, assigning a separate moving grid to each individual particle, with attached local fields. Relying on this approach, solidification problems, in which solute diffusion, melt flow, solid motion, the effect of gravity and collision of the particles occur simultaneously can
APA, Harvard, Vancouver, ISO, and other styles
41

Chen, Ming, Yu Jiang, Wen Long Sun, Xiao Dong Hu, and Chun Li Liu. "Numerical Simulation of Binary Alloy Crystal Growth of Multiple Dendrites and Direcitonal Solidification Using Phase-Field Method." Advanced Materials Research 774-776 (September 2013): 703–6. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.703.

Full text
Abstract:
Phase field method (PFM) offers the prospect of carrying out realistic numerical calculation on dendrite growth in metallic systems. The dendritic growth process of multiple dendrites and direcitonal solidification during isothermal solidifications in a Fe-0.5mole%C binary alloy were simulated using phase field model. Competitive growth of multiple equiaxed dendrites were simulated, and the effect of anisotropy on the solute segregation and microstructural dedritic growth pattern in directional solidification process was studied in the paper. The simulation results showed the impingement of ar
APA, Harvard, Vancouver, ISO, and other styles
42

Wang, Zhang, Tie, et al. "Initial Transfer Behavior and Solidification Structure Evolution in a Large Continuously Cast Bloom with a Combination of Nozzle Injection Mode and M-EMS." Metals 9, no. 10 (2019): 1083. http://dx.doi.org/10.3390/met9101083.

Full text
Abstract:
A three-dimensional numerical model combining electromagnetic field, fluid flow, heat transfer, and solidification has been established to study the effect of nozzle injection mode and mold electromagnetic stirring (M-EMS) on the internal quality of a continuously cast bloom. The model is validated by measured data of the magnetic flux density along the stirrer center line. According to the simulation and experimental results, M-EMS can introduce a horizontal swirling flow ahead of the solidification front, promoting the superheat dissipation of molten steel and columnar to equiaxed transition
APA, Harvard, Vancouver, ISO, and other styles
43

Elmquist, Lennart, Kaisu Soivio, and Attila Diószegi. "Cast Iron Solidification Structure and how it is Related to Defect Formation." Materials Science Forum 790-791 (May 2014): 441–46. http://dx.doi.org/10.4028/www.scientific.net/msf.790-791.441.

Full text
Abstract:
In this work, the meaning of the solidification structure and how it is related to defect formation in grey cast iron will be discussed. The work also confirms observations made earlier. In previous work the formation of shrinkage porosity in grey cast iron cylinder heads was investigated. It was found that the defect is located around solidification units resembling primary austenite grains. The solidification of grey cast iron starts with the formation of primary austenite grains, followed by the eutectic solidification. The primary grains nucleate and grow either as columnar or equiaxed gra
APA, Harvard, Vancouver, ISO, and other styles
44

Zheng, Hong-guang, Li-jiang Yao, and Heng Xu. "Effect of Two Kinds of Refiners on the Solidification Structure and Property of Invar Alloy." High Temperature Materials and Processes 32, no. 4 (2013): 375–81. http://dx.doi.org/10.1515/htmp-2012-0153.

Full text
Abstract:
AbstractThe solidification structure of two 500 g cylindrical ingots of Fe-36Ni invar alloy, which were melted in a carbon tube furnace and cast adding Ce and Zr-Ti refiners respectively, were investigated. The results showed that the grain size became smaller. With the increase of refiner content, the ratio of equiaxed grains of ingot increased and the equiaxed grain size decreased. As for the 100 kg flat ingot, which was melted in a vacuum induction furnace and cast with Ce and Zr-Ti refiners respectively, the situation was different slightly. When adding Ce the dendritic grain diameter of t
APA, Harvard, Vancouver, ISO, and other styles
45

Könözsy, Laszlo, Mihaela Stefan Kharicha, Sven Eck, Meng Huai Wu, and Andreas Ludwig. "Numerical and Experimental Investigation of NH4Cl Solidification." Materials Science Forum 649 (May 2010): 367–72. http://dx.doi.org/10.4028/www.scientific.net/msf.649.367.

Full text
Abstract:
This paper deals with the validation of a volume averaged multiphase solidification model based on a benchmark experiment using NH4Cl-H2O as model alloy and Particle Image Velocimetry (PIV) as optical measurement method. For the numerical modelling of the solidification, different phases (e.g. liquid, equiaxed grains and columnar dendrite trunks) have been considered. The mass, momentum, energy conservation and species transport equations for each phase have been solved. The Eulerian-Eulerian model equations have been implemented in the commercial Finite Volume Method based software FLUENT-ANS
APA, Harvard, Vancouver, ISO, and other styles
46

Asante, J. T., C. W. Siyasiya, and K. A. Annan. "Effect of Al addition on the solidification structure of 441 dual stabilised ferritic stainless steel." MATEC Web of Conferences 370 (2022): 03003. http://dx.doi.org/10.1051/matecconf/202237003003.

Full text
Abstract:
Ferritic stainless steels (FSS) develop poor surface finish during processing and this is attributed to the large columnar grains formed during solidification. Addition of alloying elements such as Al, Ti and Nb used in dual stabilized FSS improve the solidification structures. In this work, two 441 dual stabilized FSS, with 0.023 and 0.068 %Al respectively were investigated in the as-cast condition. The columnar to equiaxed zone ratio was determined by the linear interception method. The results showed that the higher the Ti/Al ratio, the higher the equiaxed ratio. The inclusions reported fro
APA, Harvard, Vancouver, ISO, and other styles
47

Wang, Qiming, Guoguang Cheng, and Yuyang Hou. "Effect of Titanium Addition on As-Cast Structure and High-Temperature Tensile Property of 20Cr-8Ni Stainless Steel for Heavy Castings." Metals 10, no. 4 (2020): 529. http://dx.doi.org/10.3390/met10040529.

Full text
Abstract:
20Cr-8Ni stainless steel is used to manufacture heavy castings in industrial practice. Owing to the slow solidification rate of heavy castings, the as-cast structure is usually coarse, which reduces the mechanical properties. To refine the solidification structure, the effect of titanium addition on the as-cast structure and high-temperature tensile property was investigated in the laboratory. The ingots with 0.0036, 0.2, and 0.45 mass percent titanium were produced in the laboratory. On the basis of experiment and thermodynamic calculation through Thermo-Calc software, the typical inclusions
APA, Harvard, Vancouver, ISO, and other styles
48

Wang, Lei, Xian Yong He, Qin Peng, Rong Yang, and Qi Jie Zhai. "Effect of Cooling Rate and Si Content on Solidification Characteristics of Silicon Steel during Near-Rapid Solidification." Advanced Materials Research 146-147 (October 2010): 1247–51. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.1247.

Full text
Abstract:
The solidification characteristics of silicon steel in twin roll strip casting was studied by physical simulation. The experiments were designed to approximate the solidification conditions of twin roll strip casting. The strips with different cooling rate and different silicon content were prepared. The results show that the solidification structures of the strips with different cooling rate and different Si content are composed of columnar and equiaxed grains, and the solidification structures vary significantly. And with the decrease of cooling rate, the linear contraction rate decreases.
APA, Harvard, Vancouver, ISO, and other styles
49

Shi, Xiaofang, and Lizhong Chang. "Equiaxed Solidification of 430 Ferritic Stainless Steel Nucleating on Core-Containing Ti." High Temperature Materials and Processes 37, no. 9-10 (2018): 951–59. http://dx.doi.org/10.1515/htmp-2017-0173.

Full text
Abstract:
AbstractThe solidification structure of ferritic stainless steel can be refined by controlling the contents of Ti, O, and N in the liquid steel through the thermodynamic analysis and high-temperature experiment. It is found by the scanning electron microscopy technology, in which the composite core of Ti nitride-enwrapping Ti oxide can be formed in the solidification front, which promotes the nucleation of δ iron and refines the solidification structure. Meanwhile, the structure analysis of the composite core by the transmission electron microscope technology proves that the Ti oxide that exis
APA, Harvard, Vancouver, ISO, and other styles
50

Yang, Yuan Sheng, Quan Zhou, and Zhuang Qi Hu. "The Influence of Electric Current Pulses on the Microstructure of Magnesium Alloy AZ91D." Materials Science Forum 488-489 (July 2005): 201–4. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.201.

Full text
Abstract:
The microstructure evolution of magnesium alloy AZ91D solidified with different electric current pulses and cooling rates was investigated and a new method, Low-voltage Electric Current Pulses (LVECP), to produce semi-slurry magnesium alloy was developed in this paper. The experimental results showed that the electric current pulses during solidification changed morphology of dendrites and the equiaxed, non-dendritic grains formed. The size of the primary a-Mg particles in semi-solid AZ91D alloy and the sphericity of the particles decreased with increase of discharging the voltage and treating
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!