Relevant bibliographies by topics / Remelting process

Academic literature on the topic 'Remelting process'

Author: Grafiati
Published: 8 June 2024

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Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Journal articles on the topic "Remelting process":

1

Mróz, M., W. Orłowicz, and M. Tupaj. "Geometry of Remeltings and Efficiency of the Surface Remelting Process Applied to Cobalt Alloy Castings." Archives of Foundry Engineering 13, no. 2 (June 1, 2013): 95–98. http://dx.doi.org/10.2478/afe-2013-0044.

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Abstract The paper summarises results of measurements of remelting area geometry, thermal efficiency and melting efficiency characterising the surface remelting process applied to castings of MAR-M-509 cobalt alloy. The remelting process was carried out with the use of GTAW (Gas Tungsten Arc Welding) method in protective atmosphere of helium, at the electric current intensity in the range from 100 A to 300 A, and the electric arc scanning velocity vs in the range from 200 mm/min to 800 mm/min. The effect of current intensity and electric arc scanning velocity on geometrical parameters of remeltings, thermal efficiency, and melting efficiency characterising the remelting process has been determined.
2

Trytek, Andrzej Stanisław, Mirosław Tupaj, Ján Majerník, Štefan Gašpár, Wiktoria Zbyrad-Kołodziej, and Karol Łysiak. "Surface Remelting of Mold Inserts Made of NC11 Steel." Journal of Casting & Materials Engineering 4, no. 1 (March 31, 2020): 9–15. http://dx.doi.org/10.7494/jcme.2020.4.1.9.

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In the study presented in this paper, the effect of a concentrated heat stream on geometry, microstructure, and hardness of superficial remeltings on NC11 steel is examined. The material is used for disposable mold inserts exposed to intensive abrasive wear in the course of the press-molding of hard aggregate stampings for refractory bricks. As a result of local remelting, the hardness of the steel surface increased and its microstructure was altered. Macro- and microstructure of the remelted areas was examined with the use of optical microscopy and measurements of remelting area geometry were carried out for different parameters of the remelting process. Hardness measurements were taken in the remelting area and in the heat-affected zone. The state of stress in the material before remelting and in the remelted area was also evaluated.
3

Arh, Boštjan, Bojan Podgornik, and Jaka Burja. "Electroslag remelting: A process overview." Materiali in tehnologije 50, no. 6 (December 12, 2016): 971–79. http://dx.doi.org/10.17222/mit.2016.108.

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Ding, Wan Wu, Jiang Tao Zhu, Wen Jun Zhao, and Tian Dong Xia. "Microstructure Evolution of Al-Ti-C Alloy Wires during Remelting Process." Advanced Materials Research 652-654 (January 2013): 1119–23. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.1119.

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The regular pattern of evolution of TiC and TiAl3 during the remelting process of Al-Ti-C alloy wires was analyzed and the impact mechanism was discussed. The results show that: when the temperature of the remelting mass is at 730°C, with the increase of the heat preservation time of remelting, the degree of agglomeration of the original dispersed TiC will increase, and they are pushed toward crystal boundaries by α-Al during the solidification process, while TiAl3 will dissolve, aggregate, and grow. When the remelting temperature is at 1000°C, as the heat preservation time increases, not only the agglomeration degree of TiC increases significantly compared to that at 730 °C and the sizes and shapes of TiAl3 change significantly as well. The morphology of TiAl3 will change from being lump-and-short-rod-like to needle-and-flake-like. Before and after remelting, the Al-Ti-C alloys are both composed of TiAl3 and TiC, with no other phases formed.
5

Šturm, Roman, and Janez Grum. "Influence of Laser Remelting Process on Strain and Residual Stresses in Nodular Iron." Materials Science Forum 681 (March 2011): 188–93. http://dx.doi.org/10.4028/www.scientific.net/msf.681.188.

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The present paper deals with residual stress and strain changes in thin flat specimens of nodular cast iron during laser remelting process. In laser remelting process of a workpiece we have used several laser beam passages across the workpiece surface. The state of internal stress in the workpiece changes because of different ways of guiding the laser beam across the workpiece surface, and consequently strain of the workpiece may occur. In the process of gradual remelting of the specimen surface, i.e. during its heating and cooling, volume changes in the specimen surface layer occur due to thermal and microstructural changes. To find out more about volume changes in the thin surface layer of specimens, the latter were monitored by measuring the strain at the lower side of the specimens during and after the remelting process, and also by residual stress measurement in the thin surface layer. The results obtained confirm that the laser remelting process could be successfully optimised on the basis of knowing the residual stresses and the strain generated during the remelting process.
6

Yi, Rong Xi, Xiao Qiu Zheng, Shi Kun Xie, and Xiu Yan Guo. "Study on the Remelting Process of Rare Earth Al-4.5Cu." Applied Mechanics and Materials 66-68 (July 2011): 1854–57. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1854.

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The influences of heating temperature and holding time on the microstructures were investigated during the semi-solid remelting process of rare earth Al-4.5Cu alloy. The evolution mechanism of crystal organization was discussed. Experiments show that the heating temperature and holding time are very important to the grain size and uniformity. It is the most suitable parameters, as heating temperature is 630°C and holding time is 20 minutes, to remelting process. During the remelting process, grain mergering and Ostwald growing up is the main mechanism of change on microstructures.
7

Guo, Hua Feng, Tao Sun, Zhi Li, and Ju Li Li. "Influence of Process Parameters on Temperature Field in Laser Remelting Coating Prepared by Plasma Spraying on Titanium Alloy Surface." Applied Mechanics and Materials 197 (September 2012): 802–7. http://dx.doi.org/10.4028/www.scientific.net/amm.197.802.

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In order to research the effect of process parameters on temperature field evolution in laser remelting coating prepared by plasma spraying on titanium alloy surface，the finite element model of laser multi-tracks remelting temperature field was established based on ANSYS, and remelting temperature field was analyzed. The analysis results show that: under certain scanning velocity and laser spot diameter, too small laser power can't achieve metallurgical combination between coating and substrate; the effect on temperature field of scanning velocity was smaller than laser power; the influence on molten pool center temperature and remelting width of spot diameter is bigger; preheating coating and substrate can be effectively balance remelting process temperature field, thereby reducing the thermal stress and coating cracks appear chance.Through the calculation model can master the evolution of the temperature of lasre remelting process and can provide the theory basis for process parameter selection and optimization.
8

INOUYE, Michio. "Present Status of Electroslag Remelting Process." Tetsu-to-Hagane 73, no. 2 (1987): 233–41. http://dx.doi.org/10.2355/tetsutohagane1955.73.2_233.

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DONG, Yan-wu, Zhou-hua JIANG, and Zheng-bang LI. "Mathematical Model for Electroslag Remelting Process." Journal of Iron and Steel Research, International 14, no. 5 (September 2007): 7–30. http://dx.doi.org/10.1016/s1006-706x(07)60065-x.

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Dong, Yan-wu, Zhou-hua Jiang, and Zheng-bang Li. "Mathematical Model for Electroslag Remelting Process." Journal of Iron and Steel Research International 14, no. 5 (May 2007): 7–12. http://dx.doi.org/10.1016/s1006-706x(08)60042-4.

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You might also be interested in the extended bibliographies on the topic 'Remelting process' for particular source types:
Journal articles Dissertations / Theses

Dissertations / Theses on the topic "Remelting process":

1

Hernández-Morales, José Bernardo. "Electromagnetic stirring with alternating current during electroslag remelting." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28385.

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The electroslag remelting process combines both a chemical refining ability and a better control on solidification which produces materials of more uniform properties. In spite of the advantages of this process, segregation-prone alloys are still difficult to produce via ESR, particularly when large ingot diameters are involved. In this context the study of externally applied electromagnetic fields is of great interest. An AC operated stirring device was designed and laboratory-scale experiments were conducted. The solidification structures resulting from the stirring as well as the mixing conditions prevailing in the liquid pool were investigated. Also, modelling studies on the electromagnetic body force produced by the stirrer and the resulting thermal field were conducted. The start of stirring results in a clearly defined band in both steady- and unsteady-state regimes. The microstructure was not significantly modified in the center of the ingot but a loss in directionality was found at the mould wall. It seems apparent that the stirred liquid does not penetrate significantly inside the interdendritic region. Mixing studies revealed that the degree of mixing in the pool is enhanced by the stirring. The theoretical calculations show that most of the electromagnetic body force is confined to the magnetic skin depth at the mould wall and the metal-slag interface. Using a previously developed two-dimensional heat transfer model it was not possible to reproduce the experimental pool profiles obtained when stirring was applied.
Applied Science, Faculty of
Materials Engineering, Department of
Graduate
2

Wani, Nitin Yashwant. "Simulation of thermal stresses in vacuum arc remelting process." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1178820121.

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Polton, Richard. "Numerical grid generation and its application in the solution of a model of the Vacuum-Arc Remelting (VAR) process." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323918.

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MUCSI, CRISTIANO S. "Estudo sobre o processo V.A.R. (Vacuum Arc Remelting) escala de laboratorio." reponame:Repositório Institucional do IPEN, 1996. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10472.

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Made available in DSpace on 2014-10-09T12:40:50Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:06:54Z (GMT). No. of bitstreams: 1 02949.pdf: 9168361 bytes, checksum: 474a2e1dcf103e26b6863b7d40ff33a1 (MD5)
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
5

Décultot, Léa. "Étude et modélisation du procédé de refusion par plasma d’arc en creuset froid (PAMCHR) d’alliages de titane pour des applications aéronautiques." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0031.

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Le procédé Plasma Arc Melting Cold Hearth Refining (PAMCHR) permet de recycler des chutes de titane afin d’élaborer des alliages de titane de qualité aéronautique. Les travaux de thèse présentés dans ce manuscrit se concentrent sur l’étape d’affinage du procédé. Elle correspond, après fusion de la matière et avant coulée en lingotière, au transport du métal liquide dans un creuset à fond plat en cuivre refroidi à l’eau. L’apport de chaleur du procédé se fait par des torches à plasma, dans un environnement de gaz inerte. Une modélisation tridimensionnelle de l’écoulement thermo-hydrodynamique de l’alliage de titane, a été développée avec pour base le logiciel CFD Ansys-Fluent. L’objectif de cet outil, nommé PAM3D, est d’améliorer notre compréhension du comportement du titane liquide au sein du creuset d’affinage. Un grand nombre de fonctions ont été intégrées au modèle pour décrire, entre autres, les transferts thermique et dynamique entre le jet de plasma et la surface du bain liquide. La compréhension de ces transferts est primordiale à la modélisation du procédé : ils ont pu être obtenus à l’aide d’une série d’essais, réalisés sur un four pilote PAMCHR, et de simulations obtenues par le développement de deux modèles numériques simples. Des résultats de simulations obtenues par cette première version de PAM3D sont confrontés à des mesures prises à partir de fusions expérimentales, et la comparaison est jugée satisfaisante. Cependant, la valeur maximale implémentée dans le modèle de la contrainte pariétale, dû à l’impact de la torche à la surface du bain, semble être sous-estimée. Des simulations complémentaires mettent d’ailleurs en avant le rôle important des forces hydrodynamiques sur le comportement thermique du bain, et en particulier de cette contrainte pariétale
The recycling of titanium scraps can be achieved using the Plasma Arc Melting Cold Hearth Refining (PAMCHR) process with the aim of producing aeronautical titanium alloy ingots. In this manuscript, the research work focuses on the refining stage of the process where the liquid is transported in a horizontal copper water-cooled crucible. This important step takes place downstream the melting of the charge and upstream the casting of liquid titanium into the ingot mold crucible. Plasma torches are used as heat source of PAMCHR process, which is conducted under an atmosphere of inert gas. A three-dimensional modeling of the thermo-hydrodynamic flow of the titanium alloy has been set up based on Ansys-Fluent CFD software. The purpose of this tool, named PAM3D, is to improve our understanding of the liquid titanium behavior within the refining crucible. A large number of user functions have been integrated into the model to describe, among other mechanisms, the thermal and momentum transferred from the plasma plume to the surface of the liquid bath. The analysis of these transfers is essential for modeling the process. They are obtained by a study coupling melting tests, carried out in a pilot PAMCHR furnace, and numerical modeling. Numerical results, obtained by this first version of PAM3D are compared to experimental measurements, and the agreement is satisfactory. However, the maximum value of the shear stress, due to the impact of the plasma plume on the bath surface, implemented in the model seems to be underestimated. Moreover, complementary simulations highlight the important role of hydrodynamic forces on the thermal behavior of the bath, and in particular of this shear stress
6

Souza, Edvaldo Roberto de. "Caracterizações microestruturais e avaliações das propriedades mecânicas das juntas em aço inoxidável AISI 301 L soldadas por MIG e submetidas ao reparo pelo processo TIG." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-22082016-143920/.

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A soldagem tem grande importância no setor metroferroviário, pois é empregada na fabricação de componentes estruturais e no acabamento de vagões de passageiros, que em sua maior parte são de aço inoxidável. As juntas soldadas podem apresentar descontinuidades que são interrupções que afetam as propriedades mecânicas e metalúrgicas da junta soldada. A presença destas descontinuidades, dependendo do seu tamanho, natureza ou efeito combinado, pode ocasionar a reprovação da junta soldada, quer pela redução de propriedades mecânicas ou pela não aceitação, segundo critérios estabelecidos em normas. Uma estrutura que tenha uma solda reprovada durante sua qualificação ou inspeção, pela presença de descontinuidades pode ser recuperada, por meio de um retrabalho a ser realizado nesta junta. A refusão do cordão de solda por meio do processo TIG (Tungsten Inert Gas), sem a utilização do material de adição, é uma técnica de retrabalho que pode ser empregada, em especial pela viabilidade técnica e econômica do processo. Neste estudo analisou-se a influência que o processo de reparo por soldagem TIG exerceu no comportamento mecânico e microestrutural das juntas soldadas pelo processo MIG, por meio de: ensaios mecânicos (tração, fadiga e microdureza Vickers), ensaios não destrutivos (inspeção visual e líquidos penetrantes) e caracterização microestrutural do cordão de solda. Resultados das amostras de ensaio de tração e fadiga indicaram que o reparo dos cordões de solda não alterou o comportamento mecânico das juntas. As juntas submetidas ao reparo nas quais foram retirados os reforços dos cordões apresentaram modificações nas propriedades mecânicas, mas também apresentaram resultados satisfatórios.
The welding has great importance in manufacture of subway cars because it is used in the manufacture of structural components and finishing in passenger cars which are mostly stainless steel. Joints may show the presence of discontinuities. The discontinuities are interruptions that affect the mechanical and metallurgical properties of the weld. The presence of these discontinuities, depending on their size, nature or the combined effect may lead to failure of the weld either by reduction of mechanical properties or non-acceptance criteria established in standards. A structure that has a weld failed during its qualification or inspection by the presence of discontinuities can be retrieved through a rework to be done in this joint. The remelting of the weld using the TIG process without the use of additional material, rework is a technique that can be employed in particular the technical and economic feasibility of the process. This study analyzes the influence that the process of TIG welding rework has on mechanical behavior and microstructure of welded joints by means of: mechanical tests (tensile and Vickers hardness), non-destructive testing (visual inspection and liquid penetrant) and characterization microstructure of the weld. Results of tensile test specimens and fatigue indicated that the repair of the weld beads did not change the mechanical behavior of joints. The joints subjected to repair in which they were removed the ribs of the beads showed changes in the mechanical properties, but also had satisfactory results.
7

Hroš, Michal. "Optimalizace podmínek dvojitého přetavení elektronovým paprskem v procesu přípravy TBC povlaků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400832.

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Thermal barrier coatings (TBCs) are commonly used for thermal protection of components in modern gas turbine application and typically consisting of ceramic top coat and CoNiCrAlY bond coat (BC), both thermally sprayed. Nanostructured CoNiCrAlY bond coatings were deposited onto Ni-based alloy (Inconel 718) by both HVOF and CGDS spraying techniques. Subsequently the deposits were remelted by electron beam up to depth of about 100 m which resulted in removal of defects on the substrate to the bond coat interface. The primary objective of this thesis was to investigation of the influence of parameters used for EB remelting, including multiple remelting on the microstructural changes, phase modification and final state of the coatings. The amount of porosity in the coatings and surface roughness has been evaluated. Scanning electron microscopy and X-Ray diffraction were performed in order to characterize the phase modification before and after the applied treatment. The results indicated that multiple remelting process improved the coating properties in terms of porosity, smooth surface, strength and chemical homogeneity and at last but not least this study demonstrate that low-temperature processing of CoNiCrAlY bond coat represents an interesting and promising alternative for their manufacturing.
8

Ahn, Seokyoung Beaman Joseph J. "Modeling, estimation, and control of electroslag remelting process." 2005. http://repositories.lib.utexas.edu/bitstream/handle/2152/1494/ahns17441.pdf.

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Ahn, Seokyoung. "Modeling, estimation, and control of electroslag remelting process." Thesis, 2005. http://hdl.handle.net/2152/1494.

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XIE, JUN-JIE, and 謝俊傑. "Study on die- casting die service life improvement by laser-remelting process." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/2bpccz.

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碩士
國立中央大學
機械工程學系在職專班
107
High pressure die-casting is one of the most widely used and important manufacturing method in modern industry, but the working environment is often dangerous, hard and dirty due to its high temperature and high noise. This is the reason why fewer people are willing to devote themselves to the job, and furthermore, most of researches about high pressure die-casting is academic study. One of the most important problem in the die-casting process is die service life improvement, and the problem affects not only capacity of production but also quality. In this paper, die- casting die service life improvement by laser-remelting process is investigated. In the view of microstructure, the main cause of thermal fatigue crack of die-casting die and inhibiting the propagation of the crack is discussed. Finally, finding the high-risk region where thermal fatigue crack occurs is worked out by the application of CAE(Computer Aided Engineering) technology.
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Books on the topic "Remelting process":

1

Engh, Thorvald Abel, Geoffrey K. Sigworth, and Anne Kvithyld. Principles of Metal Refining and Recycling. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198811923.001.0001.

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Covers the field of recycling and refining of metals. An important point the book stresses is that the principles are the same in the treatment of various different metals. The book answerd why it is important to have a clean and properly alloyed metal from recycling and refined metal? The text covers basic thermodynamics, physical and transport properties, mixing, mass transfer and numerical models. Further it identifies problems and described methods for removal of dissolved impurity elements, particles and inclusions, also during solidification. And lastly applications remelting and addition of alloys, recycling and challenges and specific processes for each metal are included. The book is self-contained.

Book chapters on the topic "Remelting process":

1

Li, Jing, and Chengbin Shi. "Carbides Control in Electroslag Remelting Process." In Carbide in Special Steel, 59–108. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1456-9_2.

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Kharicha, A., A. Ludwig, and M. Wu. "3D Simulation of the Melting during an Electro-Slag Remelting Process." In EPD Congress 2011, 770–78. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495285.ch84.

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Wang, Qiang, Zhu He, and Baokuan Li. "Modeling of Magnetohydrodynamic, Thermal and Solidified Behavior in Electroslag Remelting Process." In EPD Congress 2014, 409–15. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118889664.ch49.

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Zhuo, Y., X. F. Yin, and D. M. Yang. "The Damage of the SiC/Al Preform Wire During Remelting Process." In Controlled Interphases in Composite Materials, 277–83. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-7816-7_27.

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Pericleous, Koulis, Georgi Djambazov, Mark Ward, Lang Yuan, and Peter D. Lee. "A Multi-Scale 3D Model of the Vacuum Arc Remelting Process." In Supplemental Proceedings, 291–98. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118357002.ch38.

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Birol, Burak, and Muhlis Nezihi Saridede. "Recycling of High Quality Steel Scraps Directly in Electroslag Remelting Process (ESR)." In EPD Congress 2011, 959–65. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495285.ch106.

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Kharicha, A., M. Wu, and A. Ludwig. "Variation of the Resistance during the Electrode Movement in the Electroslag Remelting Process." In Proceedings of the 2013 International Symposium on Liquid Metal Processing and Casting, 145–50. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118830857.ch22.

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Kharicha, A., M. Wu, and A. Ludwig. "Variation of the Resistance During the Electrode Movement in the Electroslag Remelting Process." In Proceedings of the 2013 International Symposium on Liquid Metal Processing & Casting, 145–50. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48102-9_22.

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Zang, Ximin, Zhouhua Jiang, Hua Song, Fubin Liu, Xin Deng, Xu Chen, and Chong Han. "A Study of Slag and Steel Leakage Influence Factors during Electroslag Remelting Withdrawing Process." In Proceedings of the 2013 International Symposium on Liquid Metal Processing and Casting, 119–22. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118830857.ch17.

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Patel, Ashish, David W. Tripp, and Daniel Fiore. "Application of a Model for Simulating the Vacuum Arc Remelting Process in Titanium Alloys." In Proceedings of the 2013 International Symposium on Liquid Metal Processing and Casting, 239–44. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118830857.ch35.

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Conference papers on the topic "Remelting process":

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Derouet, H., L. Sabatier, F. Coste, and R. Fabbro. "Process control applied to laser surface remelting." In ICALEO® ‘97: Proceedings of the Laser Materials Processing Conference. Laser Institute of America, 1997. http://dx.doi.org/10.2351/1.5059666.

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Fu, Yunchang, Dongxiong Ling, Bruno Martin, and Junchang Li. "Finite-element modeling of laser remelting process." In Photonics Asia 2002, edited by ShuShen Deng, Tatsuo Okada, Klaus Behler, and XingZong Wang. SPIE, 2002. http://dx.doi.org/10.1117/12.482911.

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Song, Jin-chun, Li-li Zhao, and Hong-yi Liu. "State Estimate Based on Nonlinear Filter of ElectroSlag Remelting Process." In 2008 Pacific-Asia Workshop on Computational Intelligence and Industrial Application (PACIIA). IEEE, 2008. http://dx.doi.org/10.1109/paciia.2008.12.

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Ahn, Seokyoung, Joseph J. Beaman, Rodney L. Williamson, and David K. Melgaard. "Model-Based Control of Electroslag Remelting Process Using Unscented Kalman Filter." In ASME 2008 Dynamic Systems and Control Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/dscc2008-2148.

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Electroslag Remelting (ESR) is used widely throughout the specialty metals industry. The process generally consists of a regularly shaped electrode that is immersed a small amount in liquid slag at a temperature higher than the melting temperature of the electrode. Melting droplets from the electrode fall through the lower density slag into a liquid pool constrained by a crucible and solidify into an ingot. High quality ingots require that electrode melt rate and immersion depth be controlled. This can be difficult when process conditions are such that the temperature distribution in the electrode is not at steady state. A new method of ESR control has been developed that incorporates an accurate, reduced-order melting model to continually estimate the temperature distribution in the electrode. The ESR process is highly nonlinear, noisy, and has coupled dynamics. An extended Kalman filter and an unscented Kalman filter were chosen as possible estimators and compared in the controller design. During the highly transient periods in melting, the unscented Kalman filter showed superior performance for estimating and controlling the system.
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Song, Jin-chun, Li-li Zhao, and Hong-yi Liu. "Optimizing cooperative control based on genetic algorithm for electroSlag remelting process." In 2008 IEEE Conference on Cybernetics and Intelligent Systems. IEEE, 2008. http://dx.doi.org/10.1109/iccis.2008.4670764.

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Haferkamp, H., M. Goede, and O. Thürk. "Short Time Process Observation During Laser Remelting of Aluminium Diecast Alloys." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cthh93.

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Rapid solidification of aluminium alloys during the remelting process using high power laser radiation results in refining effects of the solidified grain texture and improved wear resistance and material hardness. High temperature gradients can be achieved as well as energy coupling into the aluminium alloy is locally restricted, and can be precisely controlled. For the adjustment of defined grain textures, the dynamic behaviour of the melted material on the irradiated material surface is of high interest. Most of the optical set-ups currently used for process visualisation only image the plasma formation within the laser beam interaction zone. Available systems for frequency-selective irradiation and visualisation provide insufficient time resolutions with respect to rapid melting and solidifying processes.
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Camila Almeida Martins and Jhon Jairo Ramirez-Behainne. "THERMAL CYCLING SIMULATION DURING REMELTING PROCESS OF THE STEEL ASTM A743-CA6NM." In 23rd ABCM International Congress of Mechanical Engineering. Rio de Janeiro, Brazil: ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-1361.

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Liao, Jiankan, Ashvin Sharma, and Daniel Cooper. "The Effect of Composition, Geometry and a Novel Tool Design on Metal Recovery During Aluminum Process Scrap Remelting." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-84900.

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Abstract Aluminum recycling requires less energy and releases fewer greenhouse emissions than primary production from naturally occurring ores; however, a significant fraction of the furnace charge is lost to dross generation during remelting. In this article, we use an electric furnace to remelt clean aluminum sheet and machining chip process scrap of varying thickness, surface roughness, and composition. The metal recovery results show that magnesium-containing alloys (e.g., 2xxx, 5xxx, 6xxx, and 7xxx alloys) accelerate dross generation and lower metal recovery. This is likely due to magnesium having a higher reactivity than aluminum, with the magnesium content detected in the dross (using Energy-dispersive X-ray spectroscopy) greater than the magnesium content in the alloy. Metal recovery decreased when remelting thinner scrap. Metal recovery for clean machining chips was lower than for aluminum sheet scrap of the same thickness and composition. This disparity was likely due to the greater surface roughness of the machining chips, which will increase the surface area for oxidation and potentially the wetting of the oxide by the Wenzel effect. The decreased metal recovery for scratch brushed aluminum sheets confirmed the effect of surface roughness. Subsequently, a “squeeze” cutting tool was designed and manufactured, which smooths the otherwise rough back-side of the machining chips. These smoother machining chips exhibited increased metal recovery during remelting.
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Tian, Zongjun, Lida Shen, Zhidong Liu, and Yinhui Huang. "Microstructure Characteristics and High-Temperature Oxidation Behavior of Plasma-Sprayed and Laser-Remelted MCrAlY Coatings on TiAl Intermetallics." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50145.

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In order to further improve the high-temperature oxidation resistance of TiAl intermetallic alloys, MCrAlY coatings were fabricated by plasma spraying and plasma spraying-laser remelting technologies. The microstructures of the as-sprayed and laser-remelted MCrAlY coatings were studied. In addition, the oxidation behaviors at 850 °C for three samples were investigated. One sample is the matrix of TiA1 intermetallic alloys, the other one is processed by plasma-spraying MCrAlY coatings, and the third one is processed by plasma-spraying and laser-remelting MCrAlY coatings. It was revealed that the oxidation resistance of TiAl intermetallics is weak due to lack of protection of Al2O3 film formed on the surface. The plasma-sprayed MCrAlY coatings have better oxidation resistance than the TiAl intermetallics although the plasma-sprayed MCrAlY coatings have high density of porosity and a typical layered structure. It is demonstrated that most of the holes can be eliminated by laser remelting, leading to the best oxidation resistance of the third sample with the laser-remelted coatings. The high oxidation resistance of the laser-remelted coatings is mainly attributed to three aspects: firstly, an Al enriched zone on the coating surface is formed during laser remelting, which is transformed into a protective Al2O3 film during oxidation process. Secondly, laser remelting eliminates most of the defects in plasma-sprayed coatings and enhances its density, thus decreases the channel of oxidation diffusion in high temperature oxidation process. Thirdly, rapid cooling of laser remelting results in a grain refinement and a preferred oxidation of Al at the initial stage, leading to a reduction of oxidation rate.
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Tanno, M., K. Ogawa, T. Shoji, S. O. Chwa, and A. Ohmori. "Improvement of Bond Strength of Thermal Barrier Coatings by a Laser Remelting Process." In ITSC2004, edited by Basil R. Marple and Christian Moreau. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.itsc2004p1076.

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Abstract In order to improve the efficiency of gas turbines, thermal barrier coatings (TBCs) have been applied to components in the hot sections of advanced gas turbines. During service, thermally grown oxide (TGO), which consists of an Al2O3 layer and a mixed oxide layer, forms at the interface between the top coating and bond coating. It is supposed that the reason for failures of TBCs, such as cracking, delamination or spalling, is due to decreased bond strength caused by TGO growth or due to the formation of stress concentration sites caused by porosities in the mixed oxide. In this study, to inhibit the growth of TGO, plasma sprayed CoNiCrAlY bond coating was remelted with a YAG laser prior to spraying the top coating. A thin Al2O3 layer formed at the top coating/bond coating interface, and the formation of porous mixed oxide during thermal aging tests was inhibited. Four-point bending tests showed that the bond strength of TBC with remelted CoNiCrAlY was superior to standard TBC.

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