Relevant bibliographies by topics / Solidification defects

Contents

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

Academic literature on the topic 'Solidification defects'

Author: Grafiati
Published: 8 June 2024
Last updated: 31 July 2025

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Journal articles on the topic "Solidification defects"

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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.

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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
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Nan, Hong Yan, Li Lin Chen, Guo Fa Mi, and Jiao Ma. "Application of Numerical Simulation and Optimization on Tensioner Pulley Bracket." Advanced Materials Research 529 (June 2012): 186–89. http://dx.doi.org/10.4028/www.scientific.net/amr.529.186.

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This article is about casting process of tensioner pulley bracket, which includes solidification simulation, mould filling simulation and defect forecast, using ViewCast software. The scale and location of the shrinkage defects were shown in simulation results. Solidification results demonstrated that the casting defects were not eliminated by the casting technology. The optimized scheme was obtained by replacing and adding chills. The optimization scheme was calculated and the simulation results shown that the reasonable casting process was obtained and the process has been proofed by the pro
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Mooraj, Shahryar, Jiaqi Dong, Kelvin Y. Xie, and Wen Chen. "Formation of printing defects and their effects on mechanical properties of additively manufactured metal alloys." Journal of Applied Physics 132, no. 22 (2022): 225108. http://dx.doi.org/10.1063/5.0132137.

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Printing defects are known to degrade the performance of additively manufactured (AM) alloys. Thus, a thorough understanding of their formation mechanisms and effects on the mechanical properties of AM materials is critically needed. Here, we take CoCrFeNi high-entropy alloy as a model material and print this alloy by laser powder bed fusion over a wide range of printing conditions. We reveal the processing windows for the formation of different printing defects including lack of fusion (LOF), keyhole, and solidification cracking. LOF and keyholes can be well correlated with insufficient and e
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Meshram, Suresh, and Madhusudhan Reddy. "Influence of Tool Tilt Angle on Material Flow and Defect Generation in Friction Stir Welding of AA2219." Defence Science Journal 68, no. 5 (2018): 512–18. http://dx.doi.org/10.14429/dsj.68.12027.

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Heat treatable aluminium alloy AA2219 is widely used for aerospace applications, welded through gas tungsten and gas metal arc welding processes. Welds of AA2219 fabricated using a fusion welding process suffers from poor joint properties or welding defects due to melting and re-solidification. Friction stir welding (FSW) is a solid-state welding process and hence free from any solidification related defects. However, FSW also results in defects which are not related to solidification but due to improper process parameter selection. One of the important process parameters, i.e., tool tilt angl
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Yu, J. K., Q. Yan, and Pin Yang Fang. "Solidification of Aluminum Infiltrated Composites." Materials Science Forum 475-479 (January 2005): 901–4. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.901.

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The solidification and defects of Al/SiC and Al/C composites were investigated by directional solidification techniques. The solidification and defects of Al/SiC composites are greatly influenced by temperature gradients, solidification rates, the size of SiC particles and the chemical composition of magnesium, but slightly by the volume fraction of SiC particles and the chemical composition of silicon. The solidification shrinkage feeding of Al/C composites is greatly improved by hybridizing carbon fiber bundles with 3 vol% of SiC particles. A model of the solidification feeding was proposed
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Huo, Miao, Chuyue Chen, Hangyue Jian, Wenchao Yang, and Lin Liu. "The Stray Grains from Fragments in the Rejoined Platforms of Ni-Based Single-Crystal Superalloy." Metals 13, no. 8 (2023): 1470. http://dx.doi.org/10.3390/met13081470.

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Nickel-based single crystal superalloy is the most important material for blade preparation. However, some solidification defects inevitably occur during the process of preparing single-crystal blades through directional solidification. In this study, in order to study the origin of misorientation defects during solidification, a model with rejoined platforms was designed according to the geometry of single-crystal guide vanes. Electron Back-Scattering Diffraction (EBSD) was used to quantify the orientation deviation of the dendrites and identify the solidification defects in the rejoined plat
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Deyun, Liu, Li Yunyue, Zhao Mingyuan, Sheng Lanbing, and Shen Yuanxun. "Research on typical defects of Cu/Fe dissimilar metals vacuum welding-brazing and improvement measures." Journal of Physics: Conference Series 2959, no. 1 (2025): 012010. https://doi.org/10.1088/1742-6596/2959/1/012010.

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Abstract Cu/Fe dissimilar metals are joined by welding-brazing in a vacuum furnace, and then typical defect formation mechanisms of the post-welded joints are observed and analyzed. As a result, it has been found that the major welding-brazing defects are elemental segregation, solidification cracks and poor fusion. It is worth noting that the causes of element segregation and slag inclusion are related to high welding-brazing temperature, impurity of raw materials, inadequate cleaning of materials before welding-brazing and volatilization of impurity metals in the chamber of the vacuum furnac
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Korojy, B., L. Ekbom, and H. Fredriksson. "Microsegregation and Solidification Shrinkage of Copper-Lead Base Alloys." Advances in Materials Science and Engineering 2009 (2009): 1–9. http://dx.doi.org/10.1155/2009/627937.

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Microsegregation and solidification shrinkage were studied on copper-lead base alloys. A series of solidification experiments was performed, using differential thermal analysis (DTA) to evaluate the solidification process. The chemical compositions of the different phases were measured via energy dispersive X-ray spectroscopy (EDS) for the Cu-Sn-Pb and the Cu-Sn-Zn-Pb systems. The results were compared with the calculated data according to Scheil's equation. The volume change during solidification was measured for the Cu-Pb and the Cu-Sn-Pb systems using a dilatometer that was developed to inv
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Hassan, Mohamed Abubakr, Mahmoud Hassan, Chi-Guhn Lee, and Ahmad Sadek. "Monitoring Variability in Melt Pool Spatiotemporal Dynamics (VIMPS): Towards Proactive Humping Detection in Additive Manufacturing." Journal of Manufacturing and Materials Processing 8, no. 3 (2024): 114. http://dx.doi.org/10.3390/jmmp8030114.

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Humping is a common defect in direct energy deposition processes that reduces the geometric integrity of printed products. The available literature on humping detection is deemed reactive, as they focus on detecting late-stage melt pool spatial abnormalities. Therefore, this work introduces a novel, proactive indicator designed to detect early-stage spatiotemporal abnormalities. Specifically, the proposed indicator monitors the variability of instantaneous melt pool solidification-front speed (VIMPS). The solidification front dynamics quantify the intensity of cyclic melt pool elongation induc
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Zhang Tong, 田帅, 孙旭冉, 李日, and Li Ri. "Machine learning-based study of dynamic shrinkage behavior during solidification of castings." Acta Physica Sinica 74, no. 2 (2025): 0. https://doi.org/10.7498/aps.74.20241581.

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Shrinkage cavities and porosity are the main defects generated during the solidification process of castings. The cause of these defects is the contraction of the alloy during solidification, with the last regions to solidify not receiving effective compensation from liquid metal, resulting in cavitation defects. Shrinkage cavities and porosity significantly reduce the mechanical properties of castings and shorten their service life, thus necessitating appropriate process elimination measures. Utilizing numerical simulation technology can effectively predict the shrinkage of castings during so
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Dissertations / Theses on the topic "Solidification defects"

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Brewster, G. J. J. "Solidification and heat-treatment related defects in single crystal nickel-base superalloys." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596900.

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This thesis examines the causes of surface scale, surface inter-dendritic phase formation and surface melting. These effects hinder component inspection and lead to extensive rework operations and component scrap. Surface scale is a region of colouration observed on the external surface of cast components. It has been shown to occur in the solid-state and to result from the differential thermal contraction between the mould and metal, driving separation during the casting process. The regions of the casting that separate from the mould are exposed to the casting atmosphere, resulting in the fo
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Khalajzadeh, Vahid. "Modeling of shrinkage porosity defect formation during alloy solidification." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6155.

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Among all casting defects, shrinkage porosities could significantly reduce the strength of metal parts. As several critical components in aerospace and automotive industries are manufactured through casting processes, ensuring these parts are free of defects and are structurally sound is an important issue. This study investigates the formation of shrinkage-related defects in alloy solidification. To have a better understanding about the defect formation mechanisms, three sets of experimental studie
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Zareie, Rajani Hamid Reza. "Development of a three-dimensional multi-scale model to study the formation of solidification defects in fusion welding." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57601.

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One of the long-standing challenges in joining of aluminum alloys is the occurrence of solidification defects, i.e. hot cracking and porosity, since these defects significantly increase manufacturing costs. This research project investigates the formation of solidification defects through development of a novel and comprehensive 3-D multi-scale and multi-physics numerical study and then application to the GTA welding of the aluminum alloy AA6061. The developed multi-scale model is composed of four different modules: 1) Solidification, 2) Deformation, 3) Fluid flow, and 4) Defect formation. Th
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Lantreibecq, Arthur. "Détermination de la nature et de l'origine des défauts cristallins dans le silicium monolike." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30311/document.

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Le silicium monolike (ML), est un matériau obtenu par croissance dirigée sur des germes monocristallins et dédié aux applications photovoltaïque. Cette thèse se concentre sur la qualité structurale de ces cristaux de plusieurs centaines de kilogrammes et qui contiennent des défauts dont certains affectent particulièrement le rendement solaire. Le but est de comprendre les mécanismes d'apparition et de multiplication de ces défauts pour pouvoir à terme les inhiber. Comme le développement de sous-joints de grains (SJG), principaux responsables des pertes de rendements photovoltaïques, est potent
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Ouaddah, Hadjer. "Study of crystalline defects issued from silicon solidification : effect of impurities and correlation between crystallography, physicochemical and electrical properties." Electronic Thesis or Diss., Aix-Marseille, 2021. http://theses.univ-amu.fr.lama.univ-amu.fr/211214_OUADDAH_370ltw379yep573fxydon897z_TH.pdf.

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Une approche expérimentale incluant plusieurs techniques a été utilisée pour caractériser les défauts structuraux issus de la solidification, par imagerie X in situ, et par des techniques complémentaires ex situ pour caractériser la structure de grains, la qualité cristalline et la déformation. La composition et la ségrégation des impuretés ont été corrélées avec la caractérisation des défauts et les propriétés électriques. Les analyses montrent l'influence significative des impuretés légères et métalliques sur la solidification du silicium et sur les propriétés électriques. En présence d'impu
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Klein, Cândida Cristina. "Segregação de índio em cristais Ga1-xInxSb dopados com telúrio obtidos pelo método Bridgman vertical." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/147761.

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Os compostos semicondutores ternários, dentre eles o Ga1-xInxSb, têm sido objeto de interesse de pesquisadores e da indústria microeletrônica devido à possibilidade de ajuste da constante de rede, assim como a correspondente modificação da banda proibida de energia e do intervalo de emissão e absorção óptica, com a variação da fração molar de x. A flexibilidade destas propriedades estruturais torna este composto apropriado como substratos para epitaxias de outros compostos ternários e quaternários, na formação de mono e heterojunções. A maneira mais econômica para obtenção de substratos de mat
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Riberi-Béridot, Thècle. "In situ characterization by X-ray synchrotron imaging of the solidification of silicon for the photovoltaic applications : control of the grain structure and interaction with the defects and the impurities." Electronic Thesis or Diss., Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0412.

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Au cours de cette thèse, nous avons étudié in situ la solidification du silicium à l’aide de l'imagerie X-synchrotron. Les deux techniques utilisées lors de la solidification sont la radiographie et la diffraction de Bragg, elles permettent de caractériser: la dynamique des mécanismes de croissance, la cinétique de croissance, la nucléation et la compétition de grains, la déformation du réseau cristallin et les champs de contraintes liés aux dislocations. Ces observations sont combinées avec des caractérisations ex situ pour étudier l'orientation cristallographique, les déformations du réseau
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Castro, Roman Manuel de Jesús. "Étude expérimentale et modélisation de la solidification des pièces coulées en fonte à graphite spheroidal : influence de la vitesse de refroidissement et de l'inoculation." Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_CASTRO_ROMAN_M_J.pdf.

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La présente étude porte sur l'influence de la vitesse de refroidissement et du taux d'inoculation sur la structure de solidification des fontes à graphite sphéroïdal. Des modèles de simulation numérique de la solidification sont proposés. Des pièces comportant 5 cylindres de diamètres différents, instrumentés à l'aide de thermocouples, ont été coulées. Les courbes de refroidissement ont été dépouillées par analyse thermique directe et dérivée. La structure des cylindres a été caractérisée par analyse d'images : on a ainsi déterminé la densité surfacique de nodules, leur densité volumique, le t
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Riberi-Béridot, Thècle. "In situ characterization by X-ray synchrotron imaging of the solidification of silicon for the photovoltaic applications : control of the grain structure and interaction with the defects and the impurities." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0412/document.

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Au cours de cette thèse, nous avons étudié in situ la solidification du silicium à l’aide de l'imagerie X-synchrotron. Les deux techniques utilisées lors de la solidification sont la radiographie et la diffraction de Bragg, elles permettent de caractériser: la dynamique des mécanismes de croissance, la cinétique de croissance, la nucléation et la compétition de grains, la déformation du réseau cristallin et les champs de contraintes liés aux dislocations. Ces observations sont combinées avec des caractérisations ex situ pour étudier l'orientation cristallographique, les déformations du réseau
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Banos, Julien. "Modélisation du procédé de refusion à l’arc sous vide : Échanges thermiques et défauts de solidification." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0117.

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Le procédé de refusion à l'arc sous vide (Vacuum Arc Remelting ou VAR en anglais) est employé dans la production d'alliages métalliques à haute valeur ajoutée tels que les alliages de titane ou superalliages base nickel à destination de l'industrie aéronautique. La maîtrise des conditions de solidification constitue un enjeu industriel important pour obtenir des lingots d'une homogénéité chimique adéquate et dépourvus de défauts de solidification. Les travaux présentés dans ce document visent à améliorer la description des échanges thermiques dans un modèle du procédé VAR (SOLAR) et proposer u
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Books on the topic "Solidification defects"

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Campbell, F. C., ed. Metals Fabrication. ASM International, 2013. http://dx.doi.org/10.31399/asm.tb.mfub.9781627083089.

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Metals Fabrication: Understanding the Basics describes the practices, processes, and procedures used throughout industry to produce metal products and goods. It begins with a review of primary mill processes and the basic steps for making iron, steel, aluminum, and titanium. It then covers nearly every subsequent fabrication process, starting with casting followed by forging, forming, machining, heat treating, finishing, and coating as well as powder-metal part production. The book provides a thorough review of each process, discussing typical implementations, material requirements, design con
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Book chapters on the topic "Solidification defects"

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Perez, Nestor. "Solidification Defects." In Phase Transformation in Metals. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49168-0_10.

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Perez, Nestor. "Solidification Defects." In Phase Transformation in Metals. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-70634-9_10.

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Mashaal, M., and M. Amar. "Stationnary Cells in Directional Solidification." In Patterns, Defects and Materials Instabilities. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0593-1_13.

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Levine, Herbert. "Directional Solidification: Theoretical Methods and Current Understanding." In Patterns, Defects and Materials Instabilities. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0593-1_11.

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Cladis, P. E., J. T. Gleeson, and P. L. Finn. "New Instabilities in Directional Solidification of Succinonitrile." In Patterns, Defects and Materials Instabilities. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0593-1_12.

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Jamgotchian, H., R. Trivedi, and B. Billia. "Nonlinear Dynamics in Cellular Solidification in Presence of Defects." In Interactive Dynamics of Convection and Solidification. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2809-4_18.

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Saeedipour, Mahdi, Simon Schneiderbauer, Stefan Pirker, and Salar Bozorgi. "Prediction of Surface Porosity Defects in High Pressure Die Casting." In Advances in the Science and Engineering of Casting Solidification. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093367.ch19.

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Saeedipour, Mahdi, Simon Schneiderbauer, Stefan Pirker, and Salar Bozorgi. "Prediction of Surface Porosity Defects in High Pressure Die Casting." In Advances in the Science and Engineering of Casting Solidification. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48117-3_19.

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Sabau, Adrian S. "Modeling of Casting Defects in an Integrated Computational Materials Engineering Approach." In Advances in the Science and Engineering of Casting Solidification. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093367.ch28.

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Sabau, Adrian S. "Modeling of Casting Defects in an Integrated Computational Materials Engineering Approach." In Advances in the Science and Engineering of Casting Solidification. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48117-3_28.

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Conference papers on the topic "Solidification defects"

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Riffel, Kaue C., Igor J. Marques, Henry Leon-Henao, Antonio J. Ramirez, Steve McCracken, and Jonathan Tatman. "Computational Approach To Predict Solidification Cracking Susceptibility in Welding Filler Metals." In AM-EPRI 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0924.

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Abstract Solidification cracking (SC) is a defect that occurs in the weld metal at the end of the solidification. It is associated with the presence of mechanical and thermal stresses, besides a susceptible chemical composition. Materials with a high solidification temperature range (STR) are more prone to the occurrence of these defects due to the formation of eutectic liquids wetting along the grain boundaries. The liquid film collapses once the structure shrinks and stresses act during the solidification. Thus, predicting the occurrence of SC before the welding process is important to addre
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Etien, R. A., G. A. Young, T. E. Capobianco, J. V. Mullen, S. Leveillee, and P. C. Sander. "Development of a Corrosion Resistant and Highly Weldable Filler Metal for Use with Alloy 690." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08597.

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Abstract This paper reports on a long term research effort to develop an improved filler metal for gas-tungsten-arc welding (GTAW) of Alloy 690. The goal of this work was to maintain the corrosion resistance of wrought Alloy 690 while eliminating ductility dip cracking (DDC) or other as-welded defects in prototypical welds. Three candidate alloys of 24 wt.%, 27 wt.%, and 30 wt.% chromium have been evaluated for their stress corrosion cracking (SCC) resistance, weldability, mechanical properties, and phase stability. These alloys are compositionally similar to the Alloy 600 filler metal EN82 wi
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Imano, Shinya, Jun Sato, Koji Kajikawa, and Tatsuya Takahashi. "Mechanical Properties and Manufacturability of Ni-Fe Base Superalloy (FENIX-700) for A-USC Steam Turbine Rotor Large Forgings." In AM-EPRI 2007, edited by R. Viswanathan, D. Gandy, and K. Coleman. ASM International, 2007. https://doi.org/10.31399/asm.cp.am-epri-2007p0424.

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Abstract To develop 10-ton class forgings with adequate long-term strength and without segregation defects for A-USC steam turbine rotors, researchers modified the chemical composition of Alloy 706 to improve its microstructure stability and segregation properties. The modified Alloy, named FENIX-700, is a γ' phase strengthened alloy without a γ" phase, and its microstructure stability is superior to Alloy 706 at 700°C, as demonstrated by short-term aging tests and phase stability calculations using the CALPHAD method. A trial disk 1-ton class forging of FENIX-700 was manufactured from a doubl
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Gor, S., T. Hohlweck, D. Fritsche, et al. "Potential Use of Plasma Sprayed Heating Coatings in Die Casting and Injection Molding." In ITSC2022. DVS Media GmbH, 2022. http://dx.doi.org/10.31399/asm.cp.itsc2022p0220.

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Abstract In metal die casting as well as plastic injection molding, controlling the heat balance during the injection and solidification process can lead to fewer defects and a better component quality. An appropriate cooling channel design for the mold can help to control the solidification to a certain extent. But the heat control achievable by cooling channels is limited due to the high effective thermal mass, and therefore near-cavity energy input is of interest. In this paper, a simulation study is performed demonstrating the use of plasma sprayed ceramic coating as a heating coating at t
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Wielage, B., S. Steinhäuser, W. Milewski, and H. Pokhmurska. "Solidification of Detonation Sprayed Ceramic Coating Melted by CO2 Laser." In ITSC2002, edited by C. C. Berndt and E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2002. http://dx.doi.org/10.31399/asm.cp.itsc2002p1020.

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Abstract This paper investigates the effect of laser treatment on alumina-TiO2 coatings deposited by detonation spraying. It describes the changes observed in the microstructure and hardness of the remelted layers. The originally lamellar structure is transformed into a fine, pore-free columnar structure in which the grains are oriented perpendicular to the interface between the layer and substrate. The remelted zones contain alpha-aluminum oxide as the main phase and are characterized by high microhardness, although a few defects were observed on the periphery. Paper includes a German-languag
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Ghosh, S., and J. Choi. "Three-Dimensional Transient Finite Element Analysis for Microstructure Formation and Residual Stresses in Laser-Aided DMD Process." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56359.

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Despite immense advances in Laser-Aided Direct Material Deposition process, many issues concerning the adverse effects of process parameters on the stability of variety of properties and the integrity of microstructure have been reported. Macroscopic aspects are important in predicting macroscopic defects or optimizing process conditions, while microstructural features such as phase appearance, morphology, grain size, spacing, or micro-defects are certainly no less important in determining the ultimate properties of the solidified product. Traditional solidification theories as applied to cast
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Rakita, Milan, and Qingyou Han. "Simulation of Solidification Defects for Prediction of Dross Formation in Aluminum 5182 Remelt Secondary Ingot." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84160.

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In aluminum recycling about 4% on average is lost on oxidation and dross. However, large percent of remelt secondary ingots (RSI) produce much more dross after remelting. It is rather surprising that no dross can be detected in the RSI, but after remelting some parts of apparently ‘healthy’ aluminum can give up to 80% of dross. This raises question how dross gets formed. Recent research proposes that the formation of dross after remelting of the RSI is closely related to the solidification process in the ingot, specifically the formation of shrinkage porosity, hydrogen porosity, and hot tearin
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Wang, W. B., X. H. Yang, Q. C. Zhang, and T. J. Lu. "Solidification Analysis of Density-Graded Closed-Cell Metallic Foam Under Constant Temperature Boundary Condition." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6719.

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In the industrial fabrication processes of density-graded closed-cell metallic foams, it is of great importance to control the solidification immediately after foams are formed so as to obtain the final products with well distributed density-graded pores and less defects. This paper presented an analytical work aiming to predict the solidification front of density-graded metallic foam under constant temperature boundary condition. Numerical simulations based on ideal density-graded circular pores demonstrated good agreement with the analytical solutions. The 2D porous morphology of a real dens
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Zhou, J., H. L. Tsai, and P. C. Wang. "Transport Phenomena and Defect Formation in Laser Welding of Zinc-Coated Steels." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59286.

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Zinc-coated steels are used extensively in the auto industry because they are inexpensive, durable and have high corrosion resistance. Lasers are being used to weld zinc-coated steels due to high welding speed, small seam and narrow heat affected zone. However, it is difficult to laser weld lap-joint zinc-coated steel sheets under a very small gap condition between the metal interfaces since there is a considerable amount of zinc vapor generated. This vapor must be vented out; otherwise it will be trapped in the weld pool leading to different welding defects, such as large voids at the tip of
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10

Hossain, Md Shahjahan, Russell Krenek, Hossein Taheri, and Fadwa Dababneh. "Ultrasonic Phased Array Technique for Defect Detection and Sizing in Heavy-Walled Cast Components." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23319.

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Abstract Cast metal parts are extensively found in many engineering products such as pump casing and engines. Thermal effects exhibited during metal casting processes, such as solidification can generate defects in the cast components. Effective nondestructive testing (NDT) for detection and sizing of defects in cast parts prevents extra cost and time associated with repair and maintenance. Surface-breaking cracks and porosity are among the common types of defects in large cast components. There are several limitations in using conventional NDT methods for as built cast parts due to surface co
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Reports on the topic "Solidification defects"

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Asta, M. D., S. H. Davis, D. N. Seidman, et al. Defects Associated with Solidification of Melt-Processed Superalloys for the Aerospace Industry. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada501481.

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