Bibliografías temáticas / DAS (dendrite arm sparing)

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Literatura académica sobre el tema "DAS (dendrite arm sparing)"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 14 de febrero de 2022

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Artículos de revistas sobre el tema "DAS (dendrite arm sparing)"

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Japan Institute Of Light Metals, Co. "Measurement of dendrite arm spacing." Journal of Japan Institute of Light Metals 38, no. 1 (1988): 54–60. http://dx.doi.org/10.2464/jilm.38.54.

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Yuan, Xun Feng, and Yan Yang. "Flow Velocity Affecting Dendrite Growth of Fe-C Alloy." Advanced Materials Research 785-786 (September 2013): 1009–12. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.1009.

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The phase field model coupling with the concentration field and flow field is used to simulate the dendrite growth during isothermal solidification of Fe-C alloy in a forced flow. The effects of flow velocity on the dendrite growth are studied. The results indicate that with introducing the forced flow, the upstream secondary dendrite arm space decreases, the downstream secondary dendrite arm space increases. As flow velocity increases, the side branch at the upstream regions become bulky and tilt, the side branch at the downstream regions degenerated and even disappear, the length of upstream
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3

Zhao, Long Zhi, Xin Yan Jiang, Ming Juan Zhao, and Jian Zhang. "Phase-Field Simulation of Dendrite Growth of Magnesium Alloy under Non-Isothermal Solidification." Advanced Materials Research 848 (November 2013): 231–35. http://dx.doi.org/10.4028/www.scientific.net/amr.848.231.

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The phase-field model was built by coupling with the concentration field and temperature field,The dendrite growth process of Magnesium alloy was simulated under the different anisotropic strength and different undercooling.The results show that with the enlarge of anisotropic strength, dendritic morphology change from seaweed-like to snow-like, trunk grows along the optimal direction,and the secondary dendrite arm grow along the most optimize direction as well; With undercooling increasing, the more coarse primary dendrite arm, the more developed secondary dendrite arm, dendrites around the t
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4

Park, Sang Han, Hisao Esaka, and Kei Shinozuka. "Equalization of Primary Dendrite Arm Spacing during Growth of Columnar Dendrite." Journal of the Japan Institute of Metals 76, no. 3 (2012): 197–202. http://dx.doi.org/10.2320/jinstmet.76.197.

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Mortensen, A. "On the rate of dendrite arm coarsening." Metallurgical Transactions A 22, no. 2 (1991): 569–74. http://dx.doi.org/10.1007/bf02656824.

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Sakamoto, Tatsuaki, Shu Chen Sun, Takuya Matsumoto, et al. "Microstructure and Mechanical Property in Cast AZ91 Magnesium Alloy with Y Addition." Materials Science Forum 783-786 (May 2014): 472–77. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.472.

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Microstructures and Vickers microhardness in AZ91 magnesium alloys without and with 1mass%Y addition fabricated by casting were investigated. Vickers microhardness increases with adding 1%Y. Microstructure in AZ91 without Y addition was analyzed to contain mainly α-Mg and Mg17Al12by X-ray diffraction. Microstructural observations with optical, scanning and transmission electron microscopes show that microstructure consists of α-Mg dendrite, non-equilibrium eutectic Mg17Al12and lamellar Mg17Al12. The non-equilibrium eutectic Mg17Al12exists between α-Mg dendrites. The lamellar Mg17Al12forms near
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7

Yan, Qing Song, Xun Zou, Bo Wen Xiong, Gang Lu, Shou Yin Zhang, and Chang Chun Cai. "Effect of Solidification Pressure on Secondary Dendrite Arm Spacing of Aluminum Alloy." Applied Mechanics and Materials 117-119 (October 2011): 1522–25. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.1522.

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The solidification pressure is one of the most important factors in the counter-gravity casting process. Through testing and analyzing the microstructures of aluminum alloy castings under different solidification pressure, the effect of different solidification pressure on the secondary dendrite arm spacing and grain size is studied. The results show that with the increase of the solidification pressure, the secondary dendrite arm spacing and the grain size of aluminum alloy decreases. When the solidification pressure is 250 KPa, the secondary dendrite arm of aluminum alloy is thick, the SDAS
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Vázquez-López, C., A. Calderón, M. E. Rodríguez, et al. "Influence of dendrite arm spacing on the thermal conductivity of an aluminum-silicon casting alloy." Journal of Materials Research 15, no. 1 (2000): 85–91. http://dx.doi.org/10.1557/jmr.2000.0016.

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The photoacoustic technique and the thermal relaxation method were used to determine the thermal conductivity of some representative samples obtained from an aluminumsilicon casting alloy A319. This material was solidified with an imposed unidirectional thermal gradient to obtain samples with different microstructures characterized by the secondary dendrite arm spacing, which increases as the solidification rate decreases. It was found that the thermal conductivity of the alloy decreases with an increase in the secondary dendrite arm spacing and a decrease in the integral dendrite perimeter.
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Zhu, Zhuang Qing, Fu Sheng Pan, Chong Zhao, and Yao Bo Hu. "Effect of Calcium and Strontium on Microstructure of AZ31 Wrought Magnesium Alloys." Materials Science Forum 686 (June 2011): 30–39. http://dx.doi.org/10.4028/www.scientific.net/msf.686.30.

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AZ31 wrought alloys at as-cast state with different microcontent calcium and strontium was studied by optical microscopy, X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. The study shows that the primary dendrite spacing and the secondary dendrite arm spacing can be refined significantly by Ca or Sr element. At 0.5wt.% Sr and 1.8wt.% Ca, the best refinement effect is fulfilled, its primary dendrite spacing and secondary dendrite arm spacing decreased from 292μm to 87μm. The Al4Sr intermetallic compound is observed at grain boundaries When Sr was added. The
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Yang, Chun Mei, Ding Fei Zhang, Pei Dao Ding, Jian Peng, and Xu Hong Chen. "Effects of Cooling Rate on Solidification Microstructure of ZK60 Magnesium Alloy." Materials Science Forum 488-489 (July 2005): 295–98. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.295.

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In this paper, the influence of the cooling rate on the solidified structure of ZK60 Mg alloy has been studied by means of Gleeble-1500D thermal simulation instrument. The result showed that the grain size and grain shape depended on the cooling rate, Primary Dendrite Arm Space ( λI ) and Secondary Dendrite Arm Space ( λII) sharply decreased with the increasing of solidifying cooling rate (v) in the range of experimental cooling rate (0.2~100K/s). When superheat was constant, the empirical formulas of the relation between λI λII and v was obtained. In addition, the dependence between micro-har
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Tesis sobre el tema "DAS (dendrite arm sparing)"

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Rýdel, David. "Tlakově lité odlitky z Al slitin - trendy vývoje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228046.

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The objective of this diploma thesis is to state the influence of porosity, DAS and shape factor on mechanical characteristics for the cast transmission cover made in Kovolit Modrice a.s.Which was molten from AlSi9Cu3. It was used an imaging software (Olympus Five) for classification of metallographical structures.
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2

Charbonnier, A. (Alain). "Secondary dendrite ARM spacing determination in Al-Si casting alloys by conductivity measurements." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60694.

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Al-Si-Mg alloys containing 7% silicon are the most widely used aluminum foundry alloys owing to their good mechanical properties and excellent castability. Nevertheless, design engineers traditionally apply a design casting factor when designing cast components to ensure that proper strength will be obtained in spite of the recent emergence of techniques of control of the molten alloy quality on which depend, afterwards, the mechanical properties of the castings.<br>In this study, the feasibility of using electrical conductivity to non-destructively predict secondary dendrite arm spacing was i
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3

Šolc, Petr. "Využití simulace pro predikci vad a hodnocení odlitků z Al slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228155.

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The aim of this work is comparing three casting process simulation programs for porosity and microstructure prediction capabilities for die-casting. After confronting these results with experimentally measured data taken from real castings it could be said that simulation is pretty accurate for DAS microstructure prediction and hot-spot areas. Amount of measured porosity could not be compared with predicted values because specimens were not taken from the exact hot-spot areas.
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4

Tran, Tu Anh. "Modelling and experimental study of secondary dendrite arm spacing and micro-segregation in continuously cast high carbon bloom steel." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/5635/.

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Smillie, Matthew John. "Casting and Analysis of Squeeze Cast Aluminium Silicon Eutectic Alloy." Thesis, University of Canterbury. Mechanical Engineering, 2006. http://hdl.handle.net/10092/1086.

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Squeeze casting is the practise of solidifying metals under mechanically applied pressure via a slow displacement of a die volume. It has been shown that squeeze casting enhances the mechanical properties of cast metals. Research into other high integrity casting processes has shown that using techniques that enhance melt quality can further increase the mechanical properties. Therefore a bottom-tapped, bottom-fed squeeze casting machine was designed and built around a pre-existing squeeze casting die designed for uniaxial pressure application. This was used to obtain quantitative metallurgica
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6

Angart, Samuel Gilbert. "Microstructure Analysis Of Directionally Solidified Aluminum Alloy Aboard The International Space Station." Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/595975.

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This thesis entails a detailed microstructure analysis of directionally solidified (DS) Al-7Si alloys processed in microgravity aboard the International Space Station and similar duplicate ground based experiments at Cleveland State University. In recent years, the European Space Agency (ESA) has conducted experiments on alloy solidification in microgravity. NASA and ESA have collaborated for three DS experiments with Al- 7 wt. % Si alloy, aboard the International Space Station (ISS) denoted as MICAST6, MICAST7 and MICAST12. The first two experiments were processed on the ISS in 2009 and 2010.
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Figueiredo, Arlan Pacheco. "Análise da solidificação de ligas de magnésio para aplicação na fabricação de motores." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/15394.

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Magnésio e suas ligas têm adquirido importância cada vez mais significativa como material estrutural de peso leve despertando um singular interesse pela indústria uma vez que oferece a melhor relação peso/resistência entre os metais. Os campos mais conhecidos de sua aplicação consistem na construção de veículos, na aeronáutica, manipulação industrial (robôs, automatização) e tecnologia de comunicação. Em particular, a indústria automobilística tem crescentemente ampliado a utilização de ligas de magnésio na produção de peças que vão desde caixas de câmbio até aros de rodas. As principais razõe
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8

Lee, Yousub. "Simulation of Laser Additive Manufacturing and its Applications." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1440360229.

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Fabian, Robert. "The influence of microstructural features on the mechanical properties of Magsimal®-59." Thesis, Jönköping University, Tekniska Högskolan, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-51943.

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Otremba, Maik. "Standardisierungsaspekte bei der Gießtechnologieauswahl von Zylinderköpfen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-163862.

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Für den Zylinderkopf ist das Schwerkraftgießen ein etabliertes Gießverfahren. Jedoch gehen die Gießereien in der Ausführung des Schwerkraftgusses unterschiedlich vor. Durch die mannigfaltigen Anschnittsysteme und die sich dadurch ergebenden Vor- bzw. Nachteile bei der Herstellung entstehen Unterschiede bei Qualität und Kosten. Ziel dieser Arbeit ist es, Standards und Vereinheitlichungen während der Produktentstehung eines Zylinderkopfes zu etablieren, um eine gleichbleibende Qualität der Zylinderköpfe in den Gießereien zu gewährleisten. Dazu sind vielfältige Ansatzpunkte zu verfolgen. Eine Mö
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Capítulos de libros sobre el tema "DAS (dendrite arm sparing)"

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Mo, Haisheng, Shuai Luo, Tao Yu, et al. "Secondary Dendrite Arm Spacing Study of Partition in Aluminumalloy Cylinder Heads." In Proceedings of SAE-China Congress 2015: Selected Papers. Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-978-3_13.

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2

Turkeli, Altan. "Approximate Analytical Models for Microsegregation Considering the Effect of Dendrite Arm Coarsening." In Materials Science Forum. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-991-1.449.

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Liu, Kai, Shusen Cheng, Jipeng Li, Yongping Feng, Ming Zou, and Jian Xie. "Study on the Dendrite Arm Spacing of S50C Steel Produced by CSP." In TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36296-6_107.

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4

Mohapatra, S. P., S. Nanda, and A. Palchowdhury. "Effect of Cooling Water Quality on Dendrite Arm Spacing of DC Cast Billets." In Light Metals 2011. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118061992.ch119.

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Turkeli, Altan. "Simple Analytical Models for Dendrite Arm Coarsening under High and Medium Temperature Gradients." In Materials Science Forum. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-991-1.331.

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Mohapatra, S. P., S. Nanda, and A. Palchowdhury. "Effect of Cooling Water Quality on Dendrite Arm Spacing of DC Cast Billets." In Light Metals 2011. Springer International Publishing, 2011. http://dx.doi.org/10.1007/978-3-319-48160-9_119.

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Jia, Zhengfeng, Tao Liu, Qingqiang Zeng, Huibin Qing, and Huixian Shen. "Mechanical Properties Research on Cylinder Head Based on Simulation of Secondary Dendrite Arm." In Lecture Notes in Electrical Engineering. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9718-9_39.

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Soldevilla, Natalia, and Oscar Caballero. "Correlation of Secondary Dendrite ARM Spacing with the Mechanical Behaviour of Cast 718 Alloy." In 8th International Symposium on Superalloy 718 and Derivatives. John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781119016854.ch59.

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9

Rappaz, M., A. Jacot, and W. J. Boettinger. "Last Stage Solidification of Alloys: A Theoretical Study of Dendrite Arm and Grain Coalescence." In Lecture Notes in Computational Science and Engineering. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-07969-0_16.

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Vergnano, Alberto, Umberto Bergamini, Daniele Bianchi, Paolo Veronesi, Roberto Spagnolo, and Francesco Leali. "Simulation and Experimental Validation of Secondary Dendrite Arm Spacing for AlSi7Mg0.3 Chassis Parts in Low Pressure Die Casting." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_6.

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AbstractThe structural properties of cast aluminum parts are strongly affected by the solidification in the production process. The solidification dynamics determines the Secondary Dendrite Arm Spacing (SDAS), directly affecting the structural strength of the alloy. Simulation techniques enable the integrated design of chassis parts and their production equipment. However, in order to effectively predict the SDAS formation, the simulation models need to be investigated and calibrated. The present research investigates the SDAS formation models and identifies a robust relation to be used in Design by Simulation phases for AlSi7Mg0.3 parts.
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Actas de conferencias sobre el tema "DAS (dendrite arm sparing)"

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Putta, Ramesh N., and Malur N. Srinivasan. "Mathematical Model of Solidification in Continuous Cast Low Carbon Steel Billets." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12303.

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This paper describes the relation between the Secondary Dendrite Arm Spacing (SDAS), Area of Mushy Zone with the Continuous Casting variables in low carbon steels during the solidification process in the mold zone. A Finite Element analysis of the heat flow equation, coupled with the solute distribution model and the dendrite growth model, enables the determination of the Secondary Dendrite Arm Spacing (SDAS). The CONBCAST.FOR program is developed in this work to analyze effects of process variables on the Secondary Dendrite Arm Spacing (SDAS), Area of Mushy Zone and Volume of the Bleed. Effor
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2

Serbino, Edison Marcelo, Jairo C\adndido, and Ely Roberto Benedicto. "Secondary Dendrite Arm Spacing Refining in Cylinder Heads by Low Pressure Die Casting Process." In SAE Brasil 2011 Congress and Exhibit. SAE International, 2011. http://dx.doi.org/10.4271/2011-36-0004.

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Zhang, Bingrong, Maurizio Garro, Marco Leghissa, Angelo Giglio, and Costanzo Tagliano. "Effect of Dendrite Arm Spacing on Mechanical Properties of Aluminum Alloy Cylinder Heads and Engine Blocks." In SAE 2005 World Congress & Exhibition. SAE International, 2005. http://dx.doi.org/10.4271/2005-01-1683.

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Karmakar, Nilankan, Pankaj Jha, Sudipto Ray, et al. "Prediction of Secondary Dendrite Arm Spacing in Directional Solidification of Aluminum Alloy by Casting Simulation and Micro-Structural Inspection." In Symposium on International Automotive Technology 2019. SAE International, 2019. http://dx.doi.org/10.4271/2019-26-0166.

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Tan, Wenda, Neil S. Bailey, and Yung C. Shin. "Numerical Modeling of Transport Phenomena and Dendritic Growth in Laser Conduction Welding of 304 Stainless Steel." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50219.

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A multi-scale model is developed to investigate the heat/mass transport and dendrite growth in laser spot conduction welding. A macro-scale transient model of heat transport and fluid flow is built to study the evolution of temperature and velocity field of the molten pool. The molten pool geometry and other solidification parameters are calculated, and the predicted pool geometry matches well with experimental result. On the micro-scale level, the dendritic growth of 304 stainless steel is simulated by a novel model that has coupled the Cellular Automata (CA) and Phase Field (PF) methods. The
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6

Kavousi, Sepideh, and Dorel Moldovan. "Phase Field Modeling of Solidification in Single Component Systems." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71921.

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Using phase field modeling simulation approach we investigate the effect of various parameters on the primary and secondary dendrite arm spacing during directional solidification in a single component system. In previous studies the effect of temperature gradient was assumed to be negligible in the transversal directions with a temperature rate equal to the product of thermal gradient and solidification rate. In our study the temperature field is obtained from energy conservation equation by considering the balance of latent heat released in the regions where solidification occurs and energy d
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7

Hu, Xuefei, John W. Sutherland, and James M. Boileau. "Characterizing the Effect of 319 Aluminum Microstructure on Machinability: Part 1 — Model Development." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79653.

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This two-part paper is directed at the development of a machining force model that addresses key microstructural features of 319 Aluminum. In Part 1 of this paper, a machining force model is presented that incorporates microstructural effects. Secondary Dendrite Arm Spacing (SDAS) is identified as a significant microstructure feature of 319 aluminum in terms of machinability, and the SDAS is related to the solidification rate. A new material constitutive relationship that incorporates SDAS microstructure effects is proposed. In Part 2 of this paper, the results from material tests and machinin
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Hu, Xuefei, John W. Sutherland, and James M. Boileau. "Characterizing the Effect of 319 Aluminum Microstructure on Machinability: Part 2 — Model Validation." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79654.

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In Part 1 of this paper, a machining force model was developed based on an enhanced version of Zheng’s Continuum Mechanics model that incorporates microstructural effects. Machining experiments identified Secondary Dendrite Arm Spacing (SDAS) as a significant microstructure feature of 319 aluminum in terms of machinability. A new material constitutive relationship that incorporates SDAS microstructure effects on the flow stress was proposed. In this part of the paper, disk turning tests are performed to simulate the orthogonal cutting process. The cutting forces obtained from some of these tes
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9

Batra, Ankit. "Clinical comparison of toxicity pattern of two linear quadratic model-baesd fractionation schemes of high-dose-rate intracavitary brachytherapy for cervical cancer." In 16th Annual International Conference RGCON. Thieme Medical and Scientific Publishers Private Ltd., 2016. http://dx.doi.org/10.1055/s-0039-1685255.

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Introduction: Carcinoma cervix is the fourth (GLOBACON 2012) most common cancer among women worldwide, and the main cancer affecting women in Sub-Saharan Africa, Central America and south-central Asia. In India, approx. 1,23,000 (GLOBACON 2012) new cases of carcinoma cervix are diagnosed each year. Brachytherapy is an integral part of treatment of cancer cervix. In the context of a developing country like us where maximum utilization of the resource is of prime importance to provide treatment to the large patient cohort, shortening the treatment duration and number of fractions always increase
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Tryggvason, Gretar, Nabeel AlRawahi, and Asghar Esmaeeli. "Direct Numerical Simulations of Flows With Phase Change." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32823.

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During the last decade, direct numerical simulations of multiphase flow have emerged as a major research tool. It is now possible, for example, to simulate the motion of several hundred bubbles and particles in simple flows and to obtain meaningful average quantities that can be compared with experimental results. These systems are, however, still very simple compared to those systems routinely encountered in engineering applications. It is, in particular, frequently necessary to account for phase change, both between solid and liquid as well as liquid and vapor. Most materials used for manmad
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