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Assessment Of The Effect Of Grain Refinement On The Solidification Characteristics Of Al Si Cu Eutectic Cast Alloy Using Thermal Analysis Technical Ca Ccta
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Book Synopsis Assessment of the Effect of Grain Refinement on the Solidification Characteristics of Al-Si-Cu Eutectic Cast Alloy Using Thermal Analysis Technical (CA-CCTA) by :
Download or read book Assessment of the Effect of Grain Refinement on the Solidification Characteristics of Al-Si-Cu Eutectic Cast Alloy Using Thermal Analysis Technical (CA-CCTA) written by and published by . This book was released on 2015 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solidification Behaviour of Al-Sn-Cu Immiscible Alloys and Al-Si Cast Alloys Processed Under Intensive Shearing by : Hirenkumar R. Kotadia
Download or read book Solidification Behaviour of Al-Sn-Cu Immiscible Alloys and Al-Si Cast Alloys Processed Under Intensive Shearing written by Hirenkumar R. Kotadia and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alloy castings are usually solidified with a coarse columnar grain structure under normal casting conditions unless the mode of the solidification is carefully controlled. It is desirable for the grain structure to be fine and equiaxed to improve their mechanical performance as finished castings. It is possible to develop a fine and equiaxed grain structure either by increasing the number of nucleation sites or by grain multiplication. Immiscible alloys with a microstructure in which a soft phase is dispersed homogeneously in a hard matrix have significant potential applications in advanced bearing systems, especially for the automotive industry. Despite considerable efforts made worldwide, including extensive space experiments, no casting techniques so far can produce the desired immiscible microstructure of alloys. Experimental results on Al-Sn-Cu immiscible alloys have confirmed that intensive shearing using melt conditioning by an advanced shearing technology (MCAST) unit, is an effective way to achieve a fine and uniform dispersion of the soft phase without macro-demixing, and that such a dispersed microstructure can be further refined in alloys with precipitation of the primary Al phase prior to the demixing reaction. In addition, it was found that melt shearing at 200 rpm for 60 s will be adequate to produce a fine and uniform dispersion of the Sn phase, and that a higher shearing speed and prolonged shearing time can only achieve further minor refinement. A study of Al-Si hypoeutectic and hypereutectic alloys presents the effects of the processing temperature and intensive shearing on the microstructural and mechanical properties which have been investigated systematically. Attempts have been made to explain the solidification mechanism with intensive melt shearing. The sheared melt was cast into tensile test samples by high pressure die caster (HPDC) to examine the microstructures and mechanical properties. The experimental results reveal that significant grain refinement and uniformity of grains was achieved by the intensive shearing and also a considerable increase in mechanical properties with pouring temperature by changing intermetallic particles morphology, the position of defect band and reduced microscopic defects.
Book Synopsis Feeding Behavior of the Aluminum-rich Corner of the Al-Cu-Si Alloys by : Hsin-Wei Shan
Download or read book Feeding Behavior of the Aluminum-rich Corner of the Al-Cu-Si Alloys written by Hsin-Wei Shan and published by . This book was released on 1995 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantification of Solidification Characteristics of Al-si Alloys by Thermal Analysis by : Glenn Byczynski (E.)
Download or read book Quantification of Solidification Characteristics of Al-si Alloys by Thermal Analysis written by Glenn Byczynski (E.) and published by . This book was released on 1997 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Control of Grain Refinement of AL-Si Alloys by Thermal Analysis by : David Gloria Ibarra
Download or read book Control of Grain Refinement of AL-Si Alloys by Thermal Analysis written by David Gloria Ibarra and published by . This book was released on 1999 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A time parameter, t1, which is the duration of the recalescence period, and the maximum undercooling and recalescence temperatures, TU and TR respectively, yield the best correlation with grain size. These results are consistent irrespective of the type of grain refiner, for both 319 and 356 alloys, but only when the alloy solidifies at a cooling rate of 1.0°C/s). Lower cooling rates produce scattering in the results." --
Book Synopsis Effect of Solidification Mechanism on the Pororsity Formation in Aluminum-silicon Alloys by : Jeongmin Kim
Download or read book Effect of Solidification Mechanism on the Pororsity Formation in Aluminum-silicon Alloys written by Jeongmin Kim and published by . This book was released on 1996 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Fluidity of Al-Si-Cu Casting Alloys by : Jeongmin Kim
Download or read book The Fluidity of Al-Si-Cu Casting Alloys written by Jeongmin Kim and published by . This book was released on 1994 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Grain Refinement and Modification of a Hypoeutectic Al-Si Alloy by Computer Aided-thermal Analysis by : Ali Aykut
Download or read book Study of Grain Refinement and Modification of a Hypoeutectic Al-Si Alloy by Computer Aided-thermal Analysis written by Ali Aykut and published by . This book was released on 1987 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis THERMAL ANALYSIS OF EUTECTIC MODIFIED AND GRAIN REFINED ALUMINUM-SILICON ALLOYS. by :
Download or read book THERMAL ANALYSIS OF EUTECTIC MODIFIED AND GRAIN REFINED ALUMINUM-SILICON ALLOYS. written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To see the effect of these agents on mechanical properties, hardness, tensile strength and percent elongation values were investigated. In this study the possibility of predicting the mechanical properties prior to casting by thermal analysis method was examined by regression analysis method. By this method relationship between thermal analysis parameters and mechanical properties was established.
Book Synopsis Al-Si Alloys by : Francisco C. Robles Hernandez
Download or read book Al-Si Alloys written by Francisco C. Robles Hernandez and published by Springer. This book was released on 2017-07-02 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details aluminum alloys with special focus on the aluminum silicon (Al‐Si) systems – that are the most abundant alloys second only to steel. The authors include a description of the manufacturing principles, thermodynamics, and other main characteristics of Al‐Si alloys. Principles of processing, testing, and in particular applications in the Automotive, Aeronautical and Aerospace fields are addressed.
Book Synopsis Influence of the Microstructure on Mechanical Properties and Damage Mechanisms in Al-Si-Cu Alloys by Using 2D and 3D In-situ Analysis by : Zaidao Li
Download or read book Influence of the Microstructure on Mechanical Properties and Damage Mechanisms in Al-Si-Cu Alloys by Using 2D and 3D In-situ Analysis written by Zaidao Li and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2D and 3D characterization and image analysis have been performed to measure the microstructural changes associated with: different Sr, Fe and Mn levels, the casting process (Gravity Die Casting vs. Lost Foam Casting, LFC) and the solution heat treatments in A319 alloy. The evolution of microstructure in Al-Si-Cu alloy with different alloying elements addition was also studied by thermal analysis. The microstructure consists of hard inclusions, i.e. eutectic Si, iron-intermetallics and Al2Cu phases, and pores. The effect on mechanical properties of the alloys has been monitored by Vickers hardness measurement and tensile tests. Surface damage observations are performed on A319 alloys with different Fe content during in-situ tensile test, which allows following the development and localization of the deformation and cracks. Digital image correlation measurement and fractography highlighted the role of iron-intermetallics in the cracks initiation and propagation. Tensile tests on LFC A319 samples with two different heat treatment conditions were performed in-situ under Laboratory Computed Tomography. Strain measurements from digital volume correlation and observed damage mechanisms show that cracks initiate at hard inclusions in the areas with sufficient stress concentrations, which are mainly provided by large pores, and often propagate through the fracture of Al2Cu, iron-intermetallics, as well as through Si particles rather than by their decohesion from the matrix.
Book Synopsis Development of a Thermal Analysis Technique for Determining Grain Refinement in Al Alloys by : John Gilbert Harms
Download or read book Development of a Thermal Analysis Technique for Determining Grain Refinement in Al Alloys written by John Gilbert Harms and published by . This book was released on 1975 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Casting Parameters and Chemical Composition on the Solidification Behaviour of Al-Si-Cu Hypoeutectic Alloy by : Jelena Pavlovic-Krstic
Download or read book Impact of Casting Parameters and Chemical Composition on the Solidification Behaviour of Al-Si-Cu Hypoeutectic Alloy written by Jelena Pavlovic-Krstic and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Composition in As-Cast and Homogenized Al-Si-Cu Alloys by : Ashrafi Ehsan Ahmed
Download or read book Effect of Composition in As-Cast and Homogenized Al-Si-Cu Alloys written by Ashrafi Ehsan Ahmed and published by LAP Lambert Academic Publishing. This book was released on 2014-08-04 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminium alloys with a wide range of properties are used in engineering structures. These properties can be largely modified by changing the alloy composition and by cold working. Si, Cu, Zn and Mg are the most commonly used alloying elements in aluminium, which have sufficient solid solubility. The as-cast microstructure of cast aluminium alloys normally displays significant segregation and supersaturation. For this, homogenization of aluminium alloys is often done to improve workability and mechanical properties. This book is based on the research about influence of Cu content, cold working and homogenization in Al-Si alloys. The effects were analysed using microstructure study, phase-property modelling, image analysis and hardness measurement. This work should help researchers and metallurgists who are working on modification of alloy properties. Also it will help students who have keen interest in study of microstructure, modelling and image analysis.
Book Synopsis Effect of Chemical Modification of Al-Si Alloys on Thermal Diffusivity and Contact Heat Transfer at the Casting-Chill Interface by : K. Narayan Prabhu
Download or read book Effect of Chemical Modification of Al-Si Alloys on Thermal Diffusivity and Contact Heat Transfer at the Casting-Chill Interface written by K. Narayan Prabhu and published by . This book was released on 2012 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The heat flow during the unidirectional downward solidification of Al-7Si and Al-12Si alloys was analyzed using thermal analysis technique and inverse modeling. Chills instrumented with thermocouples were brought into contact with a small pool of liquid metal so as to minimize the effect of convection caused by pouring and temperature gradients. Modification melt treatment resulted in an increase in the cooling rate of the solidifying casting near the casting-chill interfacial region. The corresponding interfacial heat flux transients were also found to be higher. The thermal diffusivities of alloys were measured using a laser pulse technique and were found to be higher for modified alloys. However, the increase in the heat flux transients was attributed mainly to the improvement in the casting-chill interfacial thermal contact condition brought about by the decrease in the surface tension of the liquid metal upon the addition of sodium.
Book Synopsis Directional Solidification Characteristics of Hyper-eutectic Al-Cu Alloys Under Varying Gravity Conditions by : Hong Yu
Download or read book Directional Solidification Characteristics of Hyper-eutectic Al-Cu Alloys Under Varying Gravity Conditions written by Hong Yu and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Computational Materials Engineering (ICME) of Aluminum Solidification and Casting by : Colin D. Ridgeway
Download or read book Integrated Computational Materials Engineering (ICME) of Aluminum Solidification and Casting written by Colin D. Ridgeway and published by . This book was released on 2020 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditionally, the design and eventual casting of engineering components has been plagued by the assumption of homogeneous mechanical properties across the whole of the casting. Such an assumption is rarely the case and often leads to overdesign and excessive downstream waste. To combat this, the Integrated Computation Materials Engineering (ICME) approach was implemented to provide an increased level of accuracy for the prediction of location specific properties in cast aluminum. Variable properties often result from variable cooling rates that occur in a structure resulting from cooling lines or chill blocks located within the mold package, variable alloying content and finally the defects present in the alloy. In the context of this research, variable cooling was studied using the concept of a maximum chill scenario where the heat transfer coefficient (HTC) was examined and found to develop over time. The resulting microstructure was included an extremely refined eutectic silicon within the interdendritic regions. Unique, time-dependent HTC maps were created for optimized maximum chill scenario casting conditions to provide unique cooling and solidification conditions across the whole of a casting. The effect of Magnesium on hypoeutectic Al-Si alloys Primary Dendrite Arm Spacing (PDAS) was examined next. Directional solidification experimentation was coupled with Cellular Automaton (CA) simulations to develop a model to predict the location specific PDAS within Al-Si-Mg alloys. Additionally, location specific properties are known to result from defects within the microstructure such oxide inclusions and porosity. These voided regions act as regions of increased stress and result in premature failure of engineered components. In this work the fluid flow, filling conditions and free surface of the molten aluminum was examined to create a new model that was accurately shown to predict the location specific defect content in a cast structure. Finally, the sum of this work was used to couple various Computer-Aided Engineering (CAE) software tools to complete the ICME approach. By coupling various commercial software, exact location specific mechanical properties were shown to be accurately predicted using a method term the CA - FEA approach. The CA - FEA approach is the first method for using physics based microstructure predictions to determine the location specific mechanical down to a cubic millimeter.
