An investigation on the microstructure and tensile properties of direct squeeze cast and gravity die cast 2024 wrought Al alloy

Hajjari, E.; Divandari, M.

doi:10.1016/j.matdes.2008.04.012

Cited by 100 publications

(52 citation statements)

References 10 publications

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“…For example, the UTS and YS of the 10 vol % 10 µm SiC p reinforced 2024 composite prepared by extrusion were 308 MPa and 210 MPa, respectively [24], and those of the 15 vol % 10 µm SiC p reinforced 2024 composite prepared by PM were 320 MPa and 212 MPa, respectively [25]. Furthermore, these two properties of the PT 2024 alloy were also significantly higher than those of the squeeze-cast 2024 alloy [26]. All of these show that PT is a promising method to fabricate metallic materials, especially the particle reinforced metal matrix composites.…”

Section: D)mentioning

confidence: 99%

Tensile Properties and Fracture Behavior of a Powder-Thixoformed 2024Al/SiCp Composite at Elevated Temperatures

Chen

2017

Metals

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Abstract:In the present work, the tensile properties and fracture behavior of a 2024Al composite reinforced with 10 vol % SiC p and fabricated via powder thixoforming (PT) were studied at temperatures ranging from 25 • C to 300 • C with a strain rate of 0.05 s −1 , as well as the PT 2024 alloy. The results indicated that the tensile strengths of both the PT materials were all decreased with increasing the temperature, but the decrease rate of the composite was smaller than that of the 2024 alloy, and the composite exhibited higher tensile strength than that of the 2024 alloy at all of the employed testing temperatures due to the strengthening role of SiC p . Increasing temperature was beneficial for enhancing the ductility of materials, and the maximum elongation was reached at 250 • C. The elongation decrease over 250 • C was attributed to the cavity formation due to the debonding of the SiC p /Al interface and the fracturing of the matrix between SiC p . The fracture of the composite at room temperature initiated from the fracture of SiC p and the debonding of the SiC p /Al interface, but that at high temperatures was dominated by void nucleation and growth in the matrix besides the interface debonding.

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Section: D)mentioning

confidence: 99%

Tensile Properties and Fracture Behavior of a Powder-Thixoformed 2024Al/SiCp Composite at Elevated Temperatures

Chen

2017

Metals

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“…The experiments performed by various researchers using classical engineering approach to study the effects of squeeze pressure, casting temperature, die temperatures, time delay, inoculants and pressure duration on solidification time, density, secondary dendrite arm spacing, grain size, hardness, tensile and impact strengths of different aluminium based alloys [48][49][50][51][52][53][54][55][56][57][58][59][60]. The following advantages and limitations have been identified from the above discussed literatures,…”

Section: Classical Engineering Experimental Approachmentioning

confidence: 99%

Modelling in Squeeze Casting Process-Present State and Future Perspectives

Patel¹,

MB²

2015

Adv Automob Eng

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The growing demand in today's competitive manufacturing environment has encouraged the researchers to develop and apply modelling tools. The development and application of modelling tools help the casting industries to considerably increase productivity and casting quality. Till date there is no universal standard available to model and optimize any of the manufacturing processes. However the present work discusses the advantages and limitations of some conventional and non-conventional modelling tools applied for various casting processes. In addition the research effort made by various authors till date in modelling and optimization of the squeeze casting process has been reported. Furthermore the necessary steps for prediction and optimization are high lightened by identifying the trends in the literature. Ultimately this research paper explores the scope for future research in online control of the process by automatically adjusting the squeeze cast process parameters through reverse prediction by utilizing the soft computing tools namely, Neural Network, Genetic Algorithms, Fuzzy-logic Controllers and their different combinations. The present work also proposed a detailed methodology, starting from the selection of process variables till the best process variable combinations for extreme values of the outputs responsible for better product quality using experimental, prediction and optimization methodology. Citation: Manjunath Patel GC, Krishna P, Parappagoudar MB (2015) Modelling in Squeeze Casting Process-Present State and Future Perspectives. Modelling in Squeeze Casting

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“…Their presence, in turn, can be associated with the material shrinkage in the parent alloy. This defects resulted from shrinkage may occur in (gravity) cast components [23,24,28]. An example of such a defect is shown in Fig.…”

Section: The Upper Part Of the Weld Microstructurementioning

confidence: 99%

Characteristics of Alsi9mg/2017A Aluminum Alloys Friction Stir Welded with Offset Welding Line and Root-Side Heating/ Charakterystyka Stopów Aluminium Alsi9mg/2017A Zgrzewanych Metodą Friction Stir Welding Z Przesunięcem Linii Zgrzewania I Dodatkowym Źródłem Ciepła Od Strony Grani

Mroczka¹

2014

Archives of Metallurgy and Materials

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Welding of materials differing significantly in terms of chemical composition and microstructure is one of the main advantages of the Friction Stir Welding method. This paper presents the results of welding of a cast AlSi9Mg (hypoeutectic silumin) and 2017A aluminum alloys. The welding was performed with a high linear velocity (over 1 m/min). The modification of the process consisted in offsetting the welding line toward the advancing side, and in on application of an additional heat source from the root side. The study of the macrostructure (with high resolution of the image) revealed the presence of defects in the weld, despite greater plasticity of the material results from raising the temperature. The analysis (by SEM, SEM-EDS) of constituent stable phases within the cast alloy, showed their considerable fragmentation, however to a various degree. The material above the weld nugget was not mixed and contained micro-defects that did not result from the welding. The hardness distribution within the weld nugget, reveals slight strengthening of the both cast and wrought alloys. A metastable state of the 2017A alloy was also documented, however, the alloy hardness increased within the weld nugget due to the natural aging. On the other hand, the hardness of the heat-affected zone in this alloy does not increase also due to the natural aging.Keywords: FSW, aluminium alloys, AlSi9Mg, 2017AJedną z głównych zalet technologii FSW jest zdolność do spajania materiałów znacznie różniących się składem chemicznych. W artykule przedstawiono rezultaty zgrzewania stopów aluminium AlSi9Mg (silumin podeutektyczny) i 2017A. Zgrzewanie wykonano z dużą prędkością liniową (powyżej 1 m/min). Proces zgrzewania zmodyfikowano przesuwając linię zgrzewania w kierunku strony natarcia oraz stosując dodatkowe źródło ciepła od strony grani. Badania makrostruktury zgrzeiny wykazały obecność wad mimo zwiększonej plastyczności materiału podczas zgrzewania, w wyniku podwyższenia temperatury. Podczas zgrzewania FSW dochodzi do fragmentacji cząstek w obszarze działania narzędzia. Na podstawie badań SEM i SEM-EDS wykazano różny stopień fragmentacji wydzieleń w stopie AlSi9Mg. Badania wykazały ponadto ograniczoną intensywność mieszania materiału przez narzędzie w strefie nad jądrem zgrzeiny. W tym obszarze występują również niewielkich rozmiarów wady, niebędące efektem płynięcia materiału. Z kolei analizy rozkładów twardości na przekroju porzecznym zgrzeiny dowiodły niewielkiego umocnienia stopu odlewniczego. Natomiast stop 2017A, w obszarze jądra zgrzeiny, wykazał niestabilność mikrostruktury (bezpośrednio po zgrzewaniu) oraz uległ umocnieniu w wyniku starzenia naturalnego. Starzeniu nie uległ obszar strefy wpływu ciepła.

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An investigation on the microstructure and tensile properties of direct squeeze cast and gravity die cast 2024 wrought Al alloy

Cited by 100 publications

References 10 publications

Tensile Properties and Fracture Behavior of a Powder-Thixoformed 2024Al/SiCp Composite at Elevated Temperatures

Tensile Properties and Fracture Behavior of a Powder-Thixoformed 2024Al/SiCp Composite at Elevated Temperatures

Modelling in Squeeze Casting Process-Present State and Future Perspectives

Characteristics of Alsi9mg/2017A Aluminum Alloys Friction Stir Welded with Offset Welding Line and Root-Side Heating/ Charakterystyka Stopów Aluminium Alsi9mg/2017A Zgrzewanych Metodą Friction Stir Welding Z Przesunięcem Linii Zgrzewania I Dodatkowym Źródłem Ciepła Od Strony Grani

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