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Investment Castings of Magnesium Alloys: A Road Map and Challenges

A.V. Vyas M.P. Sutaria
Archives of Foundry Engineering | 2022 | vol. 22 | No 4 | 19-23 | DOI: 10.24425/afe.2022.140247
Keywords Magnesium Investment casting Reactions Melting
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Abstract

In the manufacturing sector, the processing of magnesium alloys through the liquid casting route is one of the promising methods to manufacture automotive and aircraft components, for their excellent mechanical properties at the lower weight. Investment casting process has the great cabaility to produce near net shape complex castings for automotive and aircraft applications. The distinct and attractive engineering properties of magnesium alloys have shown to be promising in terms of its potential to replace materials such as cast iron, steel, and aluminum In this regard, the efforts to develop processing technology for these alloys for their wide range of applications in industries have been reported by the scientific and engineering community. For successful production of magnesium alloy castings, it requires specialized foundry techniques because of the particular chemical and physical properties of magnesium; especially the reactive and oxidative nature of these alloys. The industry is young enough, to tap the potential.
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Authors and Affiliations

A.V. Vyas
1
ORCID: ORCID
M.P. Sutaria
1
ORCID: ORCID
  1. Department of Mechanical Engineering, Chandubhai S. Patel Institute of Technology, Charotar University of Science and Technology (CHARUSAT), Changa, Anand-388421, Gujarat, India

Influence of Rare Earth Sm Addition on Microstructure and Tensile Properties of Al-Si-Cu 319 Alloy

D.N. Patel M.P. Sutaria
Archives of Foundry Engineering | 2023 | vol. 23 | No 1 | 25-33 | DOI: 10.24425/afe.2023.144276
Keywords Al-Si-Cu 319 alloy Samarium SDAS Eutectic silicon tensile properties
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Abstract

In the present investigation, the influence of addition of the rare earth element samarium (Sm) in different concentrations (0, 0.1, 0.3, 0.5, 0.7 and 0.9wt.%) on the microstructure and tensile properties of the Al-Si-Cu 319 alloy have been evaluated. Microstructural constituents such as SDAS of α-Al and characteristics of eutectic silicon particles were observed by optical microscopy. It was concluded from the findings that Sm addition reduces the size of secondary dendrite arm spacings (SDAS) and altered the morphology of the eutectic silicon particles from needle-like to lamellar and smaller segments. The tensile properties of the Al-Si-Cu 319 alloy improved with the concentration of Sm. It was found that the highest tensile properties were obtained at 0.7wt.% addition of Sm, i.e., 55.5% higher than unmodified 319 alloy. With the further addition of the Sm above 0.7wt.%, it does not improve the tensile properties of the alloy. This can be attributed to the precipitation of the brittle and needle like quaternary Sm-rich intermetallic compounds observed through Scanning electron microscopy.
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Authors and Affiliations

D.N. Patel
1
M.P. Sutaria
1
ORCID: ORCID
  1. Department of Mechanical Engineering, Chandubhai S. Patel Institute of Technology, Charotar University of Science and Technology (CHARUSAT), Changa, Anand-388421, Gujarat, India

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