مقاله Effect of grain refinement on the microstructure and tensile properties of thin 319 Al castings : تی پی بین

خلاصه مقاله

The structural examinations and tensile properties of thin-section Al castings (319 Al alloy) have been investigated by applying a pattern with different cross sections (2–12 mm). Al–5Ti–1B and Al–5Zr grain refiners were added to the molten Al alloy to produce different levels of Ti (0.01%, 0.05%, 0.1% and 0.15%) and Zr (0.05%, 0.1%, 0.2%, 0.3%, 0.4% and 0.5%) in the castings. From macrostructural studies, it was found that Al–5Zr is less effective in grain refining of 319 alloy in comparison with Al–5Ti–1B master alloy. The optimum levels of grain refiners were selected for determination of tensile properties. T6 heat treatment was applied for selected specimens before tensile testing. Further structural results also showed that thinner sections are less affected by grain refiners. This observation was found to be in a good agreement with tensile test results, where tensile properties of the base and grain refined alloys did not show considerable differences in thinner sections (<6 mm).

نویسندگان

M.J. Shabani [ Center of Excellence for High Performance Materials, School of Metallurgy and Materials, University of Tehran, Tehran, Iran ]

M. Emamy [ Center of Excellence for High Performance Materials, School of Metallurgy and Materials, University of Tehran, Tehran, Iran ]

N. Nemati [ Center of Excellence for High Performance Materials, School of Metallurgy and Materials, University of Tehran, Tehran, Iran ]

کلمات کلیدی

Effect grain refinement on the microstructure tensile properties

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Materials and Design

Aims Scope of Materials Design Modern engineered materials play a central role in enabling technological designs that underpin, advance and revolutionise engineering practice. Materials Design seeks to publish reports of materials research that present applicable advances in the insight into structure and function, and provide useable and reproducible recipes for the synthesis, preparation, characterisation, modelling and exploitation of new metallic alloys, ceramics, polymers, coatings, composites and bio-materials systems.

حوزه های تحت پوشش : عمران