The effect of Manganese and cooling rate on the microstructure of piston`s alloy in the excess percentage of iron
Publish place: Iran International Aluminum Conference
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
IIAC02_072
تاریخ نمایه سازی: 12 اردیبهشت 1392
Abstract:
Adding of Fe to the alloy of piston for 0.7, 1.2 and 1.8% will create needle-like β intermetallic compounds and deteriorate mechanical properties. On the other hand, introduction of Sr and Mn will transform β intermetallic compounds to α in addition to modification of eutectic structure which can improve wear resistance and hardness. Results of this research have revealed that modification of the intermetallic compounds in the eutectic of Al-Si alloy by Mn (50% that of Fe) is possible just up to 1.2% of Fe. In contrast to previous expectation, the sample containing 1.8% Fe could not transform β intermetallics to α using 0.9% Mn. Increased rate of cooling from 3 to 15°C/s has decreased the eutectic structure and refined the intermetallic compounds.
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Authors
S. Ghadami
School of Materials and Metallurgical Engineering ,Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
S.G. Shabestari
School of Materials and Metallurgical Engineering ,Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
H. Saghafian
School of Materials and Metallurgical Engineering ,Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
V. Abouei
School of Materials and Metallurgical Engineering ,Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
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