Effects of Eutectic Si and Secondary Dendrite Ann Spacing on the Mechanical Properties of Al-Si-Cu Cast Alloys

被引：6

作者：

Lee, Kyungmin ^{[1
,2
]}

Choi, Seweon ^{[2
]}

Kim, Youngchan ^{[2
]}

Kim, Yumi ^{[1
,2
]}

Kang, Changseok ^{[2
]}

Kim, Youngman ^{[1
]}

Hong, Sungkil ^{[1
]}

机构：

[1] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

[2] Korea Inst Ind Technol, Kwangju 500480, South Korea

来源：

KOREAN JOURNAL OF METALS AND MATERIALS | 2014年 / 52卷 / 11期

关键词：

alloy; solidification; microstructure; image analysis; Si morphology; ALUMINUM-ALLOYS; HEAT-TREATMENT;

D O I：

10.3365/KJMM.2014.52.11.923

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present study aims at investigating the effects of eutectic Si and Secondary dendrite arm spacing (SDAS) on mechanical properties of Al-Si-Cu alloy. Heat treatment and controlling of solidification rate affect to microstructure of Al-Si-Cu alloy. Al-Si-Cu alloy was dissolved in an electric furnace. The alloy cast in STD61 mold which had been pre-heated to 95 degrees C and 200 degrees C. Eutectic Si and SDAS were finer as cooling rate increased. Image analysis technique has been utilized to examine the microstructure. Microstructure observation results showed that T6 heat treatment has a strong influence eutectic Si particle morphology. The mechanical properties, such as tensile strength, yield strength, elongation, were improved by ASTM E8 standard. Tensile properties of the Al-Si-Cu alloys prepared by different cooling rates were the same as each other by T6 heat treatment.

引用

页码：923 / 929

页数：7

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