Combined effect of bismuth content and cooling rate on microstructure and mechanical properties of Al-8.5Si-0.4Mg-0.3Fe alloy

被引：3

作者：

Farahany, S. ^{[1
]}

Ourdjini, A. ^{[1
]}

Idris, M. H. ^{[1
]}

Takaloo, A. V. ^{[2
]}

Thai, L. T. ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Engn, Johor Baharu 81310, Malaysia

[2] Seoul Natl Univ, Dept Mat Sci & Engn, Res Inst Adv Mat, Seoul 151742, South Korea

来源：

CANADIAN METALLURGICAL QUARTERLY | 2013年 / 52卷 / 02期

关键词：

Bismuth; Cooling rate; Aluminium alloys; Solidification; Weibull; SOLIDIFICATION CONDITIONS; CORROSION-RESISTANCE; TENSILE PROPERTIES; HEAT-TREATMENT; QUALITY INDEX; SI;

D O I：

10.1179/1879139512Y.0000000045

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

This study investigates the combined effect of Bi content (0.1, 0.2, 0.4 and 0.5 wt-%) and cooling rate (from 0.7 to 4 degrees C s(-1)) on the microstructure, tensile characteristics, quality index and two-parameter Weibull modulus of an Al-8.5Si-0.4Mg-0.3Fe alloy. Results show that Bi refined the eutectic Si structure and that increasing the cooling rate intensified the refining efficiency. The thickness of the beta-Al5FeSi intermetallic decreased with an increase in the cooling rate, but no significant effect was observed with the addition of Bi. The contour maps of mechanical properties suggest that the effect of cooling rate on mechanical properties was more significant than that of Bi additions. The highest Weibull modulus for the base alloy and Bi containing alloy was obtained at the cooling rate of 4 degrees C s(-1). Decrease in the thickness of beta intermetallic phase and reduced porosity with increasing cooling rate appeared to cause a decreased variability of UTS data.

引用

页码：208 / 216

页数：9

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