Effect of Fe-rich intermetallics on the wear behavior of eutectic Al-Si piston alloy (LM13)

被引：53
作者：
Abouei, V. [1 ]
Saghafian, H. [1 ]
Shabestari, S. G. [1 ]
Zarghami, M. [2 ]
机构：
[1] Iran Univ Sci & Technol, Sch Met & Mat Engn, Ctr Excellence Adv Mat Proc, Tehran 1684613114, Iran
[2] Supplying Automot Parts Co, Tehran, Iran
来源：
MATERIALS & DESIGN | 2010年 / 31卷 / 07期
关键词：
ALUMINUM-ALLOY; IRON; SOLIDIFICATION; PARAMETERS; PHASES; CAST;
D O I：
10.1016/j.matdes.2010.02.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present study, the effect of Fe-rich intermetallics has been investigated on the wear behavior of eutectic Al-Si alloy (LM13). Dry sliding wear tests have been conducted using a pin-on-disk machine under different normal loads of 18, 51, 74 and 100 N at a constant sliding speed of 0.3 m/s. Addition of 1.2% Fe to the LM13 alloy leads to the formation of the flake like 8-intermetallic compounds. These hard compounds initiate micro cracks and can reduce the wear resistance of the alloy. The addition of Mn converts the flake like beta-intermetallic compounds to the star-like alpha-intermetallics and decreases the detrimental effect of iron. Applying high cooling rate during solidification of the alloy containing Fe and Mn, resulted to the formation of finer alpha-intermetallic compounds and improved the wear behavior of the alloy to a great extent. (c) 2010 Elsevier Ltd. All rights reserved.
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收藏
页码：3518 / 3524
页数：7
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