Role of Fe/Mn Ratio and Cooling Rate on Precipitation of Iron Intermetallics α-AlFeMnSi and β-AlFeSi in a 356 Alloy

被引：2

作者：

Castro-Roman, M. J. ^{[1
]}

Aguilera-Luna, I. ^{[1
]}

Gaona-Coronado, A. A. ^{[1
]}

Herrera-Trejo, M. ^{[1
]}

Torres-Torres, J. ^{[1
]}

机构：

[1] IPN, CINVESTAV, Unidad Saltillo, Ramos Arizpe 25000, Coahuila, Mexico

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2015年 / 68卷 / 06期

关键词：

Cooling rate; 356; alloy; Iron intermetallics; Fe/Mn ratio; Aluminum alloys; MECHANICAL-PROPERTIES; CASTING ALLOYS; SI; MICROSTRUCTURE; BETA-AL5FESI; PHASES; MN;

D O I：

10.1007/s12666-015-0703-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of Fe/Mn ratio and cooling rate on the proficiency formation of iron intermetallics alpha-AlFeMnSi and beta-AlFeSi was studied. Low Fe/Mn ratio promotes the formation and growth of alpha-AlFeMnSi and hinders the formation of beta-AlFeSi. Increasing the cooling rate decreases the formation temperature of beta-AlFeSi below the silicon-aluminum eutectic temperature. This effect is attributed to reduction of the beta-AlFeSi particles in the microstructure. The combination of Fe/Mn = 1.5 ratio and cooling rate of 1 A degrees C/s suppresses almost completely the beta-AlFeSi particles and promotes the formation of alpha-AlFeMnSi. A general conclusion is: the alpha-AlFeMnSi phase is promoted at low Fe/Mn ratios and at high cooling rates, while the condition is opposite for beta-AlFeSi phase.

引用

页码：1193 / 1197

页数：5

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