Effect of processing on mechanical properties of an Fe-8.5 wt% Al-1.1 wt% C alloy

被引：19

作者：

Baligidad, RG ^{[1
]}

Prakash, U ^{[1
]}

Radhakrishna, A ^{[1
]}

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 255卷 / 1-2期

关键词：

Fe-Al alloys; carbon addition; melting practice; mechanical properties;

D O I：

10.1016/S0921-5093(97)00859-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A Fe-8.5 wt.% Al-1.1 wt.% C alloy was melted under a flux cover by air induction melting (AIM). Subsequent processing of the AIM ingots through electroslag remelting (ESR) resulted in a significant improvement in ductility. This may be attributed to the refined axially oriented grain structure, free from internal defects observed in the ESR ingots. The alloy exhibited a significantly higher yield strength at test temperatures up to 500 degrees C than those reported for complex Fe-AL alloys with comparable aluminium contents. This may be due to dispersion strengthening caused by the presence of a large volume fraction of Fe3AlC0.5 precipitates in the alloy. Though the addition of carbon may decrease ductility, it allows commercial production of alloys with reasonable (8%) room temperature ductility, melted using cheap raw materials and a low cost melting procedure. The high carbon ESR alloy offers the best ductility reported for cast Fe-Al alloys with similar aluminium contents. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：162 / 168

页数：7

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