Mechanical properties of FeSi (ε), FeSi2 (ζα) and Mg2Si

被引：62
|
作者：
Milekhine, V
Onsoien, MI
Solberg, JK [1 ]
Skaland, T
机构：
[1] Norwegian Univ Sci & Technol, N-7491 Trondheim, Norway
[2] SINTEF, Mat Technol, N-7465 Trondheim, Norway
[3] Eldem ASA, Foundry Prod Div, N-4602 Kristiansand, Norway
来源：
INTERMETALLICS | 2002年 / 10卷 / 08期
关键词：
silicides; various; mechanical properties at ambient temperature;
D O I：
10.1016/S0966-9795(02)00046-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
FeSi, alpha-FeSi2 (high-temperature modification) and Mg2Si are the major phases in ferro-silicon-magnesium (FeSiMg) based foundry alloys used for the production of ductile cast iron. Small quantities of these phases were produced by induction melting for a more detailed study of the behaviour of each phase. The chemical composition of each phase was verified by electron microprobe analyses (EPMA). Investigation of the microstructure showed the existence of a small amount of second phases in the produced samples. Compression tests were performed to determine the elastic modulus of each compound. The fracture toughness of Fesi was established from three-point bending tests and was compared with values calculated from Vickers indentations. For alpha-FeSi2 and Mg2Si, the fracture toughness was estimated from hardness indentation tests. Palmqvist type cracks developed from the corners of the indentation marks in all three phases. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：743 / 750
页数：8
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