Microstructure and mechanical properties of Laves phase-reinforced Fe-Zr-Cr alloys

被引：40
|
作者：
Scudino, S. [1 ]
Donnadieu, P. [2 ]
Surreddi, K. B. [1 ]
Nikolowski, K. [1 ]
Stoica, M. [1 ]
Eckert, J. [1 ,3 ]
机构：
[1] IFW Dresden, Inst Komplexe Mat, D-01171 Dresden, Germany
[2] UJF, CNRS, SIMAP INPGrenoble, F-38402 St Martin Dheres, France
[3] Tech Univ Dresden, Inst Werkstoffwissensch, D-01062 Dresden, Germany
来源：
INTERMETALLICS | 2009年 / 17卷 / 07期
关键词：
Laves phases; Multiphase intermetallics; Mechanical properties; Microstructure; ROOM-TEMPERATURE DEFORMATION; HIGH-STRENGTH; PART II; COMPOSITES;
D O I：
10.1016/j.intermet.2009.01.007
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：
Multi-phase Fe90-xZr10Crx alloys with 0 <= x <= 10 containing cubic C15 and hexagonal C14/C36 Laves phases have been prepared by copper mold casting. The microstructure of the samples consists of micrometer-sized Laves phase particles embedded in an ultrafine eutectic matrix of alternating lamellae of alpha-Fe and Laves phases. Room temperature compression tests of the binary alloy reveal a high strength of 1900 MPa combined with a plastic strain of about 9%. The addition of Cr improves the plastic strain up to 17% while reducing the strength only by about 70 MPa. The increased plastic deformation is linked to the specific structural features of the Laves phases. For the binary alloy, shearing and crack formation within the C15 phase limits plastic deformation. In contrast, in the samples containing Cr no shearing occurs within the C14/C36 phases and crack formation, which is observed at the particle/ferrite interface, is retarded. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：532 / 539
页数：8
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