Microstructure and mechanical properties of Mg-Al-based alloy modified with cerium

被引：33

作者：

Chaubey, A. K. ^{[1
]}

Scudino, S. ^{[2
]}

Prashanth, K. G. ^{[2
]}

Eckert, J. ^{[2
,3
]}

机构：

[1] Inst Minerals & Mat Technol, Bhubaneswar 751013, Orissa, India

[2] IFW Dresden, Inst Komplexe Mat, D-01171 Dresden, Germany

[3] Tech Univ Dresden, Inst Werkstoffwissensch, D-01062 Dresden, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 625卷

关键词：

Magnesium alloys; Intermetallics; Casting; Precipitation; Mechanical characterization; FRACTURE-BEHAVIOR; CREEP RESISTANCE; RARE-EARTH; CE; STRONTIUM;

D O I：

10.1016/j.msea.2014.11.081

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mg90Al10-xCex with x=0, 1,3 and 5 (at%) have been prepared by copper mold casting and the influence of Ce on the microstructure and mechanical properties have been investigated. The addition of 1% Ce decreases the volume fraction of the gamma-Mg17Al12 phase and with the further increase of Ce to 3% and 5%, the gamma-Mg17Al12 intermetallic disappears completely with the formation of the Al11Ce3 and Al2Ce intermetallic phases. The room temperature compression tests show that Ce addition significantly improves the room temperature mechanical properties. For example, the alloy with 5% Ce displays a strength of 448 MPa compared to 318 MPa of the binary Ce-free alloy along with appreciable plasticity of about 9%. This improvement is due to grain refinement as well as to the precipitation of the Al11Ce3 and Al2Ce strengthening phases. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：46 / 49

页数：4

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