Microstructure and Mechanical Properties of Ultrafine-Grained Magnesium AZ91 Alloy

被引：3
|
作者：
Fintova, Stanislava [1 ]
Pantelejev, Libor [2 ]
Kunz, Ludvik [1 ]
机构：
[1] AS CR Brno, Inst Phys Mat, Brno, Czech Republic
[2] Brno Univ Technol, Brno, Czech Republic
来源：
METALLOGRAPHY XV | 2014年 / 782卷
关键词：
AZ91; ECAP; microstructure; mechanical properties; cyclic plastic deformation; fatigue crack initiation; FATIGUE BEHAVIOR; MG-ALLOY;
D O I：
10.4028/www.scientific.net/MSF.782.384
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructure, mechanical properties, cyclic plastic deformation behavior and fatigue strength of ultrafme-grained (UFG) magnesium alloy AZ91 processed by equal channel angular pressing (ECAP) were investigated. ECAP of originally cast alloy results in development of bimodal structure, improved yield stress, tensile strength and ductility when compared to the as-cast state. Endurance limit based on 10(7) cycles is also improved, however exhibits large scatter. Initiation of fatigue cracks takes place in regions of large grains in the bimodal structure, where the content of Mg17Al12 particles is low.
引用
收藏
页码：384 / +
页数：2
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