The cyclic deformation behavior of Mg-Y2O3 nanocomposites

被引：18
|
作者：
Goh, C. S. [1 ]
Gupta, M. [1 ]
Wei, J. [2 ]
Lee, L. C. [2 ]
机构：
[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
[2] Singapore Inst Mfg Technol, Singapore 638075, Singapore
来源：
JOURNAL OF COMPOSITE MATERIALS | 2008年 / 42卷 / 19期
关键词：
fatigue; magnesium; Y2O3; dislocation structure; metal matrix composite (MMC);
D O I：
10.1177/0021998308094544
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Constant stress amplitude cyclic tests were conducted on monolithic Mg and Mg reinforced with 0.5, 1, and 2 vol% of nano-size Y2O3. The cyclic life of the monolithic Mg and its nanocomposites were found to be comparable at the three stress amplitudes tested. Hardening behavior is observed throughout the whole fatigue life of all the specimens tested. Forest dislocations observed in Mg and Mg nanocomposites are responsible for the cyclic hardening. Addition of nanoparticles provides additional strengthening sources that cause the Mg-Y2O3 nanocomposites to harden more intensely that monolithic Mg.
引用
收藏
页码：2039 / 2050
页数：12
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