Fatigue properties of expanded perlite/aluminum syntactic foams

被引：29

作者：

Taherishargh, Mehdi ^{[1
]}

Katona, Balint ^{[2
]}

Fiedler, Thomas ^{[1
]}

Orbulov, Imre Norbert ^{[2
,3
]}

机构：

[1] Univ Newcastle, Sch Engn, Mech Engn, Callaghan, NSW, Australia

[2] Budapest Univ Technol & Econ, Dept Mat Sci & Engn, Fac Mech Engn, Budapest, Hungary

[3] MTA BME Res Grp Composite Sci & Technol, Budapest, Hungary

来源：

JOURNAL OF COMPOSITE MATERIALS | 2017年 / 51卷 / 06期

关键词：

Metallic syntactic foams; expanded perlite; fatigue; infiltration; mechanical characterization; CELL ALUMINUM FOAM; MECHANICAL-PROPERTIES; COMPRESSION FATIGUE; CRACK PROPAGATION; ALLOY; BEHAVIOR; FAILURE; COMPOSITES; LIFE;

D O I：

10.1177/0021998316654305

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The main purpose of this paper is to present the basic fatigue properties of metal matrix syntactic foams. The investigated syntactic foams consisting of expanded perlite and A356 aluminum matrix were produced using an inert gas pressure infiltration technique. The obtained foams were subjected to cyclic compressive loading in order to investigate their fatigue properties. The standard procedure for cyclic fatigue testing was slightly modified to account for the variation of porosity and strength which is typical for metallic foam samples. This approach allows the direct comparison of the fatigue test results between all investigated samples. Depending on the applied load level, two different failure mechanisms were identified that resulted in characteristic deformation - loading cycle curves. The failure mechanisms were further investigated on the microstructural scale: traces of fatigue beachmarks and extensive plastic deformation were found. Furthermore, Wohler-like deformation - lifetime diagrams were created in order to predict the expected lifetime of the properties of metal matrix syntactic foams .

引用

页码：773 / 781

页数：9

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