Compression fatigue of a cellular Al alloy

被引：134

作者：

Sugimura, Y

Rabiei, A

Evans, AG

Harte, AM

Fleck, NA

机构：

[1] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 269卷 / 1-2期

关键词：

cellular Al alloy; foam; fatigue; compression; strain mapping;

D O I：

10.1016/S0921-5093(99)00147-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

The cyclic compression of a cellular Al alloy has been evaluated. Plastic compression occurs beyond a critical number of cycles, N-T. At N < N-T the cumulative strains are negligible and the material has cyclic stability. At N>N-T, strain accumulates rapidly and preferentially within deformation bands, until the densification strain has been reached. The bands form preferentially from large cells in the ensemble. Such cells develop plastically buckled membranes which experience large strains upon further cycling, which lead to cracks. The cracks, once formed? result in rapid cyclic straining. This feature controls the fatigue life. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：38 / 48

页数：11

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