Plastic deformation of decagonal Al-Ni-Co quasicrystals

被引：51

作者：

Feuerbacher, M

Bartsch, M

Grushko, B

Messerschmidt, U

Urban, K

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST FESTKORPERFORSCH, D-52425 JULICH, GERMANY

[2] MAX PLANCK INST MIKROSTRUKTURPHYS, D-06120 HALLE, GERMANY

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1997年 / 76卷 / 06期

关键词：

D O I：

10.1080/095008397178788

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Plastic deformation experiments have been performed on Czochralski-grown decagonal Al-Ni-Co single-quasicrystals at temperatures between 780 and 860 degrees C. Compression tests at a strain rate of 10(-5) s(-1) with different orientations of the compression axis relative to the tenfold quasicrystal direction show an anisotropy of the plastic behaviour. If the compression axis is oriented parallel to the tenfold direction multiple slip and weak work hardening is observed. If the compression axis is tilted by 45 degrees, single-slip conditions and deformation softening are found. Microstructural investigation by transmission electron microscopy indicates that plastic deformation is mediated by a dislocation mechanism. The results are interpreted in terms of a model in which the chemically ordered columnar clusters of the decagonal structure represent rate-controlling obstacles.

引用

页码：369 / 375

页数：7

共 21 条

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