Microstructure controlled shear band pattern formation and enhanced plasticity of bulk metallic glasses containing in situ formed ductile phase dendrite dispersions

被引：1297

作者：

Hays, CC ^{[1
]}

Kim, CP ^{[1
]}

Johnson, WL ^{[1
]}

机构：

[1] CALTECH, Keck Lab Engn Mat, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.84.2901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Results are presented for a ductile metal reinforced bulk metallic glass matrix composite based on glass forming compositions in the Zr-Ti-Cu-Ni-Be system. Primary dendrite growth and solute partitioning in the molten state yields a microstructure consisting of a ductile crystalline Ti-Zr-Nb beta phase, with bce structure, in a Zr-Ti-Nb-Cu-Ni-Be bulk metallic glass matrix. Under unconstrained mechanical loading organized sheer band patterns develop throughout the sample. This results in a dramatic increase in the plastic strain to failure, impact resistance, and toughness of the metallic glass.

引用

页码：2901 / 2904

页数：4

共 9 条

[1]

AZAROFF L, 1958, POWDER METHOD XRAY C, P238

[2] The dynamic compressive behavior of beryllium bearing bulk metallic glasses [J].