Formation of Cu-Zr-Al bulk metallic glass composites with improved tensile properties

被引：305

作者：

Wu, Y. ^{[1
]}

Wang, H. ^{[1
]}

Wu, H. H. ^{[1
]}

Zhang, Z. Y. ^{[1
]}

Hui, X. D. ^{[1
]}

Chen, G. L. ^{[1
]}

Ma, D. ^{[2
]}

Wang, X. L. ^{[2
]}

Lu, Z. P. ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

来源：

ACTA MATERIALIA | 2011年 / 59卷 / 08期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Bulk amorphous materials; Composites; Metastable phase; Mechanical properties; Martensitic phase transformation; INDUCED MARTENSITIC-TRANSFORMATION; MATRIX COMPOSITES; COMPRESSIVE DEFORMATION; MECHANICAL-PROPERTIES; AMORPHOUS-ALLOYS; HIGH-STRENGTH; SHEAR-BAND; DUCTILITY; PLASTICITY; BEHAVIOR;

D O I：

10.1016/j.actamat.2011.01.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dependence of microstructure on the alloy composition and cooling rate of a series of (Zr0.5Cu0.5)(100-x)Al-x (x = 1, 2, 3, ..., 10 at.%) alloys was investigated in detail and explained in the framework of time temperature transformation diagrams. The relationship between the microstructures of bulk metallic glass (BMG) composites and their mechanical properties was characterized systematically. It was found that the addition of aluminum can promote the formation of the metastable austenitic CuZr phase, and composite structures with B2-CuZr particles can be formed in alloys containing 3-8% Al. Both the volume fraction and distribution of the reinforced B2 phase could greatly affect the deformation behavior, and the BMG composites with homogeneously distributed single B2-CuZr phase exhibited stable tensile ductility. Analysis indicates that the B2-CuZr austenite transformed into the B19' martensite during deformation (i.e., stress-induced martensitic transformation), which accounts for the observed superior mechanical properties of the current BMG composites. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2928 / 2936

页数：9

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