Tailoring of in situ Ti-based bulk glassy matrix composites with high mechanical performance

被引：17
|
作者：
Park, J. M. [1 ,3 ]
Jayaraj, J. [2 ]
Kim, D. H. [3 ]
Mattern, N. [1 ]
Wang, G. [1 ]
Eckert, J. [1 ,4 ]
机构：
[1] IFW Dresden, Inst Complex Mat, D-01171 Dresden, Germany
[2] IFW Dresden, Inst Metall Mat, D-01171 Dresden, Germany
[3] Yonsei Univ, Dept Met Engn, Ctr Noncrystalline Mat, Seoul 120749, South Korea
[4] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany
来源：
INTERMETALLICS | 2010年 / 18卷 / 10期
关键词：
Composites; Alloy design; Casting; Microstructure; METALLIC-GLASS; PLASTICITY; TENSILE; DUCTILE; DEFORMATION; ENHANCEMENT; BEHAVIOR;
D O I：
10.1016/j.intermet.2010.02.029
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study, we developed ductile dendrite-reinforced composites in the Ti-Zr-Ni-Cu-Be-(Nb) system. Although in situ composites have been successfully obtained by optimizing alloy composition and cooling rate, plasticity does not always occur. Only when the size, distribution, and elastic constants of the constituent phases are properly controlled, i.e. by creating homogeneously distributed dendrites with lower shear modulus than the glassy matrix, the composites exhibit large plasticity. By controlling the microstructural length scale and by tuning the intrinsic elastic constants of the constituent phases Ti-based bulk glassy matrix composites with good mechanical performance (high yield strength of similar to 1.7 GPa and large plasticity of similar to 25%) have been achieved. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1908 / 1911
页数：4
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