Mechanical properties of Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 ductile phase reinforced bulk metallic glass composite
Mechanical properties of Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 ductile phase reinforced bulk metallic glass composite
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DOI：
10.1016/s1359-6454(01)00068-4
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发表时间：
2001-05-25
期刊：
影响因子：
9.4
通讯作者：
Johnson, WL
中科院分区：
文献类型：
--
作者：
Szuecs, F;Kim, CP;Johnson, WL
采用快淬法对均匀的Zr 56.2Ti 13.8Nb 5.0Cu 6.9Ni 5.6Be 12.5合金熔体进行原位反应，制备了含韧性相的大块非晶复合材料。通过SEM、X射线衍射和微探针分析研究了所得两相材料的微观结构。复合材料，以及相应的基体和第二相组合物的单相材料，在单轴拉伸和压缩测试。通过超声声速测量分析了弹性模量、剪切模量和泊松比。该复合材料表现出显着改善的夏比冲击韧性（与Vitreloy 1相比，提高了2.5倍）和延展性（压缩时平均断裂应变高达8.3%，拉伸时平均断裂应变高达5.5%）。这些显着的改进可以通过机械柔软且韧性的第二相的作用来解释，该第二相具有稳定剪切局部化和临界裂纹扩展的作用。(C)2001 Acta Materialia Inc.出版社：Elsevier Science Lid All rights reserved.
Ductile phase containing bulk metallic glass composites are prepared via an in situ method by rapid quenching of a homogenous Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 melt. The microstructure of the resulting two phase material is investigated by SEM, X-ray diffraction, and microprobe analysis. The composite material, as well as single phase materials with the corresponding matrix and second phase compositions, are tested in uniaxial tension and compression. Young's Modulus, shear modulus and Poisson ratios are analyzed by ultrasonic sound velocity measurements. The composite material demonstrates strongly improved Charpy impact toughness (by a factor of 2.5 compared to Vitreloy 1) and ductility (average fracture strain up to 8.3% in compression and 5.5% in tension). These remarkable improvements are explained by the effect of the mechanically soft and ductile second phase, which acts stabilizing against shear localization and critical crack propagation. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Lid. All rights reserved.