高径比对W纤维/Zr基非晶复合材料压缩性能的影响*

doi:10.11901/1005.3093.2016.157

材料研究学报

2016, Vol. 30

Issue (8): 575-580 DOI: 10.11901/1005.3093.2016.157

本期目录 | 过刊浏览

高径比对W纤维/Zr基非晶复合材料压缩性能的影响*

张波^1,², 谢博文¹, 付华萌², 张海峰²

1. 沈阳航空航天大学材料科学与工程学院沈阳 110136
2. 中国科学院金属研究所沈阳 110016

Effect of Length to Diameter Ratio on Compressive Properties of W Fiber/Zr-based Metallic Glass Composite

ZHANG Bo^1,^2,^**, XIE Bowen¹, FU Huameng², ZHANG Haifeng²

1. School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang, 110136, China
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

张波, 谢博文, 付华萌, 张海峰. 高径比对W纤维/Zr基非晶复合材料压缩性能的影响*[J]. 材料研究学报, 2016, 30(8): 575-580.
Bo ZHANG, Bowen XIE, Huameng FU, Haifeng ZHANG. Effect of Length to Diameter Ratio on Compressive Properties of W Fiber/Zr-based Metallic Glass Composite[J]. Chinese Journal of Materials Research, 2016, 30(8): 575-580.

全文: PDF(2990 KB) HTML

摘要:

采用渗流铸造法制备W纤维/Zr基非晶复合材料, 研究高径比的变化对复合材料室温压缩力学性能的影响。结果表明, 复合材料的屈服强度随样品高径比的增大先降低, 高径比大于1时趋于平稳。高径比大于或等于1.25时, 复合材料的压缩塑性应变变化不大。高径比小于1.25时, 复合材料的压缩塑性应变均大于50%。压头与样品端部摩擦力的作用、W纤维之间非晶丝高径比的变化和W纤维与非晶基体之间变形的不匹配综合作用最终导致小高径比的复合材料样品具有更好的压缩力学性能。

关键词 ：金属材料, W纤维/Zr基非晶复合材料, 高径比, 屈服强度, 压缩塑性, 剪切带

Abstract：

The W fiber/Zr-based metallic glass composite was prepared by infiltration and rapid solidification. The effect of the ratios of length to diameter of fibers on the compressive properties of the composite was investigated in detail. The results show that the yield strength firstly decreases with the increase of the length to diameter ratio then reaches a stable value when the ratio is greater than 1. The plastic strain has no obvious change when the ratio is greater than or equal to 1.25, while the plastic strain is bigger than 50% when the ratio is smaller than 1.25. The reason for these phenomena is the comprehensive effect of the friction force between pressure head and the end of the compressive sample, the change of the length to diameter ratio of the metallic glass fibers between W fibers and the mismatching between metallic glass matrix and the W fiber during deformation.

Key words： metallic materials W fiber/Zr-based metallic glass composite aspect ratio yield strength compressive plasticity shear band

收稿日期: 2016-03-23

基金资助:* 国家自然科学基金51401131资助项目

作者简介: 本文联系人: 张波

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.157 或 https://www.cjmr.org/CN/Y2016/V30/I8/575

图1 Zr基非晶和W纤维/Zr基非晶复合材料的XRD衍射谱

图2 不同高径比的Zr基非晶合金、W棒以及W纤维/Zr基非晶合金复合材料的压缩应力应变曲线

图3 压缩屈服强度随样品高径比的变化关系

图4 Zr基非晶合金变形后侧表面的剪切带形貌

图5 W纤维/Zr基非晶复合材料变形后侧表面的剪切带和裂纹形貌

图6 不同高径比的非晶合金压缩过程中剪切带扩展示意图

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