添加<strong>Nb</strong>元素对<strong>TiZr</strong>基非晶复合材料性能的影响

doi:10.11901/1005.3093.2021.174

材料研究学报

2022, Vol. 36

Issue (6): 401-408 DOI: 10.11901/1005.3093.2021.174

研究论文

本期目录 | 过刊浏览

添加Nb元素对TiZr基非晶复合材料性能的影响

张益铭, 赵子彦, 牟娟(

)

材料各向异性与织构教育部重点实验室东北大学材料科学与工程学院沈阳 110004

Effect of Nb Addition on Properties of TiZr-based Amorphous Alloys

ZHANG Yiming, ZHAO Ziyan, MU Juan(

)

Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Sciences and Engineering, Northeastern University, Shenyang 110004, China

引用本文:

张益铭, 赵子彦, 牟娟. 添加Nb元素对TiZr基非晶复合材料性能的影响[J]. 材料研究学报, 2022, 36(6): 401-408.
Yiming ZHANG, Ziyan ZHAO, Juan MU. Effect of Nb Addition on Properties of TiZr-based Amorphous Alloys[J]. Chinese Journal of Materials Research, 2022, 36(6): 401-408.

全文: PDF(4251 KB) HTML

摘要:

使用铜模铸造法制备(Ti_45.7Zr₃₃Ni₃Cu_5.8Be_12.5)_(1-0.01_x₎Nb _x (x=0、2、4、6、8和10,记为Nb0、Nb2、Nb4、Nb6、Nb8和Nb10)的TiZr基非晶合金复合材料,研究了添加Nb元素对TiZr基非晶复合材料性能的影响。结果表明,Nb元素含量的提高使材料中β相的晶粒尺寸更大、体积分数提高和形变诱发马氏体相变受到抑制。Nb元素的添加,使这种非晶复合材料的塑性大大提高,而屈服强度降低。值得注意的是,Nb元素的添加还提高了非晶复合材料力学性能的可重复性。在Nb0~Nb4等具有形变诱发相变的非晶复合材料生成的小板条α''马氏体,能诱导多重剪切带的生成。在Nb6~Nb10这种未发生形变诱发相变行为的非晶复合材料中,大量位错在β相中产生并在界面处积累形成位错台阶,从而引发多重剪切带的形成,最终使非晶复合材料的塑性提高。

关键词 ：复合材料, 力学性能, 微观结构表征, 形变诱发相变行为, Nb元素添加

Abstract：

TiZr-based amorphous alloys with different Nb amount, given by (Ti_45.7Zr₃₃Ni₃Cu_5.8Be_12.5)_(1-0.01_x₎Nb _x (x=0, 2, 4, 6, 8, and 10, denoted as Nb0, Nb2, Nb4, Nb6, Nb8, and Nb10) were prepared via copper mold casting method. Then the effect of Nb addition on the performance of the alloys was investigated by means of uniaxial compression testing, XRD, TEM and SEM+EDS. The results show that with the increasing Nb content the grain size and volume fraction of the β-phase increased, but the deformation-induced martensitic transformation was suppressed; The plasticity of the amorphous alloys was greatly improved, while the yield strength gradually decreased. Notably, the repeatability of the mechanical properties of the amorphous alloys was improved with the addition of Nb. For the amorphous alloys that may undergo deformation-induced phase transformation, such as Nb0~Nb4, homogenous α'' martensite with a small lath can effectively induce the formation of multiple shear bands. For the amorphous alloys that cannot undergo deformation-induced phase transformation, such as Nb6~Nb10, many dislocations may occur in the β-phase and they accumulated at boundaries to form dislocation steps, which would trigger the formation of multiple shear bands and finally improve the plasticity of amorphous alloys.

Key words： composite mechanical properties microstructure characterization deformation-induced phase transformation Nb addition

收稿日期: 2021-03-09

ZTFLH:

TG139.8

基金资助:国家自然科学基金(51771049);国家自然科学基金(51790484);冲击环境材料技术重点实验室基金(JCKYS2020602005)

作者简介: 张益铭,男,1994年生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.174 或 https://www.cjmr.org/CN/Y2022/V36/I6/401

图1 铸态TiZr基非晶复合材料的XRD谱(插图为(100) β 峰的放大示意图)和非晶复合材料中枝晶相的晶格常数

图2 铸态TiZr基非晶复合材料样品的SEM照片

表1 Nb0~Nb10样品中枝晶相的体积分数和晶粒尺寸

图3 非晶复合材料中的枝晶相和非晶基体各种元素的含量与成分的关系和Nb10样品的能谱面扫图片

图4 TiZr基非晶复合材料的力学性能变化

表2 非晶复合材料力学性能的可重复性

图5 断裂后TiZr基非晶复合材料的XRD谱

图6 Nb2和Nb6样品断裂后的明场透射电镜照片和相应的SAED图样

图7 TiZr基非晶复合材料压缩变形后其侧面多重剪切带的SEM照片

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