添加稀土Dy对Cu50Zr46Al4合金的非晶形成能力和力学性能的影响

doi:10.11901/1005.3093.2020.063

材料研究学报

2020, Vol. 34

Issue (8): 605-610 DOI: 10.11901/1005.3093.2020.063

研究论文

本期目录 | 过刊浏览

添加稀土Dy对Cu₅₀Zr₄₆Al₄合金的非晶形成能力和力学性能的影响

李冬梅¹, 谭力铭¹, 赵晴¹, 谢晗晞¹, 余鹏¹(

), 夏雷²

1 重庆师范大学物理与电子工程学院光电功能材料重庆市重点实验室重庆 401331
2 上海大学材料研究所上海大学微结构重点实验室上海 200072

Effect of Dy Addition on Glass-forming Ability and Mechanical Properties of Cu₅₀Zr₄₆Al₄ Bulk Metallic Alloy

LI Dongmei¹, TAN Liming¹, ZHAO Qing¹, XIE Hanxi¹, YU Peng¹(

), XIA Lei²

1 College of Physics and Electronic Engineering Chongqing Normal University, Chongqing Key Laboratory of Photo-Electric Functional Materials, Chongqing 401331, China
2 Laboratory for Microstructure & Institute of Materials, Shanghai University, Shanghai 200072, China

引用本文:

李冬梅, 谭力铭, 赵晴, 谢晗晞, 余鹏, 夏雷. 添加稀土Dy对Cu₅₀Zr₄₆Al₄合金的非晶形成能力和力学性能的影响[J]. 材料研究学报, 2020, 34(8): 605-610.
Dongmei LI, Liming TAN, Qing ZHAO, Hanxi XIE, Peng YU, Lei XIA. Effect of Dy Addition on Glass-forming Ability and Mechanical Properties of Cu₅₀Zr₄₆Al₄ Bulk Metallic Alloy[J]. Chinese Journal of Materials Research, 2020, 34(8): 605-610.

全文: PDF(3891 KB) HTML

摘要:

使用铜模吸铸法制备Cu_50-_xZr₄₆Al₄Dy_x(x=0~4)系列合金,研究了Dy对其非晶形成能力和力学性能的影响。结果表明,添加1%~2%(原子分数)的Dy能明显提高Cu_50-_xZr₄₆Al₄Dy_x合金的热稳定性和非晶形成能力。添加适量的Dy能提高体系的强度和塑性变形能力。还讨论了添加Dy元素影响Cu_50-_xZr₄₆Al₄Dy_x体系非晶形成能力和力学性能的机理。

关键词 ：金属材料, 镝添加, 微合金化, 非晶形成能力, 力学性能

Abstract：

A series of Cu_50-_xZr₄₆Al₄Dy_x(x=0~4) alloys is prepared by copper mold casting based on Cu₅₀Zr₄₆Al₄ bulk metallic glass (BMG). The effect of Dy addition on the glass forming ability and mechanical properties of Cu_50-_xZr₄₆Al₄Dy_x alloy was investigated through thermodynamics and mechanical experiments. It is found that 1%~2% (atomic fraction) Dy addition can significantly improve the thermal stability of Cu_50-_xZr₄₆Al₄Dy_x, and the glass forming ability of the alloy. The strength and plastic deformation ability of the alloy can be improved effectively by proper Dy addition. The influence of Dy addition on the glass forming ability and mechanical properties of Cu_50-_xZr₄₆Al₄Dy_x is also discussed.

Key words： metallic materials Dy addition micro-alloying glass-forming ability mechanical properties

收稿日期: 2020-02-27

ZTFLH:

TB31

基金资助:重庆市基础研究与前沿探索项目(cstc2018jcyjAX0329);重庆市基础研究与前沿探索项目(cstc2018jcyjAX0444);重庆市教委科学技术研究重点项目(KJZD-K201900501)

作者简介: 李冬梅,女,1988年生,博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.063 或 https://www.cjmr.org/CN/Y2020/V34/I8/605

图1 不同直径Cu50-xZr46Al4Dyx(x=0~4)试样的XRD图谱

表1 不同直径Cu50-xZr46Al4Dyx(x=0,1,2,3,4)试样的结构

图2 直径为1.5 mm的Cu50-xZr46Al4Dyx(x=0,1,2,3)的合金样品升温速率为20 K/min时的DSC和DTA曲线

表2 直径为1.5 mm的Cu50-xZr46Al4Dyx(x=0~4)BMG样品的热学参数

图3 1.5 mm直径Cu50-xZr46Al4Dyx(x=0~4)BMG试样的室温压缩应力-应变曲线

表3 直径为1.5 mm的Cu50-xZr46Al4Dyx(x=0~4)BMG的室温压缩力学参数

图4 直径1.5 mm的Cu50-xZr46Al4Dyx(x=0~4)BMG的压缩断裂形貌

图5 直径为1.5 mm和3 mm的Cu50-xZr46Al4Dyx(x=0~4)BMG试样的维氏硬度随Dy含量的变化

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