<strong>Fe</strong>微合金化对<strong>Cu‒Zr‒Al</strong>非晶合金塑性变形行为的影响及其机理

doi:10.11901/1005.3093.2020.444

材料研究学报

2021, Vol. 35

Issue (11): 850-856 DOI: 10.11901/1005.3093.2020.444

研究论文

本期目录 | 过刊浏览

Fe微合金化对Cu‒Zr‒Al非晶合金塑性变形行为的影响及其机理

邢栋¹, 陈双双¹^,²(

), 宋佩頔¹, 齐凯¹, 尹俊¹, 李维火¹^,²

^1.安徽工业大学材料科学与工程学院马鞍山 243002
^2.安徽工业大学教育部先进金属材料绿色制造与表面技术重点实验室马鞍山 243002

Effect of Fe Microalloying on Plastic Deformation Behavior of Cu-Zr-Al Metallic Glasses

XING Dong¹, CHEN Shuangshuang¹^,²(

), SONG Peidi¹, QI Kai¹, YIN Jun¹, LI Weihuo¹^,²

^1.School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan 243002, China
^2.Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Anhui University of Technology, Ministry of Education, Ma'anshan 243002, China

引用本文:

邢栋, 陈双双, 宋佩頔, 齐凯, 尹俊, 李维火. Fe微合金化对Cu‒Zr‒Al非晶合金塑性变形行为的影响及其机理[J]. 材料研究学报, 2021, 35(11): 850-856.
Dong XING, Shuangshuang CHEN, Peidi SONG, Kai QI, Jun YIN, Weihuo LI. Effect of Fe Microalloying on Plastic Deformation Behavior of Cu-Zr-Al Metallic Glasses[J]. Chinese Journal of Materials Research, 2021, 35(11): 850-856.

全文: PDF(7802 KB) HTML

摘要:

用铜模喷铸法制备Cu_(47.8－_x₎Zr_46.2Al₆Fe_x(x=0, 0.8, 1.2, 1.6)系列合金，研究了Fe微合金化对其非晶形成能力和力学性能的影响。结果表明：随着微量元素Fe含量的提高合金的玻璃形成能力降低，而其室温塑性变形能力明显提高；随着Fe含量的提高基体中产生了更多的自由体积，且Fe与Cu的正混合焓使基体中成分/自由体积分布的不均匀性提高。这些因素，使高Fe含量的非晶合金具有更高的塑性变形能力。

关键词 ：金属材料, 块体非晶合金, 玻璃形成能力, 混合焓, 室温塑性, 自由体积

Abstract：

Cu_(47.8－_x₎Zr_46.2Al₆Fe_x (x=0, 0.8, 1.2, 1.6) alloy were prepared by copper-mold injection casting method and the effect of Fe microalloying on the glass-forming ability and mechanical properties of Cu_(47.8－_x₎Zr_46.2Al₆Fe_x (x=0, 0.8, 1.2, 1.6) metallic glasses were investigated. The results show that the glass-forming ability of the alloy decreases with increasing of Fe content, while the plastic deformation ability at room temperature increases obviously. It is found that with the increase of minor Fe content more free volume will be introduced into the glassy matrix, and the inhomogeneity of composition and free volume distribution in the matrix will increase as a result of the positive mixing enthalpy of Fe and Cu. These factors jointly result in enhanced plasticity of metallic glass with high Fe content.

Key words： metallic materials bulk metallic glasses glass-forming ability heat of mixing room -temperature plasticity free volume

收稿日期: 2020-10-26

ZTFLH:

TB331

基金资助:安徽省自然科学基金(1908085ME147);安徽省重点研究国际合作专项(202004b11020010);安徽省高校科学研究项目(KJ2020A0262)

作者简介: 邢栋，男，1993年生，硕士生

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图1 Cu-Zr-Al-Fe合金体系中各构成元素之间混合热(kJ/mol)的关系[16]

图2 直径为2 mm的Cu(47.8－x)Zr46.2Al6Fex (x=0, 0.8, 1.2, 1.6)铸态合金样品的XRD谱

图3 直径为2 mm的Fe0、Fe0.8和Fe1.2块体非晶合金的DSC曲线

表1 直径为2 mm的Fe0、Fe0.8和Fe1.2块体非晶合金的的热学参数

图4 直径为2 mm的Fe0、Fe0.8和Fe1.2块体非晶合金的室温压缩应力?应变曲线和其中区域“I”放大后展现的锯齿流变行为

表2 Fe0、Fe0.8和Fe1.2块体非晶合金的压缩力学性能

图5 Fe0.8和Fe1.2块体非晶合金应力下降幅度的百分比以及 Fe0.8和Fe1.2块体非晶合金弹性能释放密度与机器刚度的关系

图6 Fe0.8和Fe1.2块体非晶合金压缩变形后表面和断口的SEM形貌

图7 变形后的Fe1.2块体非晶合金的HRTEM照片以及对应的FFT图像

图8 Fe0.8和Fe1.2非晶合金玻璃转变温度前的热行为

图9 Fe0、Fe0.8和Fe1.2块体非晶合金的硬度变化折线图

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