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材料导报  2023, Vol. 37 Issue (4): 21080252-7    https://doi.org/10.11896/cldb.21080252
  金属与金属基复合材料 |
半固态等温热处理对Zr基非晶复合材料塑性变形机制的影响
杨湘杰1,2,*, 杨颜1,2, 刘军1,2, 史坤1,2, 郑彬1,2
1 南昌大学机电工程学院,南昌 330031
2 江西省高性能精确成形实验室,南昌 330031
Effect of Semi-solid Isothermal Treatment on the Microstructure of Plastic Deformation of Zr-based Bulk Metallic Glass Matrix Composites
YANG Xiangjie1,2,*, YANG Yan1,2, LIU Jun1,2, SHI Kun1,2, ZHENG Bin1,2
1 School of Mechanical and Electrical Engineering, University of Nanchang, Nanchang 330031, China
2 Jiangxi Province High Performance Precision Forming Laboratory, Nanchang 330031, China
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摘要 通过添加不同体积分数的Nb,本工作设计了一系列Zr基非晶复合材料,主要研究了Nb含量对铸态、半固态非晶复合材料的微观组织及塑性性能的影响。结果表明:非晶复合材料塑性应变量随晶体相(β-Zr相)体积分数增加而呈现S型增强规律。半固态等温处理后的非晶复合材料塑性提升,但其塑性增长率随Nb含量增加而减小。当DC(当量直径)/X(平均自由程间距)≥0.65时,β-Zr相体积分数出现最小临界阈值35%,此时材料塑性开始迅速提升;DC/X≥1.5时,β-Zr相体积分数超过54%后,材料塑性保持稳定,进一步说明非晶复合材料塑性与β-Zr相体积分数有关。
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杨湘杰
杨颜
刘军
史坤
郑彬
关键词:  块体非晶复合材料  半固态等温热处理  微观结构  剪切带    
Abstract: A series of Zr-based bulk metallic glasses matrix composites were designed by adding Nb with different volume fractions. The effect of Nb content on the microstructure and mechanical properities of as-cast and semi-solid amorphous composite materials were studied. It is demonstrated that the plastic strain of the amorphous composite material exhibits an S-type enhancement trend with the increase of the volume fraction of the crystalline phase (β-Zr phase). After the semi-solid isothermal treatment, the plasticity of the amorphous composite material increases, but its plastic growth rate decreases with the increase of Nb content. When DC(equivalentdiameter)/X(free-pathspacing)≥0.65, the β-Zr phase volume fraction appears the minimum critical threshold of 35%, and the material plasticity begins to increase rapidly at this time; the β-Zr phase volume fraction exceeds 54%, for DC/X≥1.5, and the plasticity of the material remains stable, which further shows that the plasticity of amorphous composites is related to the volume fraction of β-Zr phase.
Key words:  bulk metallic glass composites    semi-solid isothermal treatment    microstructure    shear band
出版日期:  2023-02-25      发布日期:  2023-03-02
ZTFLH:  TG139.8  
基金资助: 国家自然科学基金(11364031)
通讯作者:  * 杨湘杰,1999年5月毕业于上海大学,获得博士学位。研究方向为非晶合金及半固态精密材料成型。先后负责四项国家基金项目,获得发明专利15项,实用新型专利10项。迄今为止,已发表学术论文70余篇。yangxj@ncu.edu.cn   
引用本文:    
杨湘杰, 杨颜, 刘军, 史坤, 郑彬. 半固态等温热处理对Zr基非晶复合材料塑性变形机制的影响[J]. 材料导报, 2023, 37(4): 21080252-7.
YANG Xiangjie, YANG Yan, LIU Jun, SHI Kun, ZHENG Bin. Effect of Semi-solid Isothermal Treatment on the Microstructure of Plastic Deformation of Zr-based Bulk Metallic Glass Matrix Composites. Materials Reports, 2023, 37(4): 21080252-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21080252  或          http://www.mater-rep.com/CN/Y2023/V37/I4/21080252
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