原位自生富Ta相增强锆基非晶复合材料及其力学性能  

In-Situ Ta-Rich Particle Reinforced Zr-Based Bulk Metallic Glass Matrix Composites and Their Mechanical Properties

作　　者：刘凯 张磊 陈忠维 吕书林 郭威[2,3,4] LIU Kai;ZHANG Lei;CHEN Zhong-wei;LYU Shu-lin;GUO Wei(China Coast Guard Academy,Ningbo 31500o,Zhejiang,China;State Key Laboratory of Material Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,Hunan,China;Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,Guangdong,China)

机构地区：[1]中国人民武装警察部队海警学院机电管理系,浙江宁波315000 [2]华中科技大学材料成形与模具技术国家重点实验室材料科学与工程学院,湖北武汉430074 [3]湖南大学汽车车身设计及制造国家重点实验室,湖南长沙410082 [4]深圳华中科技大学研究院,广东深圳518057

出　　处：《铸造》2022年第9期1101-1104,共4页Foundry

基　　金：“十三五”双重项目;国家自然科学基金(52101138);湖北省自然科学基金(2020CFB259);新金属材料国家重点实验室开放基金(2020-Z01);金属材料强度国家重点实验室开放基金(20202205);广东省基础与应用基础研究基金(2020A1515110531);汽车车身设计及制造国家重点实验室开放基金(32015001);华中科技大学人才引进经费(3004110125、3004110142)。

摘　　要：利用元素微添加法成功在锆基非晶基体中引入了原位自生富Ta增强相。富Ta相分布均匀、平均尺寸及颗粒间距与基体的特性塑性加工区尺寸相近。复合材料表现出优异的综合力学性能,包括高断裂强度及大断裂塑性。原位自生富Ta相可有效阻碍基体中主剪切带的迅速扩展,造成主剪切带的分枝及增殖,产生多重剪切带。同时,富Ta相本身变形及硬化行为对整体变形也做出了贡献。In-situ Ta-rich particle reinforced Zr-based bulk metallic glass matrix composite has been successfully fabricated by doping Ta.The dispersion of Ta particles was quite homogenous.The size and inter-particle spacing of the Ta particles were very close to the plastic processing zone size.The composites show excellent mechanical properties,including high fracture strength and large plastic strain.The Ta-rich particles can hinder the rapid propagation of main shear band,generating multiple shear bands.The deformation of Ta-rich phase itself also contributes to the plasticity and hardening behavior of the composite.

关 键 词：金属玻璃 复合材料 塑性 剪切带 

分 类 号：TG146.2[一般工业技术—材料科学与工程]