Rejuvenation of Zr-Based Bulk Metallic Glasses by Ultrasonic Vibration-Assisted Elastic Deformation.
Rejuvenation of Zr-Based Bulk Metallic Glasses by Ultrasonic Vibration-Assisted Elastic Deformation.
复制标题
超声波振动辅助弹性变形再生锆基大块金属玻璃
DOI：
10.3390/ma13194397
复制
发表时间：
2020-10-02
期刊：
影响因子：
--
通讯作者：
Ma J
中科院分区：
文献类型：
--
作者：
Lou Y;Xv S;Liu Z;Ma J
采用超声振动辅助弹性变形（UVEF）对Zr52.5Cu17.9Ni14.6Al10Ti5大块金属玻璃（bmg）进行了回弹研究。与铸态相比，uvef处理后的试样表现出明显的回复性，松弛焓更高，过冷液区范围更小。回火非晶合金的断裂以韧性断裂为主，变形区发生剪切变形。随着振幅的增大，回火非晶合金的自由体积增大，屈服强度和弹性模量减小，成形性提高。以自由体积含量作为表征再生程度的指标，建立了超声振幅与自由体积关系的数学模型。此外，超声振动应力诱导zr基块体金属玻璃的额外自由体积，改善了其塑化性能。超声波热效应引起的温升不会引起额外的自由体积。
The rejuvenation of Zr52.5Cu17.9Ni14.6Al10Ti5 bulk metallic glasses (BMGs) by ultrasonic vibration-assisted elastic deformation (UVEF) was studied herein. The UVEF-treated samples demonstrate an obvious rejuvenation and have a higher relaxation enthalpy and a smaller range of supercooled liquid regions than the as-cast samples. The fracture of the rejuvenated amorphous alloy is mainly ductile fracture, and shear deformation occurs in the deformation region. It is also found that as the amplitude increases, the free volume of the rejuvenated amorphous alloy increases, the yield strength and the elastic modulus decrease, and the formability increases. The free-volume content is used to characterize the degree of rejuvenation, and a mathematical model of the relationship between the ultrasonic amplitude and free volume is established. In addition, it is found that the ultrasonic vibration stress induces the additional free volume in the Zr-based bulk metallic glasses and improves the plasticizing behavior. The temperature rise caused by the ultrasonic thermal effect does not induce additional free volume.
登录
查看更多内容
影响因子：
4.4
作者：
Guo, Wei;Yamada, Rui;Saida, Junji
通讯作者：
Saida, Junji
通过振动加载增强过冷液态锆基大块金属玻璃的成型性
影响因子：
9.4
作者：
Li, Ning;Xu, Xiaona;Liu, Lin
通讯作者：
Liu, Lin
影响因子：
5.5
作者：
Saida J;Yamada R;Wakeda M;Ogata S
通讯作者：
Ogata S
超声波振动预压缩诱导大块金属玻璃快速再生
影响因子：
4.4
作者：
Lou, Yan;Liu, Xiao;Liu, Zhiyuan
通讯作者：
Liu, Zhiyuan
影响因子：
4.4
作者：
Nieh, TG;Schuh, C;Li, Y
通讯作者：
Li, Y