Room temperature plastic deformation behavior of ZrCuNiAl bulk metallic glasses |
| |
Authors: | Ping-jun Tao Yuan-zheng Yang Xiao-jun Bai Zhi-wei Xie Xian-chao Chen |
| |
Institution: | (1) School of Mechanical Engineering, North China University of Water Conservancy and Electric Power, Zhengzhou, 450011, China;(2) Joint Laboratory of Nanostructured Materials and Technology, Nanjing University of Science and Technology, Nanjing, 210094, China;(3) State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China |
| |
Abstract: | The Zr62.55Cu17.55Ni9.9Al10 bulk metallic glass (BMG) was prepared by using copper-mold suction-casting. X-ray diffraction and differential scanning
calorimetry were utilized to determine its structure and thermal stability. Uniaxial compression and Rockwell indentation
tests were adopted to study the plastic deformation behavior at room temperature. The results show that the glass transition
temperature and the onset temperature of exothermic reaction of the BMG are 651.5 and 748 K, respectively. During the compression
test, the BMGs undergo an engineering strain of about 2.5%, i.e., true strain of 2.8%, and then fracture. The BMGs deform via the formation and propagation of shear bands. Under indentation loading, the BMGs deform through the formation of radiation-like
and circular shear bands. The circular shear bands form earlier than the radiation-like ones. The formation mechanism of shear
bands in the BMGs was analyzed and discussed. |
| |
Keywords: | |
本文献已被 万方数据 SpringerLink 等数据库收录! |
| 点击此处可从《矿物冶金与材料学报》浏览原始摘要信息 |
| 点击此处可从《矿物冶金与材料学报》下载免费的PDF全文 |
|