Room temperature plastic deformation behavior of ZrCuNiAl bulk metallic glasses  

作　　者：Ping-jun Tao Yuan-zheng Yang Xiao-jun Bai Zhi-wei Xie Xian-chao Chen 

机构地区：[1]Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China [2]College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2010年第3期327-330,共4页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos50971046,50771037,and 50371020);the Doctoral Fund of the Ministry of Education of China (No200805620004)

摘　　要：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 indenta- tion 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.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 indenta- tion 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.

关 键 词：bulk metallic glass plastic deformation shear bands compression INDENTATION 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG146.23[金属学及工艺—合金]