Thermal Stability and Transformation-mediated Deformability of Cu-Zr-Al-Ni Bulk Metallic Glass Composite  

作　　者：Meiting Xie Pengna Zhang Kaikai Song 

机构地区：[1]School of Mechanical Engineering, Binzhou Polytechnic [2]College of Math and Physics, Nanjing University of Information Science and Technology [3]IFW Dresden, Institut für Komplexe Materialien [4]TU Dresden, Institut für Werkstoffwissenschaft

出　　处：《Journal of Materials Science & Technology》2013年第9期868-872,共5页材料科学技术（英文版）

基　　金：supported by the Chinese Scholarship Council (CSC);the Natural Science Foundation of Shandong Province (No. Z2008F08);the Excellent Youth Project of the Natural Science Foundation of Shandong Province (No. JQ201012);the National Basic Research Program of China (973 Program, No. 2007CB613901);the National Natural Science Foundation of China (Nos. 50631010 and 50831003)

摘　　要：The glass-forming ability and the thermal stability of Cu45Zr45AI5Ni5 metallic glass were systematically investigated by the differential scanning calorimetry. The activation energies for the glass transition and the onset crystallization and the crystallization peak were calculated to be 255.1, 308.7 and 311.5 kJ/mol, respectively, while the corresponding liquid fragility was determined to be 23.4. By controlling the casting process, Cu45Zr45AI5Ni5 bulk metallic glass composite with the presence of ductile B2 CuZr phase was fabricated. The composite shows a pronounced plastic strain of 6.8 ~ 0.05% with obvious work hardening, which results from the formation of multiple shear bands and the deformation-induced martensitic transformation.The glass-forming ability and the thermal stability of Cu45Zr45AI5Ni5 metallic glass were systematically investigated by the differential scanning calorimetry. The activation energies for the glass transition and the onset crystallization and the crystallization peak were calculated to be 255.1, 308.7 and 311.5 kJ/mol, respectively, while the corresponding liquid fragility was determined to be 23.4. By controlling the casting process, Cu45Zr45AI5Ni5 bulk metallic glass composite with the presence of ductile B2 CuZr phase was fabricated. The composite shows a pronounced plastic strain of 6.8 ~ 0.05% with obvious work hardening, which results from the formation of multiple shear bands and the deformation-induced martensitic transformation.

关 键 词：Amorphous Activation energy Martensitic transformation Mechanical properties 

分 类 号：TB331[一般工业技术—材料科学与工程]