Effect of cooling rate on plastic deformation of Zr-based bulk metallic glasses
Effect of cooling rate on plastic deformation of Zr-based bulk metallic glasses作者机构：State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials Lanzhou University of Technology Lanzhou 730050 China Key Laboratory of Non-ferrous Metal Alloys and Processing of the Ministry of Education Lanzhou University of Technology Lanzhou 730050 China
出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))
年 卷 期：2012年第22卷第1期
页 面：21-25页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by the National Natural Science Foundation of China (Grant no. 50961008,51061008) the‘973’ Special Preliminary Program (Grant no. 2011CB612203)
主 题：Bulk metallic glasses Cooling rate Serration Plastic deformation Free volume
摘 要：The effect of cooling rate on plastic deformation of Zr-based bulk metallic glasses has been *** specimens with the diameters of 3 mm,4 mm and 6 mm cut from the same ladder-shaped Zr 55 Al 10 Ni 5 Cu 30 BMG rod were used in the present *** experimental results indicated that the different plastic strains were induced for the three type compression *** compressive plastic strain increased with the decreasing diameter for the as-cast specimens,which means that the compressive plastic strain increased with the increasing cooling *** reason of the difference is attributed to the free volume existed in the BMGs during the rapid solidification,and the larger free volume was contained in the specimen fabricated with the higher cooling *** has been found that the prominent serrations and multiple shear bands appeared during the compressive deformation tests of the specimen with smaller diameter of 3 mm,indicating that the specimen with smaller diameter exhibits better plasticity due to more free volume content.
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