Study of serrated flow and plastic deformation in metallic glasses through instrumented indentation
Study of serrated flow and plastic deformation in metallic glasses through instrumented indentation
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通过仪器压痕研究金属玻璃中的锯齿状流动和塑性变形
DOI：
10.1016/j.intermet.2006.10.010
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发表时间：
2007-05-01
期刊：
影响因子：
4.4
通讯作者：
Wang, Y. R.
中科院分区：
文献类型：
--
作者：
Li, W. H.;Wei, B. C.;Wang, Y. R.
采用压痕法研究了7种大块金属玻璃（BMG）系统的塑性变形行为和锯齿状流动。这些材料包括Ce 65 Al 10 Ni 10 Cu 10 Nb 5、Mg 65 Cu 25 Gd 10、Pd 43 Ni 10 Cu 27 P20、Cu 60 Zr 20 Hf 10 Ti 10、Pt57.5Cu14.7Ni5.3P22.5、N60 Nb 37 Sn 3和Fe 43 Cr 16 Mo 16 C15 B10 BMG，其在0.33K/s的加热速率下显示出360至908 K的玻璃化转变温度（T-g）。在纳米压痕过程中的载荷-深度曲线中，这些BMG之间的变形行为存在显着差异。在加载过程中，Mg基、Pt基和Pd基BMG（介质7）中观察到明显的锯齿状流动，而Ce基、Ni基和Fe基BMG（T-g）中没有观察到明显的锯齿状流动。在较低Tg的合金中，剪切带镦粗的尺寸较大。讨论了玻璃化转变温度对剪切带的作用以及不同非晶合金体系中锯齿形流动行为的影响。(c)2006爱思唯尔有限公司保留所有权利。
The plastic deformation behavior and serrated flow in seven bulk metallic glass (BMG) systems were investigated through instrumented indentation. These materials include Ce65Al10Ni10Cu10Nb5, Mg65Cu25Gd10, Pd43Ni10Cu27P20, Cu60Zr20Hf10Ti10, Pt57.5Cu14.7Ni5.3P22.5, N60Nb37Sn3 and Fe43Cr16Mo16C15B10 BMGs, which show a glass transition temperature (T-g) ranging from 360 to 908 K at a heating rate of 0.33 K/s. Remarkable difference in deformation behavior was found among these BMGs in the load-depth curves during nanoindentation. Prominent serrations are observed in Mg-, Pt- and Pd-based BMGs with medium 7, during the loading process, whereas no distinct serrated flow was found in Ce-, Ni- and Fe-based BMGs with quite low or high T-g, The subsurface Plastic deformation regions after indentation were investigated using depth-sensing microindentation to characterize the shear band feature developed in various BMG systems. The size of the shear band upset is found to be larger in the alloys with lower T-g. The effect of T-g on the operation of shear bands and the serrated flow behavior in various BMG systems were discussed. (c) 2006 Elsevier Ltd. All rights reserved.