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Deformation behavior during nanoindentation in Ce-based bulk metallic glasses
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  • 分类:TG139.8[金属学及工艺—合金;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构:[1]National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China, [2]State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China, [3]College of Physics and Electronic Information Science, Tianjin Norreal University, Tianjin 300072, China
  • 相关基金:Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant Nos. 50571109, 10572142 & 10372103) and the Natural Science Fund for 0utstanding Youth in Hunan Province (Grant No. 02JJYB010).
  • 相关项目:深度测量压入仪器的研制及其测试方法的研究
中文摘要:

变丑行为和装载的效果在基于 Ce 的体积在塑料变丑上评价金属性的眼镜(BMG ) 通过 nanoindentationtests 被调查。结果证明在基于 Ce 的 BMG 的塑料变丑 duringnanoindentation 大小的装载的率依赖与另外的 BMGalloys 的相对照是相当独特的。在低装载的同类的塑料变丑评估的Ce6oAl_( 15 )Cu_( 10 )Ni_( 15 ) BMG 展览的负担排水量( P-h )曲线,和突出的 serrated 以高紧张率流动,而,Ce_( 65 )Al_( 10 )GU_( 10 )Ni_( 10 ) Nb_5 的 P-h 曲线展出根本学习的同质的塑料变丑装载率。房间温度 creep 行为能清楚地在这二合金被观察。在基于 Ce 的 BMG 的唯一的塑料变丑特征的机制被学习。

英文摘要:

The deformation behavior and the effect of the loading rate on the plastic deformation in Ce-based bulk metallic glasses (BMGs) were investigated through nanoindentation tests. The results showed that the loading rate dependence of plastic deformation during nanoindentation measurements in the Ce-based BMGs is quite unique in contrast to that of other BMG alloys. The load-displacement (P-h) curves of Ce60Al15Cu10Ni15 BMG exhibit a homoge- neous plastic deformation at low loading rates, and a prominent serrated flow at high strain rates, whereas, the P-h curves of Ce65AI10Cu10Ni10Nb5 exhibit homogenous plastic deformation at all studied loading rates. The room temperature creep behavior could clearly be observed in these two alloys. The mechanism of the unique plastic deformation feature in the Ce-based BMGs was studied.

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