Stick-slip dynamics in a Ni62Nb38 metallic glass film during nanoscratching

Stick-slip dynamics in a Ni62Nb38 metallic glass film during nanoscratching
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纳米划痕过程中 Ni62Nb38 金属玻璃薄膜的粘滑动力学

DOI:
10.1016/j.actamat.2017.06.061
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发表时间:
2017-09
期刊:
影响因子:
9.4
通讯作者:
Liaw P. K.
Liaw P. K.
中科院分区:
材料科学1区
文献类型:
--
作者:
Han D. X.;Wang G.;Ren J. L.;Yu L. P.;Yi J.;Hussain I.;Song S. X.;Xu H.;Chan K. C.;Liaw P. K.

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研究了Ni62Nb38非晶合金纳米划痕过程中的粘滑动力学。引入去趋势波动分析,探讨加载力对时间尺度和粘滑行为的影响。研究了侧向力信号在时间尺度上的自相似特性和复杂性。将分形维数与Hurst指数联系起来,并以正相关过程为特征,采用修正的Cauchy类模型描述随机粘滑过程。在不同的加载力的微分摩擦系数的置信区间阐明的非均匀(和均匀)的剪切分支过程中的nanoscratching过程。
Stick-slip dynamics during nanoscratching is investigated for the Ni62Nb38metallic glass. Detrended fluctuation analysis is introduced to explore the influence of loading force on the temporal scaling and stick-slip behavior. The self-similar characteristics and complexity in the temporal scale of the lateral force signal are investigated. A modified Cauchy class model is used for the stochastic stick-slip process, which connects the fractal dimension and the Hurst exponent and features the positive correlation process. The confidence intervals of the differential friction coefficient at different loading forces elucidate the inhomogeneous (and homogeneous) shear-branching processes during the nanoscratching process.
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