Creep of nanocrystalline nickel: A direct comparison between uniaxial and nanoindentation creep
Creep of nanocrystalline nickel: A direct comparison between uniaxial and nanoindentation creep
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DOI：
10.1016/j.scriptamat.2009.10.021
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发表时间：
2010-02
影响因子：
6
通讯作者：
C. L. Wang;Y. Lai;J. Huang;T. Nieh
中科院分区：
文献类型：
--
作者：
C. L. Wang;Y. Lai;J. Huang;T. Nieh
在398K下，对纳米晶镍进行了单轴蠕变和纳米压痕蠕变，并对实验结果进行了比较。两种试验条件下的应力指数基本相同，表明蠕变机理相似。然而，纳米压痕蠕变测量的应变速率比单轴蠕变测量的应变速率快约100倍。从应力状态和Tabor因子的适当选择两个方面讨论了速率差异。
Uniaxial and nanoindentation creeps were conducted on nanocrystalline nickel with an as-deposited grain size of 14nm at 398K and the results were directly compared. The stress exponent under the two test conditions was found to be almost the same, indicating a similar creep mechanism. However, the strain rate measured by nanoindentation creep was about 100 times faster than that by uniaxial creep. The rate difference was discussed in terms of stress states and the appropriate selection of the Tabor factor.