Indentation Creep Behavior in Ce-Based Bulk Metallic Glasses at Room Temperature
Indentation Creep Behavior in Ce-Based Bulk Metallic Glasses at Room Temperature
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DOI：
10.2320/matertrans.46.2959
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发表时间：
2005-12
影响因子：
1.2
通讯作者：
B. Wei;Taihua Zhang;Weihuo Li;D. Xing;L. Zhang;Y. R. Wang
中科院分区：
文献类型：
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作者：
B. Wei;Taihua Zhang;Weihuo Li;D. Xing;L. Zhang;Y. R. Wang
采用纳米压痕法研究了Ce基大块非晶合金的室温蠕变行为。由压痕蠕变曲线推导了铈基非晶合金的蠕变速率和蠕变速率敏感性。Ce基非晶合金较低的蠕变速率敏感性表明其室温蠕变以局部剪切流动为主。实验蠕变曲线可用广义Kelvin模型描述。此外，还计算了Ce基非晶合金的蠕变延迟谱。结果表明，蠕变延迟谱由两个相对分离的峰组成，具有明确的特征弛豫时间。
The room temperature creep behaviors of Ce-based bulk metallic glasses were examined by the use of nanoindentation. The creep rate and creep rate sensitivity of Ce-based BMGs were derived from indentation creep curves. The low creep rate sensitivity of Ce-based BMGs indicates that the room temperature creep is dominated by localized shear flow. The experimental creep curves can be described by a generalized Kelvin model. Furthermore, the creep retardation spectrum is calculated for the Ce-based metallic glasses. The results showed that creep retardation spectrum consists of two relatively separated peaks with the well defined characteristic relaxation times.