Hardness and yield strength of micro-nano TaC-Fe composite layer characterized through nano-indentation, finite element simulation and dimensional analysis
Hardness and yield strength of micro-nano TaC-Fe composite layer characterized through nano-indentation, finite element simulation and dimensional analysis
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DOI：
10.1016/j.ceramint.2019.10.062
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发表时间：
2020-02
影响因子：
5.2
通讯作者：
N. Zhao;Yurong Zhao;Jie Li;Heguang Liu;T. Shao;Yunhua Xu;Xin Wang;Zhengxin Lu;J. Chen;L. Xuan;Siyu Niu
中科院分区：
文献类型：
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作者：
N. Zhao;Yurong Zhao;Jie Li;Heguang Liu;T. Shao;Yunhua Xu;Xin Wang;Zhengxin Lu;J. Chen;L. Xuan;Siyu Niu
本文采用纳米压痕、有限元模拟和量纲分析等方法对钢基表面微纳米结构TaC-Fe复合材料的屈服强度进行了研究。采用有限元方法对不同屈服强度下TaC-Fe复合层的纳米压痕进行了模拟，得到了屈服强度为6、6.5、7和7.5 GPa时的等效应力云、等效应变云和载荷-位移曲线。利用量纲分析中的量纲定理对纳米压痕实验结果进行了分析，得到了载荷-位移曲线函数与微纳结构TaC-Fe复合层屈服强度、泊松比等力学参数之间的关系。结合尺寸-函数关系、仿真计算和纳米压痕实验获得的载荷-位移曲线，验证了尺寸分析模型的正确性和有限元模拟纳米压痕的可靠性。微纳米结构TaC-Fe复合层的屈服强度为7.05 GPa。
In this study, yield strength of TaC-Fe composite on steel-based surface micro-nanostructure was studied by nano-indentation, finite element simulation, and dimensional analysis. Finite element analysis was utilized to simulate nano-indentation of TaC-Fe composite layer under different yield strengths, and equivalent stress cloud, equivalent strain cloud, and load–displacement curves with yield strengths of 6, 6.5, 7, and 7.5 GPa were obtained. Nano-indentation experimental result was analyzed with the Π theorem in dimensional analysis, and the relationship between load–displacement curve function and mechanical parameters, such as yield strength and Poisson's ratio of micro-nano-structured TaC-Fe composite layer, was obtained. The correctness of the dimensional analysis model and the reliability of finite element simulation nano-indentation were validated using the combination of dimension-function relationship, simulation calculations, and load-displacement curve obtained through nano-indentation experimentation. Yield strength of micro-nanostructured TaC-Fe composite layer was determined as 7.05 GPa.