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刘东旭 张泰华 郇勇. 宏观深度测量压入仪器的研制[J]. 力学学报, 2007, 23(3): 350-355. DOI: 10.6052/0459-1879-2007-3-2006-060
引用本文: 刘东旭 张泰华 郇勇. 宏观深度测量压入仪器的研制[J]. 力学学报, 2007, 23(3): 350-355. DOI: 10.6052/0459-1879-2007-3-2006-060
Dongxu Liu, Taihua Zhang, Yong Huan. Development of macro-depth-sensing-indentation instrumentation[J]. Chinese Journal of Theoretical and Applied Mechanics, 2007, 23(3): 350-355. DOI: 10.6052/0459-1879-2007-3-2006-060
Citation: Dongxu Liu, Taihua Zhang, Yong Huan. Development of macro-depth-sensing-indentation instrumentation[J]. Chinese Journal of Theoretical and Applied Mechanics, 2007, 23(3): 350-355. DOI: 10.6052/0459-1879-2007-3-2006-060

宏观深度测量压入仪器的研制

Development of macro-depth-sensing-indentation instrumentation

  • 摘要: 基于深度测量压入方法,以材料试验机Instron 5848Microtester作为加载平台,外接高分辨力位移传感器,设计专用夹具,开发出该材料试验机的宏观压入功能. 研究发现:对于机架柔度,无需再进行修正;对于压针接触面积,可用相关的方法计算. 采用Oliver-Pharr方法处理测试数据,可获得材料的硬度和弹性模量. 为了验证试验的可靠性,选用5种典型金属材料,将宏观压入测试结果与MTS Nano IndenterXP测试结果进行对比,二者基本一致,其分散性均在10\%以内. 显示了开发传统材料试验机宏观压入测试功能的可行性.

     

    Abstract: Using an Instron 5848 Microtester assembled with an additional displacementsensor and specially designed jigs as the main loading setup,DSI(depth-sensing indentation) tests were performed on typical metallicmaterials at macro range. From the indentation data, the hardness andmodulus of the materials were directly extrapolated without frame compliancecalibration employing an analysis procedure proposed by Oliver and Pharr. Inthis analysis the contact area was calculated for indentation depths \ge6\mu m from the area function of an ideal indenter tip and for depths <6\mu m from the area function suggested by Liu and Zhang. A comparisonbetween the our results and those from the MTS NanoIndenter XP showed that the repeatability isideal, and the scatter of both hardness and modulus values is within 10%.So, it is feasible to develop the DSI capacity of traditional materialtesting machines.

     

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