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宏观深度测量压入仪器的研制

DEVELOPMENT OF MACRO-DEPTH-SENSING-INDENTATION INSTRUMENTATION

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【作者】 刘东旭张泰华郇勇

【Author】 Liu Dongxu Zhang Taihua Huan Yong (State Key Laboratory for Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China)

【机构】 中国科学院力学研究所非线性力学国家重点实验室中国科学院力学研究所非线性力学国家重点实验室 北京 100080北京 100080

【摘要】 基于深度测量压入方法,以材料试验机Instron 5848 Microtester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 Indenter(?) XP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 the Instron 5848 Microtester equipped with an additional displacement sensor and specially designed jigs as the main loading setup, DSI(depth-sensing indentation) tests were performed on typical metallic materials at a macro range. From the indentation data, the hardness and modulus of the materials were directly extrapolated without a frame compliance calibration, with an analysis procedure proposed by Oliver and Pharr. In this analysis, the contact area was calculated for indentation depths≥6μm from the area function of an ideal indenter tip and for depths <6μm from the area function suggested by Liu and Zhang. A comparison between our results and those from the MTS Nano Indenter(?) XP shows that the repeatability is ideal, and the scatter of both hardness and modulus values is within 10%. So, it is feasible to develop the DSI capacity for traditional material testing machines.

【基金】 国家自然科学基金资助项目(10572142,10432050,10602058)
  • 【文献出处】 力学学报 ,Chinese Journal of Theoretical and Applied Mechanics , 编辑部邮箱 ,2007年03期
  • 【分类号】TH87
  • 【被引频次】27
  • 【下载频次】231
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