Measurement of the local mechanical properties in polycrystalline samples using spherical nanoindentation and orientation imaging microscopy
Measurement of the local mechanical properties in polycrystalline samples using spherical nanoindentation and orientation imaging microscopy
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DOI：
10.1016/j.actamat.2009.03.008
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发表时间：
2009-06-01
期刊：
影响因子：
9.4
通讯作者：
Kalidindi, Surya R.
中科院分区：
文献类型：
--
作者：
Pathak, Siddhartha;Stojakovic, Dejan;Kalidindi, Surya R.
本文描述了新型实验方案和数据分析程序的开发，用于从多晶样品上的球形纳米压痕中提取有意义的压痕应力-应变曲线，并将这些测量结果与压痕位点的取向成像显微镜测量的局部晶格取向相关联。特别是，我们证明可以估计多晶立方金属变形样品在完全退火条件下的局部滑移阻力增加的百分比。这些新颖的程序在铸态、30% 变形和 80% 变形条件下的 Fe-3% Si 样品上进行了演示。 (C) 2009 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
This paper describes the development of novel experimental protocols and data analysis procedures for extracting meaningful indentation stress-strain curves from spherical nanoindentation on polycrystalline samples, and correlating these measurements to the local crystal lattice orientation measured by orientation imaging microscopy at the indentation site. In particular, we demonstrate that it is possible to estimate the percentage increases in the local slip resistance in deformed samples of polycrystalline cubic metals from their fully annealed condition. These novel procedures are demonstrated on Fe-3% Si samples in the as-cast, 30% deformed and 80% deformed conditions. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.