A simple phenomenological approach to nanoindentation creep
A simple phenomenological approach to nanoindentation creep
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DOI：
10.1016/j.msea.2004.04.070
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发表时间：
2004-11-15
期刊：
影响因子：
6.4
通讯作者：
Fischer-Cripps, AC
中科院分区：
文献类型：
--
作者：
Fischer-Cripps, AC
纳米压痕法常用于测量陶瓷、金属、薄膜等结构材料的弹性模量和硬度。传统的纳米压痕分析方法背后的假设，其中卸载数据进行分析，是材料的行为在弹塑性的方式。然而，许多材料也可以表现出粘弹性和粘塑性响应，这通常被称为“蠕变”。在纳米压痕测试中，这通常被观察为在载荷-位移数据中在最大载荷下保持期间深度的增加。蠕变是不适应在传统的纳米压痕分析方法。目前的工作表明，如何传统的线性弹簧和阻尼元件可以用来模拟蠕变响应的范围广泛的材料使用的保持期间的力-位移数据。所示的方法可以很容易地纳入计算机程序，并可以使用任何传统的纳米压痕测试仪器使用球形或尖锐的压头。皇冠版权所有（C）2004年出版的爱思唯尔B. V.保留所有权利。
Nanoindentation is frequently used to measure elastic modulus and hardness of structural materials such as ceramics, metals and thin films. The assumption behind conventional nanoindentation analysis methods, where the unloading data is analysed, is that the material behaves in an elastic-plastic manner. However, many materials can also exhibit a visco-elastic and visco-plastic response which is commonly termed "creep". In a nanoindentation test, this is usually observed as an increase in depth during a hold period at maximum load in the load-displacement data. Creep is not accommodated in conventional nanoindentation analysis methods. The present work shows how conventional linear spring and dashpot elements can be used to model the creep response of a wide range of materials using the hold period force-displacement data. The method shown can be readily incorporated into a computer program and can be used with any conventional nanoindentation test instrument using either spherical or sharp indenters. Crown Copyright (C) 2004 Published by Elsevier B.V. All rights reserved.