Method for highly spatially resolved determination of residual stress by using nanoindentation

被引：0
作者：
Simon Vogt
Thomas Greß
Franz Ferdinand Neumayer
Norbert Schwarzer
Adrian Harris
Wolfram Volk
机构：
[1] Technical University of Munich,
[2] Chair of Metal Forming and Casting,undefined
[3] Saxonian Institute of Surface Mechanics SIO,undefined
[4] Micro Materials Limited,undefined
[5] Willow House Yale Business Village Ellice Way,undefined
来源：
Production Engineering | 2019年 / 13卷
关键词：
Nanoindentation; Hole drilling method; Residual stress; Production engineering; Stress measurement; Strain measurement;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Measurement of highly spatially resolved residual stresses is a crucial task for tailoring the stress state during manufacturing to improve mechanical performance of metallic objects. Especially in sheet metal forming or blanking with sheet thicknesses down to 0.1 mm, a highly resolved pattern of the stress distribution over the sheet thickness is required for optimisation. For this purpose, a method which uses an extended Hertzian theory for calculating residual stresses from the results of nanoindentation is used to measure the stress profile in metallic cylinders. For verification of the indentation results, hole drilling is utilised to determine residual stresses in the near-surface area. This method provides similar assumptions about the stress state (biaxial). The measuring principle is also based on correlations between mechanical behaviour of the material and the residual stress distribution. The results yield a good accordance of the measured values despite the different scales of measurement. Therefore, a highly spatially resolved measurement of residual stresses with nanoindentation is possible and shows comparable values to the classic hole drilling technique.
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页码：133 / 138
页数：5
相关论文
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